mirror of
https://github.com/jfmengels/elm-review.git
synced 2024-09-20 12:37:37 +03:00
1414 lines
51 KiB
Elm
1414 lines
51 KiB
Elm
module NoUnused.VariablesTest exposing (all)
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import NoUnused.Variables exposing (rule)
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import Review.Test
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import Test exposing (Test, describe, test)
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details : List String
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details =
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[ "You should either use this value somewhere, or remove it at the location I pointed at."
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]
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all : Test
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all =
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describe "NoUnusedVariables"
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[ describe "Top-level variables" topLevelVariablesTests
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, describe "Recursive functions" recursiveFunctionsTests
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, describe "let..in" letInTests
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, describe "Top-level variables used inside a let..in" topLevelVariablesUsedInLetInTests
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, describe "Record updates" recordUpdateTests
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, describe "Function parameters" functionParameterTests
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, describe "Imports" importTests
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, describe "Pattern matching variables" patternMatchingVariablesTests
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, describe "Defined types" typeTests
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, describe "Opaque Types" opaqueTypeTests
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, describe "Operators" operatorTests
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, describe "Ports" portTests
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]
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recursiveFunctionsTests : List Test
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recursiveFunctionsTests =
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[ test "should report recursive functions that are not used elsewhere" <|
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\() ->
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"""module SomeModule exposing (a)
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fib n = fib (n - 1) + fib (n - 2)
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a = 1"""
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|> Review.Test.run rule
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|> Review.Test.expectErrors
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[ Review.Test.error
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{ message = "Top-level variable `fib` is not used"
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, details = details
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, under = "fib"
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}
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|> Review.Test.atExactly { start = { row = 2, column = 1 }, end = { row = 2, column = 4 } }
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|> Review.Test.whenFixed """module SomeModule exposing (a)
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a = 1"""
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]
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, test "should not report recursive functions that are used by other functions" <|
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\() ->
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"""module SomeModule exposing (a)
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a = fib 0
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fib n = fib (n - 1) + fib (n - 2)"""
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|> Review.Test.run rule
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|> Review.Test.expectNoErrors
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, test "should not report recursive functions that are exposed by the module" <|
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\() ->
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"""module SomeModule exposing (fib)
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fib n = fib (n - 1) + fib (n - 2)"""
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|> Review.Test.run rule
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|> Review.Test.expectNoErrors
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]
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topLevelVariablesTests : List Test
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topLevelVariablesTests =
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[ test "should not report exposed top-level variables" <|
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\() ->
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"""module SomeModule exposing (a)
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a = 1"""
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|> Review.Test.run rule
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|> Review.Test.expectNoErrors
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, test "should not report used top-level variables" <|
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\() ->
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"""module SomeModule exposing (b)
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a n = 1
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b = a 1"""
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|> Review.Test.run rule
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|> Review.Test.expectNoErrors
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, test "should report unused top-level variables" <|
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\() ->
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"""module SomeModule exposing (b)
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b = 1
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a = 2"""
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|> Review.Test.run rule
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|> Review.Test.expectErrors
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[ Review.Test.error
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{ message = "Top-level variable `a` is not used"
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, details = details
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, under = "a"
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}
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|> Review.Test.whenFixed """module SomeModule exposing (b)
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b = 1
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"""
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]
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, test "should report unused top-level variables with type annotation" <|
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\() ->
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"""module SomeModule exposing (b)
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b = 1
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a : Int
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a = 2"""
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|> Review.Test.run rule
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|> Review.Test.expectErrors
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[ Review.Test.error
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{ message = "Top-level variable `a` is not used"
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, details = details
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, under = "a"
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}
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|> Review.Test.atExactly { start = { row = 4, column = 1 }, end = { row = 4, column = 2 } }
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|> Review.Test.whenFixed """module SomeModule exposing (b)
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b = 1
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"""
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]
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, test "should report unused top-level variables even if they are annotated" <|
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\() ->
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"""module SomeModule exposing (b)
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a: Int
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a = 1
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b = 2"""
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|> Review.Test.run rule
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|> Review.Test.expectErrors
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[ Review.Test.error
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{ message = "Top-level variable `a` is not used"
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, details = details
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, under = "a"
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}
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|> Review.Test.atExactly { start = { row = 3, column = 1 }, end = { row = 3, column = 2 } }
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|> Review.Test.whenFixed """module SomeModule exposing (b)
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b = 2"""
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]
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, test "should report unused top-level variables with documentation attached" <|
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\() ->
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"""module SomeModule exposing (b)
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{-| Documentation
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-}
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unusedVar = 1
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b = 2"""
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|> Review.Test.run rule
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|> Review.Test.expectErrors
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[ Review.Test.error
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{ message = "Top-level variable `unusedVar` is not used"
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, details = details
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, under = "unusedVar"
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}
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|> Review.Test.whenFixed """module SomeModule exposing (b)
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b = 2"""
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]
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, test "should report unused top-level variables with documentation attached even if they are annotated" <|
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\() ->
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"""module SomeModule exposing (b)
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{-| Documentation
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-}
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unusedVar : Int
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unusedVar = 1
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b = 2"""
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|> Review.Test.run rule
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|> Review.Test.expectErrors
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[ Review.Test.error
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{ message = "Top-level variable `unusedVar` is not used"
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, details = details
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, under = "unusedVar"
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}
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|> Review.Test.atExactly { start = { row = 5, column = 1 }, end = { row = 5, column = 10 } }
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|> Review.Test.whenFixed """module SomeModule exposing (b)
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b = 2"""
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]
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, test "should not report unused top-level variables if everything is exposed" <|
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\() ->
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"""module SomeModule exposing (..)
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a n = 1
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b = a 1"""
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|> Review.Test.run rule
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|> Review.Test.expectNoErrors
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, test "should not report unused top-level variables that are exposed by name" <|
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\() ->
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"""module SomeModule exposing (a, b)
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a = 1
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b = 2"""
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|> Review.Test.run rule
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|> Review.Test.expectNoErrors
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, test "should not report unused top-level variables that are exposed by name, but report others" <|
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\() ->
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"""module SomeModule exposing (a, b)
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a = 1
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b = 2
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c = 3"""
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|> Review.Test.run rule
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|> Review.Test.expectErrors
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[ Review.Test.error
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{ message = "Top-level variable `c` is not used"
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, details = details
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, under = "c"
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}
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|> Review.Test.whenFixed """module SomeModule exposing (a, b)
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a = 1
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b = 2
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"""
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]
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, test "should not report unused top-level variables if everything is exposed (port module)" <|
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\() ->
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"""port module SomeModule exposing (..)
