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Avoid 'head', which is partial.

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This commit is contained in:
Patrick Thomson 2019-09-24 00:57:22 -04:00
parent 1731df8bd8
commit 18a1a0d8b7
1 changed files with 5 additions and 4 deletions
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9
semantic-python/test/Test.hs
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@ -77,8 +77,10 @@ assertJQExpressionSucceeds directive tree core = do
fixtureTestTreeForFile :: HasCallStack => Path.RelFile -> Tasty.TestTree
fixtureTestTreeForFile fp = HUnit.testCaseSteps (Path.toString fp) $ \step -> withFrozenCallStack $ do
let fullPath = Path.relDir "semantic-python/test/fixtures" </> fp
perish s = liftIO (HUnit.assertFailure ("Directive parsing error: " <> s))
let fullPath = Path.relDir "semantic-python/test/fixtures" </> fp
perish s = liftIO (HUnit.assertFailure ("Directive parsing error: " <> s))
isComment = (== Just '#') . fmap fst . ByteString.uncons
-- Slurp the input file, taking lines from the beginning until we
-- encounter a line that doesn't have a '#'. For each line, parse
@ -87,9 +89,8 @@ fixtureTestTreeForFile fp = HUnit.testCaseSteps (Path.toString fp) $ \step -> wi
runResourceT
. Stream.toList_
. Stream.mapM (either perish pure . Directive.parseDirective)
. Stream.takeWhile ((== '#') . ByteString.head)
. Stream.takeWhile isComment
. Stream.mapped ByteStream.toStrict
. ByteStream.denull
. ByteStream.lines
. ByteStream.readFile @(ResourceT IO)
$ Path.toString fullPath