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333 lines
11 KiB
Elm
333 lines
11 KiB
Elm
module NoUnusedExportsTest exposing (all)
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import Elm.Constraint
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import Elm.License
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import Elm.Module
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import Elm.Package
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import Elm.Project
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import Elm.Version
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import NoUnusedExports exposing (rule)
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import Review.Project as Project exposing (Project)
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import Review.Test
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import Test exposing (Test, describe, test)
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application : Project
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application =
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Project.new
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|> Project.withElmJson applicationElmJson
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applicationElmJson : Elm.Project.Project
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applicationElmJson =
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Elm.Project.Application
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{ elm = Elm.Version.one
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, dirs = []
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, depsDirect = []
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, depsIndirect = []
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, testDepsDirect = []
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, testDepsIndirect = []
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}
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package_ : Project
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package_ =
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Project.new
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|> Project.withElmJson (createPackageElmJson ())
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createPackageElmJson : () -> Elm.Project.Project
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createPackageElmJson _ =
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case ( Elm.Package.fromString "author/package", Elm.Constraint.fromString "1.0.0 <= v < 2.0.0", Elm.Module.fromString "Exposed" ) of
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( Just name, Just elm, Just moduleName ) ->
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Elm.Project.Package
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{ name = name
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, summary = "Summary"
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, license = Elm.License.bsd3
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, version = Elm.Version.one
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, exposed = Elm.Project.ExposedList [ moduleName ]
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, deps = []
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, testDeps = []
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, elm = elm
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}
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_ ->
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createPackageElmJson ()
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details : List String
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details =
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[ "This exposed element is never used. You may want to remove it to keep your project clean, and maybe detect some unused code in your project."
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]
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all : Test
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all =
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describe "NoUnusedExports"
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[ functionsAndValuesTests
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, typesTests
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-- TODO Add tests that report exposing the type's variants if they are never used.
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]
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functionsAndValuesTests : Test
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functionsAndValuesTests =
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describe "Functions and values"
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[ test "should report an exposed function when it is not used in other modules" <|
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\() ->
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"""
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module A exposing (a)
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a = 1
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"""
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|> Review.Test.runWithProjectData application rule
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|> Review.Test.expectErrors
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[ Review.Test.error
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{ message = "Exposed function or value `a` is never used outside this module."
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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 = 2, column = 20 }, end = { row = 2, column = 21 } }
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]
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, test "should not report an exposed function when it is used in other modules (qualified import)" <|
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\() ->
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[ """
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module A exposing (a)
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a = 1
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""", """
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module B exposing (main)
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import A
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main = A.a
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""" ]
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|> Review.Test.runOnModulesWithProjectData application rule
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|> Review.Test.expectNoErrors
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, test "should not report an exposed function when it is used in other modules (using an alias)" <|
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\() ->
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[ """
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module A exposing (a)
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a = 1
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""", """
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module B exposing (main)
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import A as SomeA
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main = SomeA.a
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""" ]
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|> Review.Test.runOnModulesWithProjectData application rule
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|> Review.Test.expectNoErrors
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, test "should not report an exposed function when it is used in other modules (using `exposing` to import)" <|
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\() ->
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[ """
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module A exposing (a)
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a = 1
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""", """
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module B exposing (main)
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import A exposing (a)
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main = a
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""" ]
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|> Review.Test.runOnModulesWithProjectData application rule
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|> Review.Test.expectNoErrors
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, test "should not report an exposed function when it is used in other modules (using `exposing(..)` to import)" <|
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\() ->
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[ """
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module A exposing (a)
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a = 1
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""", """
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module B exposing (main)
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import A exposing (..)
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main = a
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""" ]
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|> Review.Test.runOnModulesWithProjectData application rule
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|> Review.Test.expectNoErrors
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, test "should report an exposed function when it is not used in other modules, even if it is used in the module" <|
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\() ->
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"""
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module A exposing (exposed)
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exposed = 1
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main = exposed
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"""
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|> Review.Test.runWithProjectData package_ rule
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|> Review.Test.expectErrors
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[ Review.Test.error
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{ message = "Exposed function or value `exposed` is never used outside this module."
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, details = details
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, under = "exposed"
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}
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|> Review.Test.atExactly { start = { row = 2, column = 20 }, end = { row = 2, column = 27 } }
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]
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, test "should not report anything for modules that expose everything`" <|
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\() ->
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"""
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module A exposing (..)
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a = 1
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"""
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|> Review.Test.runWithProjectData package_ rule
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|> Review.Test.expectNoErrors
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, test "should not report the `main` function for an application even if it is unused" <|
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\() ->
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"""
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module Main exposing (main)
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main = text ""
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"""
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|> Review.Test.runWithProjectData application rule
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|> Review.Test.expectNoErrors
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, test "should report the `main` function for a package when it is never used outside the module" <|
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\() ->
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"""
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module Main exposing (main)
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main = text ""
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"""
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|> Review.Test.runWithProjectData package_ rule
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|> Review.Test.expectErrors
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[ Review.Test.error
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{ message = "Exposed function or value `main` is never used outside this module."