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a n = 1
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b = a 1"""
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|> Review.Test.run rule
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|> Review.Test.expectNoErrors
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, test "should not report unused top-level variables that are exposed by name (port module)" <|
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\() ->
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"""port module SomeModule exposing (a, b)
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a = 1
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b = 2"""
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|> Review.Test.run rule
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|> Review.Test.expectNoErrors
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, test "should not report unused top-level variables that are exposed by name, but report others (port module)" <|
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\() ->
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"""port module SomeModule exposing (a, b)
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a = 1
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b = 2
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c = 3"""
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|> Review.Test.run rule
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|> Review.Test.expectErrors
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[ Review.Test.error
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{ message = "Top-level variable `c` is not used"
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, details = details
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, under = "c"
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}
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|> Review.Test.whenFixed """port module SomeModule exposing (a, b)
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a = 1
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b = 2
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"""
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]
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, test "should report unused variable even if a homonym from a module is used" <|
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\() ->
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"""module SomeModule exposing (a)
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href = 1
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a = Html.Styled.Attributes.href"""
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|> Review.Test.run rule
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|> Review.Test.expectErrors
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[ Review.Test.error
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{ message = "Top-level variable `href` is not used"
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, details = details
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, under = "href"
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}
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|> Review.Test.atExactly { start = { row = 2, column = 1 }, end = { row = 2, column = 5 } }
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|> Review.Test.whenFixed """module SomeModule exposing (a)
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a = Html.Styled.Attributes.href"""
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]
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, test "should not report 'main' as unused, even if it's not exposed" <|
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\() ->
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"""module SomeModule exposing (a)
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main = Html.text "hello, world"
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a = ()
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"""
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|> Review.Test.run rule
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|> Review.Test.expectNoErrors
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, test "should not remove too much" <|
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\() ->
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"""module A exposing
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( getModuleName
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, isInScope
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)
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realFunctionOrType : List String -> String -> ModuleContext -> ( List String, String )
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realFunctionOrType moduleName functionOrType (ModuleContext context) =
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if List.length moduleName == 1 then
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Dict.get
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else
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moduleName
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isInScope : String -> Nonempty Scope -> Bool
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isInScope name scopes =
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NonemptyList.any (.names >> Dict.member name) scopes
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"""
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|> Review.Test.run rule
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|> Review.Test.expectErrors
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[ Review.Test.error
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{ message = "Top-level variable `realFunctionOrType` is not used"
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, details = details
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, under = "realFunctionOrType"
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}
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|> Review.Test.atExactly { start = { row = 8, column = 1 }, end = { row = 8, column = 19 } }
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|> Review.Test.whenFixed """module A exposing
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( getModuleName
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, isInScope
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)
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isInScope : String -> Nonempty Scope -> Bool
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isInScope name scopes =
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NonemptyList.any (.names >> Dict.member name) scopes
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"""
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]
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]
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letInTests : List Test
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letInTests =
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[ test "should report unused variables from let declarations" <|
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\() ->
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"""module SomeModule exposing (a)
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a = let b = 1
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in 2"""
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|> Review.Test.run rule
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|> Review.Test.expectErrors
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[ Review.Test.error
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{ message = "`let in` variable `b` is not used"
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, details = details
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, under = "b"
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}
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|> Review.Test.whenFixed """module SomeModule exposing (a)
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a = 2"""
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]
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, test "should report unused variables from let even if they are exposed by name" <|
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\() ->
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"""module SomeModule exposing (a, b)
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a = let b = 1
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c = 2
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in c"""
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|> Review.Test.run rule
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|> Review.Test.expectErrors
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[ Review.Test.error
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{ message = "`let in` variable `b` is not used"
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, details = details
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, under = "b"
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}
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|> Review.Test.atExactly { start = { row = 2, column = 9 }, end = { row = 2, column = 10 } }
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|> Review.Test.whenFixed "module SomeModule exposing (a, b)\na = let \n c = 2\n in c"
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]
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, test "should report unused function from let even if they are exposed by name" <|
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\() ->
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"""module SomeModule exposing (a, b)
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a = let b param = 1
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in 2"""
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|> Review.Test.run rule
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|> Review.Test.expectErrors
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[ Review.Test.error
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{ message = "`let in` variable `b` is not used"
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, details = details
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, under = "b"
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}
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|> Review.Test.atExactly { start = { row = 2, column = 9 }, end = { row = 2, column = 10 } }
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|> Review.Test.whenFixed """module SomeModule exposing (a, b)
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a = 2"""
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]
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, test "should report unused variables from let even if everything is exposed" <|
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\() ->
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"""module SomeModule exposing (..)
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a = let b = 1
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in 2"""
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|> Review.Test.run rule
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|> Review.Test.expectErrors
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[ Review.Test.error
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{ message = "`let in` variable `b` is not used"
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, details = details
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, under = "b"
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}
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|> Review.Test.whenFixed """module SomeModule exposing (..)
