implement individual gene mutation functions

1 files changed, 72 insertions, 0 deletions

diff --git a/test/GenomeTest.hs b/test/GenomeTest.hs
new file mode 100644
index 0000000..0a27a94
--- /dev/null
+++ b/test/GenomeTest.hs
@@ -0,0 +1,72 @@
+module GenomeTest (suite) where
+
+import Test.Tasty
+import Test.Tasty.HUnit
+import qualified Mind as M
+import Genome
+import System.Random
+
+suite :: TestTree
+suite = testGroup "genome tests" $
+  [ mutationTests
+  ]
+
+
+mutationTests :: TestTree
+mutationTests = testGroup "mutations" $
+  [ testCase "mutating the source of a gene" $
+    let
+      rand = mkStdGen 1 -- randomR generates sequence (1, 2, 0, ...)
+      genome = Genome { numInput = 2, numInternal = 1, numOutput = 5, genes = [] }
+      sourceGene = Gene { source = M.Input 0, sink = M.Output 1, weight = 4 }
+      mutatedGenes = fst $ foldl
+        (\(list, r) g ->
+          let (g', r') = mutateGeneSource genome g r
+          in (list ++ [g'], r')
+        )
+        ([], rand)
+        (replicate 3 sourceGene)
+    in
+      mutatedGenes @?=
+      [ Gene { source = M.Input 1, sink = M.Output 1, weight = 4 }
+      , Gene { source = M.Internal 0, sink = M.Output 1, weight = 4 }
+      , Gene { source = M.Input 0, sink = M.Output 1, weight = 4 }
+      ]
+  , testCase "mutating the sink of a gene" $
+    let
+      rand = mkStdGen 1 -- randomR generates sequence (1, 2, 0, ...)
+      genome = Genome { numInput = 2, numInternal = 1, numOutput = 2, genes = [] }
+      sourceGene = Gene { source = M.Input 0, sink = M.Output 1, weight = 4 }
+      mutatedGenes = fst $ foldl
+        (\(list, r) g ->
+          let (g', r') = mutateGeneSink genome g r
+          in (list ++ [g'], r')
+        )
+        ([], rand)
+        (replicate 3 sourceGene)
+    in
+      mutatedGenes @?=
+      [ Gene { source = M.Input 0, sink = M.Output 0, weight = 4 }
+      , Gene { source = M.Input 0, sink = M.Output 1, weight = 4 }
+      , Gene { source = M.Input 0, sink = M.Internal 0, weight = 4 }
+      ]
+  , testCase "mutating the weight of a gene" $
+    let
+      rand = mkStdGen 0 -- randomR generates sequence (7.572357,-1.4116564,-7.2413177, ...)
+      genome = Genome { numInput = 2, numInternal = 1, numOutput = 2, genes = [] }
+      sourceGene = Gene { source = M.Input 0, sink = M.Output 1, weight = 4 }
+      mutatedGenes = fst $ foldl
+        (\(list, r) g ->
+          let (g', r') = mutateGeneWeight genome g r
+          in (list ++ [g'], r')
+        )
+        ([], rand)
+        (replicate 3 sourceGene)
+    in
+      mutatedGenes @?=
+      [ Gene { source = M.Input 0, sink = M.Output 1, weight = 7.572357}
+      , Gene { source = M.Input 0, sink = M.Output 1, weight = -1.4116564 }
+      , Gene { source = M.Input 0, sink = M.Internal 1, weight = -7.2413177  }
+      ]
+
+  ]