f997b823dc
Initial commit of the beginnings of a Rain parser (still using the original occam AST) and its test framework, using HUnit
181 lines
6.9 KiB
Haskell
181 lines
6.9 KiB
Haskell
module RainParseTest () where
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import qualified RainParse as RP
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import qualified AST as A
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import Text.ParserCombinators.Parsec (runParser,eof)
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import Test.HUnit
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import Metadata (Meta,emptyMeta)
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import Prelude hiding (fail)
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data ParseTest a = Show a => ExpPass (String, RP.RainParser a , (a -> Assertion)) | ExpFail (String, RP.RainParser a)
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pass :: Show a => (String, RP.RainParser a , (a -> Assertion)) -> ParseTest a
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pass x = ExpPass x
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fail :: Show a => (String, RP.RainParser a) -> ParseTest a
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fail x = ExpFail x
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--TODO must make sure that the whole input is consumed? (is this needed?)
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--Runs a parse test, given a tuple of: (source text, parser function, assert)
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testParsePass :: Show a => (String, RP.RainParser a , (a -> Assertion)) -> Assertion
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testParsePass (text,prod,test)
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= case (runParser parser RP.emptyState "" text) of
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Left error -> assertString (show error)
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Right result -> ((return result) >>= test)
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where parser = do { p <- prod ; eof ; return p}
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testParseFail :: Show a => (String, RP.RainParser a) -> Assertion
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testParseFail (text,prod)
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= case (runParser parser RP.emptyState "" text) of
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Left error -> return ()
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Right result -> assertFailure ("Test was expected to fail:\n***BEGIN CODE***\n" ++ text ++ "\n*** END CODE ***\n")
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where parser = do { p <- prod ; eof ; return p}
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m :: Meta
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m = emptyMeta
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--Helper function for creating an A.Name object:
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simpleName :: String -> A.Name
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simpleName s = A.Name { A.nameName = s , A.nameMeta = emptyMeta , A.nameType = A.VariableName }
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--Helper function for creating a simple variable name as an expression:
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exprVariable :: String -> A.Expression
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exprVariable e = A.ExprVariable emptyMeta $ A.Variable emptyMeta $ simpleName e
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testExp0 = pass ("b",RP.expression,
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assertEqual "Variable Expression Test" (exprVariable "b") )
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testExp1 = pass ("b == c",RP.expression,
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assertEqual "Operator Expression Test" $ A.Dyadic emptyMeta A.Eq (exprVariable "b") (exprVariable "c") )
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--Helper function for ifs:
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makeIf :: [(A.Expression,A.Process)] -> A.Process
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makeIf list = A.If m $ A.Several m (map makeChoice list)
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where
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makeChoice :: (A.Expression,A.Process) -> A.Structured
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makeChoice (exp,proc) = A.OnlyC m $ A.Choice m exp proc
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makeSimpleAssign :: String -> String -> A.Process
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makeSimpleAssign dest src = A.Assign m [A.Variable m $ simpleName dest] (A.ExpressionList m [exprVariable src])
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testIf :: [ParseTest A.Process]
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testIf =
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[
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pass ("if (a) ;",RP.statement,
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assertEqual "If Test 0" $ makeIf [(exprVariable "a",A.Skip m),(A.True m,A.Skip m)])
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,pass ("if (a) ; else ;",RP.statement,
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assertEqual "If Test 1" $ makeIf [(exprVariable "a",A.Skip m),(A.True m,A.Skip m)])
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,pass ("if (a) ; else a = b;",RP.statement,
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assertEqual "If Test 2" $ makeIf [(exprVariable "a",A.Skip m),(A.True m,makeSimpleAssign "a" "b")])
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,pass ("if (a) ; else if (b) ; ",RP.statement,
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assertEqual "If Test 3" $ makeIf [(exprVariable "a",A.Skip m),(A.True m,makeIf [(exprVariable "b",A.Skip m),(A.True m,A.Skip m)])])
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,pass ("if (a) ; else if (b) ; else ; ",RP.statement,
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assertEqual "If Test 4" $ makeIf [(exprVariable "a",A.Skip m),(A.True m,makeIf [(exprVariable "b",A.Skip m),(A.True m,A.Skip m)])])
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,pass ("if (a) c = d; else if (b) e = f; else g = h;",RP.statement,
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assertEqual "If Test 5" $ makeIf [(exprVariable "a",makeSimpleAssign "c" "d"),(A.True m,makeIf [(exprVariable "b",makeSimpleAssign "e" "f"),(A.True m,makeSimpleAssign "g" "h")])])
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--TODO add fail tests, maybe {} brackets
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]
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testAssign :: [ParseTest A.Process]
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testAssign =
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[
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pass ("a = b;",RP.statement,
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assertEqual "Assign Test 0" $ makeSimpleAssign "a" "b")
