implement mutateGenomeRemoveGene

1 files changed, 29 insertions, 0 deletions

diff --git a/test/GenomeTest.hs b/test/GenomeTest.hs
index d775467..aa6d310 100644
--- a/test/GenomeTest.hs
+++ b/test/GenomeTest.hs
@@ -175,4 +175,33 @@ mutationTests = testGroup "mutations" $
       validSource (source new) @?= True
       validSink (sink new) @?= True
       (w >= -4) && (w <= 4) @?= True
+  , testCase "remove a gene" $
+    let
+      r = mkStdGen 1 -- randomR (0, 2) produces (1, 2, 0, ...)
+      genome = Genome 
+        { numInput = 1
+        , numInternal = 3
+        , numOutput = 1
+        , genes =
+          [ Gene { source = Input 0, sink = Internal 0, weight = 1.0 }
+          , Gene { source = Internal 0, sink = Internal 1, weight = 1.0 }
+          , Gene { source = Internal 2, sink = Output 0, weight = 1.0 }
+          ]
+        }
+      (genome', r') = mutateGenomeRemoveGene genome r
+      (genome'', r'') = mutateGenomeRemoveGene genome r'
+      (genome''', _) = mutateGenomeRemoveGene genome r''
+    in do
+      genes genome' @?= 
+        [ Gene { source = Input 0, sink = Internal 0, weight = 1.0 }
+        , Gene { source = Internal 2, sink = Output 0, weight = 1.0 }
+        ]
+      genes genome'' @?=
+        [ Gene { source = Input 0, sink = Internal 0, weight = 1.0 }
+        , Gene { source = Internal 0, sink = Internal 1, weight = 1.0 }
+        ]
+      genes genome''' @?=
+        [ Gene { source = Internal 0, sink = Internal 1, weight = 1.0 }
+        , Gene { source = Internal 2, sink = Output 0, weight = 1.0 }
+        ]
   ]