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a = 2"""
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]
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, test "should not report variables from let declarations that are used in the expression" <|
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\() ->
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"""module SomeModule exposing (a)
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a = let c = 1
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in c"""
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|> Review.Test.run rule
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|> Review.Test.expectNoErrors
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, test "should report 'main' as unused, even if it's not an exception for top-level declarations" <|
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\() ->
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"""module SomeModule exposing (a)
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a = let main = 1
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in 2"""
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|> Review.Test.run rule
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|> Review.Test.expectErrors
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[ Review.Test.error
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{ message = "`let in` variable `main` is not used"
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, details = details
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, under = "main"
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}
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|> Review.Test.whenFixed """module SomeModule exposing (a)
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a = 2"""
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]
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]
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topLevelVariablesUsedInLetInTests : List Test
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topLevelVariablesUsedInLetInTests =
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[ test "should not report top-level variables used inside a let expression" <|
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\() ->
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"""module SomeModule exposing (a)
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b = 1
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a = let c = 1
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in b + c"""
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|> Review.Test.run rule
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|> Review.Test.expectNoErrors
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, test "should not report top-level variables used inside let declarations" <|
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\() ->
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"""module SomeModule exposing (a)
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b = 1
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a = let c = b
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in c"""
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|> Review.Test.run rule
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|> Review.Test.expectNoErrors
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, test "should not report top-level variables used in nested lets" <|
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\() ->
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"""module SomeModule exposing (a)
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b = 1
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a = let
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c = b
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d = let
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e = 1
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in
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b + c + e
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in
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d"""
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|> Review.Test.run rule
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|> Review.Test.expectNoErrors
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]
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recordUpdateTests : List Test
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recordUpdateTests =
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[ test "should not report variables used in a record update expression's value to be updated" <|
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\() ->
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"""module SomeModule exposing (a)
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b = { c = 1 }
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a = { b | c = 3 }"""
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|> Review.Test.run rule
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|> Review.Test.expectNoErrors
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, test "should not report variables used in a record update expression's updates" <|
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\() ->
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"""module SomeModule exposing (a)
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b = { y = 1, z = 1 }
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d = 3
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e = 3
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a = { b | y = d, z = e }"""
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|> Review.Test.run rule
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|> Review.Test.expectNoErrors
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, test "should report variables even if they appear as keys of a record update expression's updates" <|
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\() ->
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"""module SomeModule exposing (a)
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b = { z = 1, c = 2 }
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c = 1
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a = { b | c = 3 }"""
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|> Review.Test.run rule
|
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|> Review.Test.expectErrors
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[ Review.Test.error
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{ message = "Top-level variable `c` is not used"
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, details = details
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, under = "c"
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}
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|> Review.Test.atExactly { start = { row = 3, column = 1 }, end = { row = 3, column = 2 } }
|
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|> Review.Test.whenFixed """module SomeModule exposing (a)
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b = { z = 1, c = 2 }
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a = { b | c = 3 }"""
|
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]
|
|
]
|
|
|
|
|
|
functionParameterTests : List Test
|
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functionParameterTests =
|
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[ test "should not report unused function parameters" <|
|
|
\() ->
|
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"""module SomeModule exposing (a)
|
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a n = 1"""
|
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|> Review.Test.run rule
|
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|> Review.Test.expectNoErrors
|
|
, test "should not report unused import when a type is deconstructed in a function call" <|
|
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\() ->
|
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"""module SomeModule exposing (a)
|
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import Bar
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a =
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\\(Bar.Baz range) -> []"""
|
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|> Review.Test.run rule
|
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|> Review.Test.expectNoErrors
|
|
, test "should not report custom type when it is deconstructed in a function call" <|
|
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\() ->
|
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"""module SomeModule exposing (a)
|
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type Baz = Baz String
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a =
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\\(Baz value) -> []"""
|
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|> Review.Test.run rule
|
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|> Review.Test.expectNoErrors
|
|
, test "should not report type alias when it is deconstructed in a function call" <|
|
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\() ->
|
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"""module SomeModule exposing (a)
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type alias Baz = { a : String}
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a =
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\\(Baz value) -> []"""
|
|
|> Review.Test.run rule
|
|
|> Review.Test.expectNoErrors