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,fail ("a != b;",RP.statement)
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]
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testWhile :: [ParseTest A.Process]
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testWhile =
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[
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pass ("while (a) ;",RP.statement,
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assertEqual "While Test" $ A.While emptyMeta (exprVariable "a") (A.Skip emptyMeta) )
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,fail ("while (a)",RP.statement)
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,fail ("while () ;",RP.statement)
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,fail ("while () {}",RP.statement)
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,fail ("while ;",RP.statement)
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,fail ("while {}",RP.statement)
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,fail ("while ",RP.statement)
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]
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testSeq :: [ParseTest A.Process]
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testSeq =
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[
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pass ("seq { }",RP.statement,
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assertEqual "Empty Seq Test" $ A.Seq m $ A.Several m [] )
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,pass ("seq { ; ; }",RP.statement,
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assertEqual "Seq Skip Test" $ A.Seq m $ A.Several m [(A.OnlyP m (A.Skip m)),(A.OnlyP m (A.Skip m))] )
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,pass ("{ }",RP.statement,
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assertEqual "Empty Unlabelled-Seq Test" $ A.Seq m $ A.Several m [] )
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,pass ("{ ; ; }",RP.statement,
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assertEqual "Unlabelled-Seq Skip Test" $ A.Seq m $ A.Several m [(A.OnlyP m (A.Skip m)),(A.OnlyP m (A.Skip m))] )
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,pass ("{ { } }",RP.statement,
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assertEqual "Unlabelled-Seq Nest Test 0" $ A.Seq m $ A.Several m [A.OnlyP m $ A.Seq m (A.Several m [])] )
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,pass ("seq { { } }",RP.statement,
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assertEqual "Unlabelled-Seq Nest Test 1" $ A.Seq m $ A.Several m [A.OnlyP m $ A.Seq m (A.Several m [])] )
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,pass ("{ seq { } }",RP.statement,
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assertEqual "Unlabelled-Seq Nest Test 2" $ A.Seq m $ A.Several m [A.OnlyP m $ A.Seq m (A.Several m [])] )
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,pass ("{ ; {} }",RP.statement,
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assertEqual "Unlabelled-Seq Nest Test 3" $ A.Seq m $ A.Several m [(A.OnlyP m (A.Skip m)),(A.OnlyP m $ A.Seq m (A.Several m []))] )
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,pass ("seq { ; {} }",RP.statement,
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assertEqual "Unlabelled-Seq Nest Test 4" $ A.Seq m $ A.Several m [(A.OnlyP m (A.Skip m)),(A.OnlyP m $ A.Seq m (A.Several m []))] )
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,pass ("{ ; seq {} }",RP.statement,
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assertEqual "Unlabelled-Seq Nest Test 5" $ A.Seq m $ A.Several m [(A.OnlyP m (A.Skip m)),(A.OnlyP m $ A.Seq m (A.Several m []))] )
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,fail ("seq",RP.statement)
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,fail ("seq ;",RP.statement)
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,fail ("seq {",RP.statement)
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,fail ("seq }",RP.statement)
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,fail ("{",RP.statement)
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,fail ("}",RP.statement)
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,fail ("seq seq {}",RP.statement)
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,fail ("seq seq",RP.statement)
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,fail ("seq {}}",RP.statement)
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,fail ("seq {{}",RP.statement)
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--should fail, because it is two statements, not one:
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,fail ("seq {};",RP.statement)
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,fail ("{};",RP.statement)
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]
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testPar :: [ParseTest A.Process]
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testPar =
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[
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pass ("par { }",RP.statement,
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assertEqual "Empty Par Test" $ A.Par m A.PlainPar $ A.Several m [] )
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,pass ("par { ; ; }",RP.statement,
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assertEqual "Par Skip Test" $ A.Par m A.PlainPar $ A.Several m [(A.OnlyP m (A.Skip m)),(A.OnlyP m (A.Skip m))] )
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]
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--Returns the list of tests:
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testList :: [Test]
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testList =
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[
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parseTest testExp0,parseTest testExp1,
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parseTests testWhile,
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parseTests testSeq,
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parseTests testPar,
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parseTests testIf,
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parseTests testAssign
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]
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where
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parseTest :: Show a => ParseTest a -> Test
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parseTest (ExpPass test) = TestCase (testParsePass test)
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parseTest (ExpFail test) = TestCase (testParseFail test)
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parseTests :: Show a => [ParseTest a] -> Test
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parseTests tests = TestList (map parseTest tests)
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--Main function; runs the tests
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main :: IO ()
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main = do runTestTT $ TestList testList
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return ()
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