8fa046798a
When you decompose a graph, each edge only appears once; on one of the nodes it is attached to. This meant our testing was not working properly. The easier solution is to forget how the graph works underneath, get a list of nodes and a list of edges, then operate on those.
102 lines
4.1 KiB
Haskell
102 lines
4.1 KiB
Haskell
{-
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Tock: a compiler for parallel languages
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Copyright (C) 2007 University of Kent
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This program is free software; you can redistribute it and/or modify it
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under the terms of the GNU General Public License as published by the
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Free Software Foundation, either version 2 of the License, or (at your
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option) any later version.
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This program is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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General Public License for more details.
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You should have received a copy of the GNU General Public License along
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with this program. If not, see <http://www.gnu.org/licenses/>.
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-}
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module FlowGraphTest (tests) where
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import Data.Generics
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import Data.Graph.Inductive
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import Data.List
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import qualified Data.Map as Map
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import Data.Maybe
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import Test.HUnit hiding (Node, State)
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import qualified AST as A
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import FlowGraph
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import Metadata
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import Utils
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makeMeta :: Int -> Meta
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makeMeta n = Meta (Just "FlowGraphTest") n n
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-- To make typing the tests as short as possible:
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m0 = makeMeta 0
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m1 = makeMeta 1
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m2 = makeMeta 2
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m3 = makeMeta 3
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m4 = makeMeta 4
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sm0 = A.Skip m0
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sm1 = A.Skip m1
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sm2 = A.Skip m2
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sm3 = A.Skip m3
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sm4 = A.Skip m4
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showGraph :: Graph g => g a b -> String
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showGraph g = " Nodes: " ++ show (nodes g) ++ " Edges: " ++ show (edges g)
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testGraph :: String -> [(Int, Meta)] -> [(Int, Int, EdgeLabel)] -> A.Process -> Test
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testGraph testName nodes edges proc
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= TestCase $
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case buildFlowGraph () (const ()) (A.OnlyP emptyMeta proc) of
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Left err -> assertFailure (testName ++ " graph building failed: " ++ err)
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Right g -> checkGraphEquality (nodes, edges) g
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where
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-- Checks two graphs are equal by creating a node mapping from the expected graph to the real map (checkNodeEquality),
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-- then mapping the edges across (transformEdge) and checking everything is right (in checkGraphEquality)
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checkGraphEquality :: (Graph g, Show b, Ord b) => ([(Int, Meta)], [(Int, Int, b)]) -> g (Meta, Int) b -> Assertion
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checkGraphEquality (nodes, edges) g
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= do let (remainingNodes, nodeLookup, ass) = foldl checkNodeEquality (Map.fromList (map revPair nodes),Map.empty, return ()) (labNodes g)
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ass
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assertBool (testName ++ " Test graph had nodes not found in the real graph: " ++ show remainingNodes ++ ", real graph: " ++ showGraph g) (Map.null remainingNodes)
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edges' <- mapM (transformEdge nodeLookup) edges
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assertEqual (testName ++ " Edge lists not equal") (sort $ edges') (sort $ labEdges g)
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checkNodeEquality :: (Map.Map Meta Int, Map.Map Int Int, Assertion) -> (Node, (Meta, Int)) -> (Map.Map Meta Int, Map.Map Int Int, Assertion)
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checkNodeEquality (metaToTestId, realToTestId, ass) (nodeId, (metaTag,metaSub))
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= case Map.lookup (sub metaTag metaSub) metaToTestId of
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Nothing -> (metaToTestId, realToTestId, ass >> assertFailure ("Node with meta tag " ++ show metaTag ++ " not found in expected test data"))
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Just testId -> let realToTestId' = Map.insert nodeId testId realToTestId in
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let metaToTestId' = Map.delete metaTag metaToTestId in
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(metaToTestId', realToTestId', ass)
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transformEdge :: Show b => Map.Map Int Int -> (Int, Int, b) -> IO (Int, Int, b)
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transformEdge nodeMap e@(start, end, label)
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= case mergeMaybe (Map.lookup start nodeMap) (Map.lookup end nodeMap) of
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Nothing -> do assertFailure ("Could not map test edge to real edge: " ++ show e)
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return e
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Just (start', end') -> return (start', end', label)
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testSeq :: Test
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testSeq = TestList
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[
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testSeq' 0 [(0,m1)] [] (A.Several m1 [])
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,testSeq' 1 [(0,m2)] [] (A.OnlyP m1 sm2)
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--TODO need some sort of primary key for nodes?
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--,testSeq' 2 [(0,m1), (1,m2)] [(0,1,ESeq),(1,
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]
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where
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testSeq' :: Int -> [(Int, Meta)] -> [(Int, Int, EdgeLabel)] -> A.Structured -> Test
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testSeq' n a b s = testGraph ("testSeq " ++ show n) a b (A.Seq m0 s)
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--Returns the list of tests:
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tests :: Test
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tests = TestList
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[
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testSeq
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]
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