|
|
]
|
|
|
|
|
|
importTests : List Test
|
|
importTests =
|
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[ test "should report unused imported functions" <|
|
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\() ->
|
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"""module SomeModule exposing (b)
|
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import Foo exposing (a)"""
|
|
|> Review.Test.run rule
|
|
|> Review.Test.expectErrors
|
|
[ Review.Test.error
|
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{ message = "Imported variable `a` is not used"
|
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, details = details
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, under = "a"
|
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}
|
|
|> Review.Test.whenFixed """module SomeModule exposing (b)
|
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import Foo """
|
|
]
|
|
, test "should report unused imported functions (multiple imports)" <|
|
|
\() ->
|
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"""module SomeModule exposing (d)
|
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import Foo exposing (C, a, b)"""
|
|
|> Review.Test.run rule
|
|
|> Review.Test.expectErrors
|
|
[ Review.Test.error
|
|
{ message = "Imported type `C` is not used"
|
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, details = details
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, under = "C"
|
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}
|
|
|> Review.Test.whenFixed """module SomeModule exposing (d)
|
|
import Foo exposing (a, b)"""
|
|
, Review.Test.error
|
|
{ message = "Imported variable `a` is not used"
|
|
, details = details
|
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, under = "a"
|
|
}
|
|
|> Review.Test.whenFixed """module SomeModule exposing (d)
|
|
import Foo exposing (C, b)"""
|
|
, Review.Test.error
|
|
{ message = "Imported variable `b` is not used"
|
|
, details = details
|
|
, under = "b"
|
|
}
|
|
|> Review.Test.whenFixed """module SomeModule exposing (d)
|
|
import Foo exposing (C, a)"""
|
|
]
|
|
, test "should report unused imported functions (multiple imports on several lines)" <|
|
|
\() ->
|
|
"""module SomeModule exposing (d)
|
|
import Foo
|
|
exposing
|
|
( C
|
|
, a
|
|
, b
|
|
)"""
|
|
|> Review.Test.run rule
|
|
|> Review.Test.expectErrors
|
|
[ Review.Test.error
|
|
{ message = "Imported type `C` is not used"
|
|
, details = details
|
|
, under = "C"
|
|
}
|
|
|> Review.Test.whenFixed """module SomeModule exposing (d)
|
|
import Foo
|
|
exposing
|
|
( a
|
|
, b
|
|
)"""
|
|
, Review.Test.error
|
|
{ message = "Imported variable `a` is not used"
|
|
, details = details
|
|
, under = "a"
|
|
}
|
|
|> Review.Test.whenFixed
|
|
("""module SomeModule exposing (d)
|
|
import Foo
|
|
exposing
|
|
( C
|
|
"""
|
|
++ " "
|
|
++ """
|
|
, b
|
|
)"""
|
|
)
|
|
, Review.Test.error
|
|
{ message = "Imported variable `b` is not used"
|
|
, details = details
|
|
, under = "b"
|
|
}
|
|
|> Review.Test.whenFixed """module SomeModule exposing (d)
|
|
import Foo
|
|
exposing
|
|
( C
|
|
, a
|
|
)"""
|
|
]
|
|
, test "should report unused imported functions (multiple imports on several lines, function first)" <|
|
|
\() ->
|
|
"""module SomeModule exposing (d)
|
|
import Foo
|
|
exposing
|
|
( a
|
|
, b
|
|
)
|
|
d = 1"""
|
|
|> Review.Test.run rule
|
|
|> Review.Test.expectErrors
|
|
[ Review.Test.error
|
|
{ message = "Imported variable `a` is not used"
|
|
, details = details
|
|
, under = "a"
|
|
}
|
|
|> Review.Test.whenFixed
|
|
"""module SomeModule exposing (d)
|
|
import Foo
|
|
exposing
|
|
( b
|
|
)
|
|
d = 1"""
|
|
, Review.Test.error
|
|
{ message = "Imported variable `b` is not used"
|
|
, details = details
|
|
, under = "b"
|
|
}
|
|
|> Review.Test.whenFixed """module SomeModule exposing (d)
|
|
import Foo
|
|
exposing
|
|
( a
|
|
)
|
|
d = 1"""
|
|
]
|
|
, test "should report unused operator import" <|
|
|
\() ->
|
|
"""module SomeModule exposing (a)
|
|
import Parser exposing ((</>))"""
|
|
|> Review.Test.run rule
|
|
|> Review.Test.expectErrors
|
|
[ Review.Test.error
|
|
{ message = "Imported operator `</>` is not used"
|
|
, details = details
|
|
, under = "(</>)"
|
|
}
|
|
|> Review.Test.whenFixed """module SomeModule exposing (a)
|
|
import Parser """
|
|
]
|
|
, test "should report unused import" <|
|
|
\() ->
|
|
"""module SomeModule exposing (a)
|
|
import Html"""
|
|
|> Review.Test.run rule
|
|
|> Review.Test.expectErrors
|
|
[ Review.Test.error
|
|
{ message = "Imported module `Html` is not used"
|
|
, details = details
|
|
, under = "Html"
|
|
}
|
|
|> Review.Test.whenFixed "module SomeModule exposing (a)\n"
|
|
]
|
|
, test "should report unused import (multiples segments)" <|
|
|
\() ->
|
|
"""module SomeModule exposing (a)
|
|
import Html.Styled.Attributes"""
|
|
|> Review.Test.run rule
|
|
|> Review.Test.expectErrors
|
|
[ Review.Test.error
|
|
{ message = "Imported module `Html.Styled.Attributes` is not used"
|
|
, details = details
|
|
, under = "Html.Styled.Attributes"
|
|
}
|
|
|> Review.Test.whenFixed "module SomeModule exposing (a)\n"
|
|
]
|
|
, test "should not report import if it exposes all (should be improved by detecting if any exposed value is used)" <|
|
|
\() ->
|
|
"""module SomeModule exposing (a)
|
|
import Html.Styled.Attributes exposing (..)"""
|
|
|> Review.Test.run rule
|
|
|> Review.Test.expectNoErrors
|
|
, test "should not report used import (function access)" <|
|
|
\() ->
|
|
"""module SomeModule exposing (a)
|
|
import Html.Styled.Attributes
|
|
a = Html.Styled.Attributes.href"""
|
|
|> Review.Test.run rule
|
|
|> Review.Test.expectNoErrors
|
|
, test "should not report unused import if it is aliased" <|
|
|
\() ->
|
|
"""module SomeModule exposing (a)
|
|
import Html.Styled.Attributes as Html
|
|
a = Html.href"""
|
|
|> Review.Test.run rule
|
|
|> Review.Test.expectNoErrors
|
|
, test "should report unused import alias" <|
|
|
\() ->
|
|
"""module SomeModule exposing (a)
|
|
import Html.Styled.Attributes as Html
|
|
import Foo
|
|
a= Foo.a"""
|
|
|> Review.Test.run rule
|
|
|> Review.Test.expectErrors
|
|
[ Review.Test.error
|
|
{ message = "Module alias `Html` is not used"
|
|
, details = details
|
|
, under = "Html"
|
|
}
|
|
|> Review.Test.atExactly { start = { row = 2, column = 34 }, end = { row = 2, column = 38 } }
|
|
|> Review.Test.whenFixed """module SomeModule exposing (a)
|
|
import Foo
|
|
a= Foo.a"""
|
|
]
|
|
, test "should report unused import alias but not fix it if another alias is named like the original module name and we can't remove the whole import" <|
|
|
\() ->
|
|
"""module SomeModule exposing (a)
|
|
import Html as CoreHtml exposing (div)
|
|
import Html.Styled.Attributes as Html
|
|
a= Html.a div"""
|
|
|> Review.Test.run rule
|
|
|> Review.Test.expectErrors
|
|
[ Review.Test.error
|
|
{ message = "Module alias `CoreHtml` is not used"
|
|
, details = details
|
|
, under = "CoreHtml"
|
|
}
|
|
]
|
|
, test "should report unused import alias but and fix it if another alias is named like the original module name but we can remove the whole import" <|
|
|
\() ->
|
|
"""module SomeModule exposing (a)
|
|
import Html as CoreHtml
|
|
import Html.Styled.Attributes as Html
|
|
a= Html.a"""
|
|
|> Review.Test.run rule
|
|
|> Review.Test.expectErrors
|
|
[ Review.Test.error
|
|
{ message = "Module alias `CoreHtml` is not used"
|
|
, details = details
|
|
, under = "CoreHtml"
|
|
}
|
|
|> Review.Test.whenFixed """module SomeModule exposing (a)
|
|
import Html.Styled.Attributes as Html
|
|
a= Html.a"""
|
|
]
|
|
, test "should report unused import alias even if it exposes a used type" <|
|
|
\() ->
|
|
"""module SomeModule exposing (a)
|
|
import Html.Styled.Attributes as Html exposing (Attribute)
|
|
a : Attribute
|
|
a = ()"""
|
|
|> Review.Test.run rule
|
|
|> Review.Test.expectErrors
|
|
[ Review.Test.error
|
|
{ message = "Module alias `Html` is not used"
|
|
, details = details
|
|
, under = "Html"
|
|
}
|
|
|> Review.Test.atExactly { start = { row = 2, column = 34 }, end = { row = 2, column = 38 } }
|
|
|> Review.Test.whenFixed """module SomeModule exposing (a)
|
|
import Html.Styled.Attributes exposing (Attribute)
|
|
a : Attribute
|
|
a = ()"""
|
|
]
|
|
, test "should report unused import alias even if it is named like an exposed type" <|
|
|
\() ->
|
|
"""module SomeModule exposing (a)
|
|
import Html.Styled as Html exposing (Html)
|
|
a : Html
|
|
a = ()"""
|
|
|> Review.Test.run rule
|
|
|> Review.Test.expectErrors
|
|
[ Review.Test.error
|
|
{ message = "Module alias `Html` is not used"
|
|
, details = details
|
|
, under = "Html"
|
|
}
|
|
|> Review.Test.atExactly { start = { row = 2, column = 23 }, end = { row = 2, column = 27 } }
|
|
|> Review.Test.whenFixed """module SomeModule exposing (a)
|
|
import Html.Styled exposing (Html)
|
|
a : Html
|
|
a = ()"""
|
|
]
|
|
, test "should report import alias if the name is the same thing as the module name" <|
|
|
\() ->
|
|
"""module SomeModule exposing (a)
|
|
import Html as Html
|
|
a = Html.div"""
|
|
|> Review.Test.run rule
|
|
|> Review.Test.expectErrors
|
|
[ Review.Test.error
|
|
{ message = "Module `Html` is aliased as itself"
|
|
, details = [ "The alias is the same as the module name, and brings no useful value" ]
|
|
, under = "Html"
|
|
}
|
|
|> Review.Test.atExactly { start = { row = 2, column = 16 }, end = { row = 2, column = 20 } }
|
|
|> Review.Test.whenFixed """module SomeModule exposing (a)
|
|
import Html
|
|
a = Html.div"""
|
|
]
|
|
, test "should not report import that exposes a used exposed type" <|
|
|
\() ->
|
|
"""module SomeModule exposing (a)
|
|
import B exposing (C(..))
