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added prop_select_two_consec to test_Selective.hs

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This commit is contained in:
Max Rabkin 2009-10-01 15:58:53 +00:00
parent 6ef8fd353d
commit d330dcae24
1 changed files with 7 additions and 1 deletions
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8
tests/test_Selective.hs
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@ -5,7 +5,7 @@
-- L.LimitWindows.
import XMonad.Layout.LimitWindows
import XMonad.StackSet hiding (focusUp, focusDown)
import XMonad.StackSet hiding (focusUp, focusDown, filter)
import Control.Applicative ((<$>))
import Test.QuickCheck
import Control.Arrow (second)
@ -52,6 +52,12 @@ prop_select_increasing sel (stk :: Stack Int) =
let res = integrate $ select sel stk
in and . zipWith (<) res $ tail res
-- selection has the form [0..l] ++ [m..n]
-- relies on the Arbitrary instance for Stack Int generating stacks like [0..k]
prop_select_two_consec sel (stk :: Stack Int) =
let wins = integrate $ select sel stk
in (length . filter not . zipWith ((==) . (+1)) wins $ tail wins) <= 1
-- update preserves invariants on selections
prop_update_nm sel (stk :: Stack Int) = nMaster (update sel stk) >= 0
prop_update_start sel (stk :: Stack Int) = nMaster sel' <= start sel'