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Generate arbitrary Fixed terms with bounds &c.

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This commit is contained in:
Rob Rix 2015-12-11 14:40:29 -05:00
parent c4326d54a0
commit 2e97bf44fc
1 changed files with 2 additions and 1 deletions
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3
test/Spec.hs
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@ -37,7 +37,8 @@ instance (Eq a, Eq annotation, Arbitrary a, Arbitrary annotation) => Arbitrary (
boundedSyntax 0 = liftM Leaf arbitrary
boundedSyntax n = frequency
[ (1, liftM Leaf arbitrary),
(4, liftM Indexed . listOf . boundedTerm $ n - 1) ]
(4, liftM Indexed . listOf . boundedTerm $ n - 1),
(4, liftM Fixed . listOf . boundedTerm $ n - 1) ]
shrink term@(ArbitraryTerm (annotation, syntax)) = (++) (subterms term) $ filter (/= term) $ ArbitraryTerm <$> ((,) <$> shrink annotation <*> shrinkSyntax syntax)
where shrinkSyntax (Leaf a) = Leaf <$> shrink a
shrinkSyntax (Indexed i) = Indexed <$> (List.subsequences i >>= recursivelyShrink)