|
|
a : C
|
|
a = 1"""
|
|
|> Review.Test.run rule
|
|
|> Review.Test.expectNoErrors
|
|
, test "should not report import that exposes an unused exposed type (but whose subtype is potentially used)" <|
|
|
\() ->
|
|
"""module SomeModule exposing (a)
|
|
import B exposing (C(..))
|
|
a : D
|
|
a = 1"""
|
|
|> Review.Test.run rule
|
|
|> Review.Test.expectNoErrors
|
|
, test "should report unused import alias but not remove it if another import is aliased as the real name of the reported import and it exposes something" <|
|
|
\() ->
|
|
"""module SomeModule exposing (a)
|
|
import Html as RootHtml exposing (something)
|
|
import Html.Styled as Html
|
|
a : Html.Html msg
|
|
a = something 1"""
|
|
|> Review.Test.run rule
|
|
|> Review.Test.expectErrors
|
|
[ Review.Test.error
|
|
{ message = "Module alias `RootHtml` is not used"
|
|
, details = details
|
|
, under = "RootHtml"
|
|
}
|
|
]
|
|
, test "should report unused import alias and remove it if another import is aliased as the real name of the reported import but it doesn't expose anything" <|
|
|
\() ->
|
|
"""module SomeModule exposing (a)
|
|
import Html as RootHtml
|
|
import Html.Styled as Html
|
|
a : Html.Html msg
|
|
a = something 1"""
|
|
|> Review.Test.run rule
|
|
|> Review.Test.expectErrors
|
|
[ Review.Test.error
|
|
{ message = "Module alias `RootHtml` is not used"
|
|
, details = details
|
|
, under = "RootHtml"
|
|
}
|
|
|> Review.Test.whenFixed """module SomeModule exposing (a)
|
|
import Html.Styled as Html
|
|
a : Html.Html msg
|
|
a = something 1"""
|
|
]
|
|
, test "should report unused import even if a let in variable is named the same way" <|
|
|
\() ->
|
|
"""module SomeModule exposing (a)
|
|
import Html exposing (button, div)
|
|
a = let button = 1
|
|
in button + div"""
|
|
|> Review.Test.run rule
|
|
|> Review.Test.expectErrors
|
|
[ Review.Test.error
|
|
{ message = "Imported variable `button` is not used"
|
|
, details = details
|
|
, under = "button"
|
|
}
|
|
|> Review.Test.atExactly { start = { row = 2, column = 23 }, end = { row = 2, column = 29 } }
|
|
|> Review.Test.whenFixed """module SomeModule exposing (a)
|
|
import Html exposing (div)
|
|
a = let button = 1
|
|
in button + div"""
|
|
]
|
|
]
|
|
|
|
|
|
patternMatchingVariablesTests : List Test
|
|
patternMatchingVariablesTests =
|
|
[ test "should not report unused pattern matching parameters" <|
|
|
\() ->
|
|
"""module SomeModule exposing (a)
|
|
a = case thing of
|
|
Foo b c -> []"""
|
|
|> Review.Test.run rule
|
|
|> Review.Test.expectNoErrors
|
|
, test "should not report unused variable when used as the expression in a case expression" <|
|
|
\() ->
|
|
"""module SomeModule exposing (a)
|
|
b = 1
|
|
a =
|
|
case b of
|
|
_ -> 2"""
|
|
|> Review.Test.run rule
|
|
|> Review.Test.expectNoErrors
|
|
, test "should not report unused type when it is used in a pattern matching pattern" <|
|
|
\() ->
|
|
"""module SomeModule exposing (a)
|
|
type Bar = Baz
|
|
a =
|
|
case () of
|
|
Baz ->
|
|
[]"""
|
|
|> Review.Test.run rule
|
|
|> Review.Test.expectNoErrors
|
|
, test "should not report unused type when it is used in a pattern matching pattern (sub-pattern)" <|
|
|
\() ->
|
|
"""module SomeModule exposing (a)
|
|
type Bar = Baz
|
|
a =
|
|
case () of
|
|
Just (Baz range) ->
|
|
[]"""
|
|
|> Review.Test.run rule
|
|
|> Review.Test.expectNoErrors
|
|
, test "should not report unused import when a type from it is used in a pattern matching pattern" <|
|
|
\() ->
|
|
"""module SomeModule exposing (a)
|
|
import Bar
|
|
a =
|
|
case () of
|
|
Just (Bar.Baz range) ->
|
|
[]"""
|
|
|> Review.Test.run rule
|
|
|> Review.Test.expectNoErrors
|
|
, test "should not report unused import when a type is deconstructed in a function call" <|
|
|
\() ->
|
|
"""module SomeModule exposing (a)
|
|
import Bar
|
|
a (Bar.Baz range) =
|
|
[]
|
|
"""
|
|
|> Review.Test.run rule
|
|
|> Review.Test.expectNoErrors
|
|
, test "should not report unused imports when a type is deconstructed in a function call in a let" <|
|
|
\() ->
|
|
"""module SomeModule exposing (outer)
|
|
import Bar
|
|
outer arg =
|
|
let
|
|
inner (Bar.Baz range) =
|
|
[]
|
|
in
|
|
inner arg
|
|
