From 34a21cc42231b98b660034c61fef793a35f69ddf Mon Sep 17 00:00:00 2001
From: Guido Trotter <ultrotter@google.com>
Date: Thu, 29 Nov 2012 09:57:59 +0100
Subject: [PATCH] Add tests for verticesByDegree{Asc,Desc}
This brings our coverage of Graph.hs to 100%
Signed-off-by: Guido Trotter <ultrotter@google.com>
Reviewed-by: Iustin Pop <iustin@google.com>
---
htest/Test/Ganeti/HTools/Graph.hs | 23 +++++++++++++++++++++++
1 file changed, 23 insertions(+)
diff --git a/htest/Test/Ganeti/HTools/Graph.hs b/htest/Test/Ganeti/HTools/Graph.hs
index e9f62cb32..4ded4dbfb 100644
--- a/htest/Test/Ganeti/HTools/Graph.hs
+++ b/htest/Test/Ganeti/HTools/Graph.hs
@@ -89,6 +89,27 @@ case_emptyVertColorMapEmpty :: Assertion
case_emptyVertColorMapEmpty =
assertEqual "" 0 $ IntMap.size emptyVertColorMap
+-- | Check if each two consecutive elements on a list
+-- respect a given condition.
+anyTwo :: (a -> a -> Bool) -> [a] -> Bool
+anyTwo _ [] = True
+anyTwo _ [_] = True
+anyTwo op (x:y:xs) = (x `op` y) && anyTwo op (y:xs)
+
+-- | Check order of vertices returned by verticesByDegreeAsc.
+prop_verticesByDegreeAscAsc :: TestableGraph -> Property
+prop_verticesByDegreeAscAsc (TestableGraph g) =
+ anyTwo (<=) (degrees asc) ==? True
+ where degrees = map (length . neighbors g)
+ asc = verticesByDegreeAsc g
+
+-- | Check order of vertices returned by verticesByDegreeDesc.
+prop_verticesByDegreeDescDesc :: TestableGraph -> Property
+prop_verticesByDegreeDescDesc (TestableGraph g) =
+ anyTwo (>=) (degrees desc) ==? True
+ where degrees = map (length . neighbors g)
+ desc = verticesByDegreeDesc g
+
-- | Check that our generated graphs are colorable
prop_isColorableTestableGraph :: TestableGraph -> Property
prop_isColorableTestableGraph (TestableGraph g) = isColorable g ==? True
@@ -132,6 +153,8 @@ prop_colorDsaturAllNodes = prop_colorAllNodes colorDsatur
testSuite "HTools/Graph"
[ 'case_emptyVertColorMapNull
, 'case_emptyVertColorMapEmpty
+ , 'prop_verticesByDegreeAscAsc
+ , 'prop_verticesByDegreeDescDesc
, 'prop_colorLFClique
, 'prop_colorDsaturClique
, 'prop_colorLFAllNodes
--
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