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55 lines
2.3 KiB
Haskell
55 lines
2.3 KiB
Haskell
module Source.Spec where
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import qualified Prelude
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import Prologue
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import Range
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import Source
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import SourceSpan
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import Test.Hspec
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import Test.Hspec.LeanCheck
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spec :: Spec
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spec = parallel $ do
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describe "actualLineRanges" $ do
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prop "produces 1 more range than there are newlines" $
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\ s -> let source = fromList s in
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Prologue.length (actualLineRanges (totalRange source) source) `shouldBe` succ (Prologue.length (filter (== '\n') s))
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prop "produces exhaustive ranges" $
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\ s -> let source = fromList s in
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foldMap (`slice` source) (actualLineRanges (totalRange source) source) `shouldBe` source
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describe "sourceSpanToRange" $ do
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prop "computes single-line ranges" $
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\ s -> let source = fromList s
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spans = zipWith (\ i Range {..} -> SourceSpan (SourcePos i 0) (SourcePos i (end - start))) [0..] ranges
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ranges = actualLineRanges (totalRange source) source in
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sourceSpanToRange source <$> spans `shouldBe` ranges
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prop "computes multi-line ranges" $
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\ s -> let source = fromList s in
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sourceSpanToRange source (totalSpan source) `shouldBe` totalRange source
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prop "computes sub-line ranges" $
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\ s -> let source = fromList ('*' : s <> "*") in
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sourceSpanToRange source (insetSpan (totalSpan source)) `shouldBe` insetRange (totalRange source)
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describe "totalSpan" $ do
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prop "covers single lines" $
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\ n -> totalSpan (fromList (replicate n '*')) `shouldBe` SourceSpan (SourcePos 0 0) (SourcePos 0 (max 0 n))
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prop "covers multiple lines" $
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\ n -> totalSpan (fromList (intersperse '\n' (replicate n '*'))) `shouldBe` SourceSpan (SourcePos 0 0) (SourcePos (max 0 (pred n)) (if n > 0 then 1 else 0))
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totalSpan :: Source -> SourceSpan
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totalSpan source = SourceSpan (SourcePos 0 0) (SourcePos (pred (Prologue.length ranges)) (end lastRange - start lastRange))
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where ranges = actualLineRanges (totalRange source) source
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lastRange = Prelude.last ranges
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insetSpan :: SourceSpan -> SourceSpan
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insetSpan sourceSpan = sourceSpan { spanStart = (spanStart sourceSpan) { column = succ (column (spanStart sourceSpan)) }
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, spanEnd = (spanEnd sourceSpan) { column = pred (column (spanEnd sourceSpan)) } }
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insetRange :: Range -> Range
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insetRange Range {..} = Range (succ start) (pred end)
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