"""
|
|
|> Review.Test.run rule
|
|
|> Review.Test.expectNoErrors
|
|
]
|
|
|
|
|
|
typeTests : List Test
|
|
typeTests =
|
|
[ test "should report unused custom type declarations" <|
|
|
\() ->
|
|
"""module SomeModule exposing (a)
|
|
type UnusedType = B | C
|
|
a = 1"""
|
|
|> Review.Test.run rule
|
|
|> Review.Test.expectErrors
|
|
[ Review.Test.error
|
|
{ message = "Type `UnusedType` is not used"
|
|
, details = details
|
|
, under = "UnusedType"
|
|
}
|
|
|> Review.Test.whenFixed """module SomeModule exposing (a)
|
|
a = 1"""
|
|
]
|
|
, test "should report unused custom type declarations with documentation" <|
|
|
\() ->
|
|
"""module SomeModule exposing (a)
|
|
{-| Documentation -}
|
|
type UnusedType = B | C
|
|
a = 1"""
|
|
|> Review.Test.run rule
|
|
|> Review.Test.expectErrors
|
|
[ Review.Test.error
|
|
{ message = "Type `UnusedType` is not used"
|
|
, details = details
|
|
, under = "UnusedType"
|
|
}
|
|
|> Review.Test.whenFixed """module SomeModule exposing (a)
|
|
a = 1"""
|
|
]
|
|
, test "should not report unused custom type constructors" <|
|
|
-- This is handled by the `NoUnused.CustomTypeConstructors` rule
|
|
\() ->
|
|
"""module SomeModule exposing (A)
|
|
type A = B | C"""
|
|
|> Review.Test.run rule
|
|
|> Review.Test.expectNoErrors
|
|
, test "should report unused type aliases declarations" <|
|
|
\() ->
|
|
"""module SomeModule exposing (a)
|
|
type alias A = { a : B }
|
|
a = 1"""
|
|
|> Review.Test.run rule
|
|
|> Review.Test.expectErrors
|
|
[ Review.Test.error
|
|
{ message = "Type `A` is not used"
|
|
, details = details
|
|
, under = "A"
|
|
}
|
|
|> Review.Test.atExactly { start = { row = 2, column = 12 }, end = { row = 2, column = 13 } }
|
|
|> Review.Test.whenFixed """module SomeModule exposing (a)
|
|
a = 1"""
|
|
]
|
|
, test "should report unused type aliases declarations with documentation" <|
|
|
\() ->
|
|
"""module SomeModule exposing (a)
|
|
{-| Documentation -}
|
|
type alias UnusedType = { a : B }
|
|
a = 1"""
|
|
|> Review.Test.run rule
|
|
|> Review.Test.expectErrors
|
|
[ Review.Test.error
|
|
{ message = "Type `UnusedType` is not used"
|
|
, details = details
|
|
, under = "UnusedType"
|
|
}
|
|
|> Review.Test.whenFixed """module SomeModule exposing (a)
|
|
a = 1"""
|
|
]
|
|
, test "should not report type alias used in a signature" <|
|
|
\() ->
|
|
"""module SomeModule exposing (a)
|
|
type alias A = { a : B }
|
|
a : A
|
|
a = {a = 1}"""
|
|
|> Review.Test.run rule
|
|
|> Review.Test.expectNoErrors
|
|
, test "should not report type alias used in a signature with multiple arguments" <|
|
|
\() ->
|
|
"""module SomeModule exposing (a)
|
|
type alias A = { a : B }
|
|
a : String -> A
|
|
a str = {a = str}"""
|
|
|> Review.Test.run rule
|
|
|> Review.Test.expectNoErrors
|
|
, test "should not report custom type used in a signature" <|
|
|
\() ->
|
|
"""module SomeModule exposing (a)
|
|
type A = B | C
|
|
a : A
|
|
a = {a = 1}"""
|
|
|> Review.Test.run rule
|
|
|> Review.Test.expectNoErrors
|
|
, test "should not report custom type used in a signature with multiple arguments" <|
|
|
\() ->
|
|
"""module SomeModule exposing (a)
|
|
type A = B | C
|
|
a : String -> A
|
|
a str = {a = str}"""
|
|
|> Review.Test.run rule
|
|
|> Review.Test.expectNoErrors
|
|
, test "should not report parameterized custom type used in a signature" <|
|
|
\() ->
|
|
"""module SomeModule exposing (a)
|
|
type CustomMaybe a = B a | C a
|
|
a : CustomMaybe D
|
|
a = []"""
|
|
|> Review.Test.run rule
|
|
|> Review.Test.expectNoErrors
|
|
, test "should not report type alias used in a signature with parameterized types (as parameter)" <|
|
|
\() ->
|
|
"""module SomeModule exposing (a)
|
|
type alias A = { a : B }
|
|
a : List A
|
|
a = []"""
|
|
|> Review.Test.run rule
|
|
|> Review.Test.expectNoErrors
|
|
, test "should not report custom type used in a signature with parameterized types (as parameter)" <|
|
|
\() ->
|
|
"""module SomeModule exposing (a)
|
|
type A = B | C
|
|
a : List A
|
|
a = []"""
|
|
|> Review.Test.run rule
|
|
|> Review.Test.expectNoErrors
|
|
, test "should not report type alias used in a signature with a record" <|
|
|
\() ->
|
|