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, details = details
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, under = "main"
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}
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|> Review.Test.atExactly { start = { row = 2, column = 23 }, end = { row = 2, column = 27 } }
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]
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, test "should not report a function that does not refer to anything" <|
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\() ->
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"""
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module A exposing (b)
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a = 1
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"""
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|> Review.Test.runWithProjectData package_ rule
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|> Review.Test.expectNoErrors
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]
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typesTests : Test
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typesTests =
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describe "Types"
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[ test "should report an unused exposed custom type" <|
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\() ->
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"""
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module A exposing (Exposed)
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type Exposed = VariantA | VariantB
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"""
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|> Review.Test.runWithProjectData application rule
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|> Review.Test.expectErrors
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[ Review.Test.error
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{ message = "Exposed type or type alias `Exposed` is never used outside this module."
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, details = details
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, under = "Exposed"
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}
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|> Review.Test.atExactly { start = { row = 2, column = 20 }, end = { row = 2, column = 27 } }
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]
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, test "should not report a used exposed custom type (type signature)" <|
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\() ->
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[ """
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module A exposing (Exposed)
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type Exposed = VariantA | VariantB
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""", """
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module B exposing (main)
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import A
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main : A.Exposed
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main = VariantA
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""" ]
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|> Review.Test.runOnModulesWithProjectData application rule
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|> Review.Test.expectNoErrors
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, Test.skip <|
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test "should not report a used exposed custom type (type alias)" <|
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\() ->
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[ """
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module A exposing (ExposedB, ExposedC)
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type ExposedB = B
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type ExposedC = C
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""", """
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module Exposed exposing (B, C)
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import A
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type alias B = A.ExposedB
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type alias C = A.ExposedC
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""" ]
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|> Review.Test.runOnModulesWithProjectData package_ rule
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|> Review.Test.expectNoErrors
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, test "should not report an unused exposed custom type if it's part of the package's exposed API" <|
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\() ->
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"""
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module Exposed exposing (MyType)
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type MyType = VariantA | VariantB
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"""
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|> Review.Test.runWithProjectData package_ rule
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|> Review.Test.expectNoErrors
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, test "should not report an unused exposed custom type if it's present in the signature of an exposed function" <|
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\() ->
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"""
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module A exposing (main, MyType)
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type MyType = VariantA | VariantB
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main : () -> MyType
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main = 1
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"""
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|> Review.Test.runWithProjectData application rule
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|> Review.Test.expectNoErrors
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, Test.skip <|
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test "should not report an unused exposed custom type if it's aliased by an exposed type alias" <|
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\() ->
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[ """
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module A exposing (MyType, OtherType)
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type MyType = VariantA | VariantB
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type alias OtherType = MyType
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""", """
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module Exposed exposing (..)
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import A
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type alias B = A.OtherType
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""" ]
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|> Review.Test.runOnModulesWithProjectData package_ rule
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|> Review.Test.expectNoErrors
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, Test.skip <|
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test "should not report an unused exposed custom type if it's present in an exposed type alias" <|
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\() ->
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[ """
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module A exposing (MyType, OtherType)
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type MyType = VariantA | VariantB
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type alias OtherType = { thing : MyType }
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""", """
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module Exposed exposing (..)
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import A
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type alias B = A.OtherType
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""" ]
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|> Review.Test.runOnModulesWithProjectData package_ rule
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|> Review.Test.expectNoErrors
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, Test.skip <|
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test "should not report an unused exposed custom type if it's present in an exposed type alias (nested)" <|
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\() ->
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[ """
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module A exposing (MyType, OtherType)
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type MyType = VariantA | VariantB
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type alias OtherType = { other { thing : ((), MyType) } }
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""", """
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module Exposed exposing (..)
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import A
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type alias B = A.OtherType
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""" ]
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|> Review.Test.runOnModulesWithProjectData package_ rule
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|> Review.Test.expectNoErrors
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, Test.skip <|
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test "should not report an unused exposed custom type if it's present in an exposed custom type constructor's arguments" <|
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\() ->
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[ """
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module A exposing (MyType, OtherType)
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type MyType = VariantA | VariantB
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type OtherType = Thing MyType
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""", """
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module Exposed exposing (..)
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import A
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type alias B = A.OtherType
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""" ]
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|> Review.Test.runOnModulesWithProjectData package_ rule
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|> Review.Test.expectNoErrors
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, Test.skip <|
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test "should not report an unused exposed custom type if it's present in an exposed custom type constructor's arguments (nested)" <|
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\() ->
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[ """
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module A exposing (MyType, OtherType)
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type MyType = VariantA | VariantB
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type OtherType = OtherThing | SomeThing ((), List MyType)
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""", """
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module Exposed exposing (..)
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import A
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type alias B = A.OtherType
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""" ]
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|> Review.Test.runOnModulesWithProjectData package_ rule
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|> Review.Test.expectNoErrors
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]
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