"""module SomeModule exposing (a)
|
|
type alias A = { a : B }
|
|
a : { c: A }
|
|
a str = {c = str}"""
|
|
|> Review.Test.run rule
|
|
|> Review.Test.expectNoErrors
|
|
, test "should not report custom type used in a signature with a record" <|
|
|
\() ->
|
|
"""module SomeModule exposing (a)
|
|
type A = B | C
|
|
a : { c: A }
|
|
a str = {c = str}"""
|
|
|> Review.Test.run rule
|
|
|> Review.Test.expectNoErrors
|
|
, test "should not report type alias used in a signature with a generic record" <|
|
|
\() ->
|
|
"""module SomeModule exposing (a)
|
|
type alias A = { a : B }
|
|
a : { r | c: A }
|
|
a str = {c = str}"""
|
|
|> Review.Test.run rule
|
|
|> Review.Test.expectNoErrors
|
|
, test "should not report custom type used in a signature with a generic record" <|
|
|
\() ->
|
|
"""module SomeModule exposing (a)
|
|
type A = B | C
|
|
a : { r | c: A }
|
|
a str = {c = str}"""
|
|
|> Review.Test.run rule
|
|
|> Review.Test.expectNoErrors
|
|
, test "should not report type alias used in a custom type constructor definition" <|
|
|
\() ->
|
|
"""module SomeModule exposing (ExposedType)
|
|
type alias A = { a : B }
|
|
type ExposedType = Something A
|
|
"""
|
|
|> Review.Test.run rule
|
|
|> Review.Test.expectNoErrors
|
|
, test "should not report custom type used in a custom type constructor definition" <|
|
|
\() ->
|
|
"""module SomeModule exposing (ExposedType)
|
|
type A = B
|
|
type ExposedType = Something A
|
|
"""
|
|
|> Review.Test.run rule
|
|
|> Review.Test.expectNoErrors
|
|
, test "should not report custom type of which a constructor is used" <|
|
|
\() ->
|
|
"""module SomeModule exposing (b)
|
|
type A = B | C | D
|
|
b = B
|
|
"""
|
|
|> Review.Test.run rule
|
|
|> Review.Test.expectNoErrors
|
|
, test "should not report custom type of which a constructor is used even if it was defined afterwards" <|
|
|
\() ->
|
|
"""module SomeModule exposing (b)
|
|
b = B
|
|
type A = B | C | D
|
|
"""
|
|
|> Review.Test.run rule
|
|
|> Review.Test.expectNoErrors
|
|
, test "should not report type alias used in type signature inside a let..in" <|
|
|
\() ->
|
|
"""module SomeModule exposing (a)
|
|
type alias A = { a : B }
|
|
a = let
|
|
b : A
|
|
b = 1
|
|
in
|
|
b
|
|
"""
|
|
|> Review.Test.run rule
|
|
|> Review.Test.expectNoErrors
|
|
, test "should not report custom type used in type signature inside a let..in" <|
|
|
\() ->
|
|
"""module SomeModule exposing (a)
|
|
type A = A
|
|
a = let
|
|
b : A
|
|
b = 1
|
|
in
|
|
b
|
|
"""
|
|
|> Review.Test.run rule
|
|
|> Review.Test.expectNoErrors
|
|
, test "should not report type alias used in a type alias field" <|
|
|
\() ->
|
|
"""module SomeModule exposing (ExposedType)
|
|
type alias A = { a : B }
|
|
type alias ExposedType = { a : A }
|
|
"""
|
|
|> Review.Test.run rule
|
|
|> Review.Test.expectNoErrors
|
|
, test "should not report custom type used in a type alias field" <|
|
|
\() ->
|
|
"""module SomeModule exposing (ExposedType)
|
|
type A = B | C
|
|
type alias ExposedType = { a : A }
|
|
"""
|
|
|> Review.Test.run rule
|
|
|> Review.Test.expectNoErrors
|
|
, test "should not report type alias used in a type alias field's arguments " <|
|
|
\() ->
|
|
"""module SomeModule exposing (ExposedType)
|
|
type alias A = { a : B }
|
|
type alias ExposedType = { a : Maybe A }
|
|
"""
|
|
|> Review.Test.run rule
|
|
|> Review.Test.expectNoErrors
|
|
, test "should not report custom type used in a type alias field's arguments " <|
|
|
\() ->
|
|
"""module SomeModule exposing (ExposedType)
|
|
type A = B | C
|
|
type alias ExposedType = { a : Maybe A }
|
|
"""
|
|
|> Review.Test.run rule
|
|
|> Review.Test.expectNoErrors
|
|
, test "should not report type alias if it is exposed" <|
|
|
\() ->
|
|
"""module SomeModule exposing (A)
|
|
type alias A = { a : B }"""
|
|
|> Review.Test.run rule
|
|
|> Review.Test.expectNoErrors
|
|
, test "should not report custom type if it is exposed" <|
|
|
\() ->
|
|
"""module SomeModule exposing (A)
|
|
type A a = B a"""
|
|
|> Review.Test.run rule
|
|
|> Review.Test.expectNoErrors
|
|
, test "should not report custom type if it is exposed with its sub-types" <|
|
|
\() ->
|
|
"""module SomeModule exposing (A(..))
|
|
type A = B | C | D"""
|
|
|> Review.Test.run rule
|
|
|> Review.Test.expectNoErrors
|
|
, test "should report unused variable even if it is named like a custom type parameter" <|
|
|
\() ->
|
|
"""module SomeModule exposing (A)
|
|
a = 1
|
|
type A a = B a"""
|
|
|> Review.Test.run rule
|
|
|> Review.Test.expectErrors
|
|
[ Review.Test.error
|
|
{ message = "Top-level variable `a` is not used"
|
|
, details = details
|
|
, under = "a"
|
|
}
|
|
|> Review.Test.atExactly { start = { row = 2, column = 1 }, end = { row = 2, column = 2 } }
|
|
|> Review.Test.whenFixed """module SomeModule exposing (A)
|
|
type A a = B a"""
|
|
]
|
|
, test "should report unused variable even if it is present in a generic record type" <|
|
|
\() ->
|
|
"""module SomeModule exposing (a)
|
|
r = 1
|
|
a : { r | c: A }
|
|
a str = {c = str}"""
|
|
|> Review.Test.run rule
|
|
|> Review.Test.expectErrors
|
|
[ Review.Test.error
|
|
{ message = "Top-level variable `r` is not used"
|
|
, details = details
|
|
, under = "r"
|
|
}
|
|
|> Review.Test.atExactly { start = { row = 2, column = 1 }, end = { row = 2, column = 2 } }
|
|
|> Review.Test.whenFixed """module SomeModule exposing (a)
|
|
a : { r | c: A }
|
|
a str = {c = str}"""
|
|
]
|
|
, test "should not report custom type when it is deconstructed in a function call" <|
|
|
\() ->
|
|
"""module SomeModule exposing (a)
|
|
type Baz = Baz String
|
|
|
|
a (Baz range) =
|
|
[]"""
|
|
|> Review.Test.run rule
|
|
|> Review.Test.expectNoErrors
|
|
, test "should not report type alias when it is deconstructed in a function call" <|
|
|
\() ->
|
|
"""module SomeModule exposing (a)
|
|
type alias Baz = { a : String}
|
|
a (Baz value) =
|
|
[]"""
|
|
|> Review.Test.run rule
|
|
|> Review.Test.expectNoErrors
|
|
, test "should not report unused custom type when it is function call in a let" <|
|
|
\() ->
|
|
"""module SomeModule exposing (outer)
|
|
type Baz = Baz String
|
|
|
|
outer arg =
|
|
let
|
|
inner (Baz range) =
|
|
[]
|
|
in
|
|
inner arg
|
|
"""
|
|
|> Review.Test.run rule
|
|
|> Review.Test.expectNoErrors
|
|
, test "should not report unused type alias when it is function call in a let" <|
|
|
\() ->
|
|
"""module SomeModule exposing (outer)
|
|
type alias Baz = { a: String }
|
|
outer arg =
|
|
let
|
|
inner (Baz range) =
|
|
[]
|
|
in
|
|
inner arg
|
|
"""
|
|
|> Review.Test.run rule
|
|
|> Review.Test.expectNoErrors
|
|
]
|
|
|
|
|
|
opaqueTypeTests : List Test
|
|
opaqueTypeTests =
|
|
[ test "should report unused opaque types" <|
|
|
\() ->
|
|
"""module SomeModule exposing (a)
|
|
type A = A Int
|
|
a = 1"""
|
|
|> Review.Test.run rule
|
|
|> Review.Test.expectErrors
|
|
[ Review.Test.error
|
|
{ message = "Type `A` is not used"
|
|
, details = details
|
|
, under = "A"
|
|
}
|
|
|> Review.Test.atExactly { start = { row = 2, column = 6 }, end = { row = 2, column = 7 } }
|
|
|> Review.Test.whenFixed """module SomeModule exposing (a)
|
|
a = 1"""
|
|
]
|
|
, test "should not report used opaque types" <|
|
|
\() ->
|
|
"""module SomeModule exposing (a)
|
|
type A = A Int
|
|
a : A
|
|
a = 1"""
|
|
|> Review.Test.run rule
|
|
|> Review.Test.expectNoErrors
|
|
]
|
|
|
|
|
|
operatorTests : List Test
|
|
operatorTests =
|
|
[ test "should not report used operator (infix)" <|
|
|
\() ->
|
|
"""module SomeModule exposing (a)
|
|
import Parser exposing ((</>))
|
|
a = 1 </> 2"""
|
|
|> Review.Test.run rule
|
|
|> Review.Test.expectNoErrors
|
|
, test "should not report used operator (prefix)" <|
|
|
\() ->
|
|
"""module SomeModule exposing (a)
|
|
import Parser exposing ((</>))
|
|
a = (</>) 2"""
|
|
|> Review.Test.run rule
|
|
|> Review.Test.expectNoErrors
|
|
, test "should report unused operator (infix)" <|
|
|
\() ->
|
|
"""module SomeModule exposing (a)
|
|
import Parser exposing (something, (</>))
|
|
a = something"""
|
|
|> Review.Test.run rule
|
|
|> Review.Test.expectErrors
|
|
[ Review.Test.error
|
|
{ message = "Imported operator `</>` is not used"
|
|
, details = details
|
|
, under = "(</>)"
|
|
}
|
|
|> Review.Test.whenFixed """module SomeModule exposing (a)
|
|
import Parser exposing (something)
|
|
a = something"""
|
|
]
|
|
, test "should report unused operator (prefix)" <|
|
|
\() ->
|
|
"""module SomeModule exposing (a)
|
|
import Parser exposing (something, (</>))
|
|
a = something"""
|
|
|> Review.Test.run rule
|
|
|> Review.Test.expectErrors
|
|
[ Review.Test.error
|
|
{ message = "Imported operator `</>` is not used"
|
|
, details = details
|
|
, under = "(</>)"
|
|
}
|
|
|> Review.Test.whenFixed """module SomeModule exposing (a)
|
|
import Parser exposing (something)
|
|
a = something"""
|
|
]
|
|
]
|
|
|
|
|
|
portTests : List Test
|
|
portTests =
|
|
[ test "should not report types that are used in ports" <|
|
|
\() ->
|
|
"""port module SomeModule exposing (output, input)
|
|
import Json.Decode
|
|
import Json.Encode
|
|
port output : Json.Encode.Value -> Cmd msg
|
|
port input : (Json.Decode.Value -> msg) -> Sub msg"""
|
|
|> Review.Test.run rule
|
|
|> Review.Test.expectNoErrors
|
|
, test "should not report used ports" <|
|
|
\() ->
|
|
"""port module SomeModule exposing (a, subscriptions)
|
|
import Json.Decode
|
|
port output : () -> Cmd msg
|
|
port input : (Json.Decode.Value -> msg) -> Sub msg
|
|
|
|
a = output ()
|
|
subscriptions = input GotInput"""
|
|
|> Review.Test.run rule
|
|
|> Review.Test.expectNoErrors
|
|
, test "should report unused ports (ingoing)" <|
|
|
\() ->
|
|
"""port module SomeModule exposing (a)
|
|
a = 1
|
|
port input : (() -> msg) -> Sub msg"""
|
|
|> Review.Test.run rule
|
|
|> Review.Test.expectErrors
|
|
[ Review.Test.error
|
|
{ message = "Port `input` is not used (Warning: Removing this port may break your application if it is used in the JS code)"
|
|
, details = details
|
|
, under = "input"
|
|
}
|
|
]
|
|
, test "should report unused ports (outgoing)" <|
|
|
\() ->
|
|
"""port module SomeModule exposing (a)
|
|
a = 1
|
|
port output : String -> Cmd msg"""
|
|
|> Review.Test.run rule
|
|
|> Review.Test.expectErrors
|
|
[ Review.Test.error
|
|
{ message = "Port `output` is not used (Warning: Removing this port may break your application if it is used in the JS code)"
|
|
, details = details
|
|
, under = "output"
|
|
}
|
|
]
|
|
]
|