add mutation_type and mutate()

1 files changed, 20 insertions, 0 deletions

diff --git a/src/genome/genome.test.js b/src/genome/genome.test.js
new file mode 100644
index 0000000..853d103
--- /dev/null
+++ b/src/genome/genome.test.js
@@ -0,0 +1,20 @@
+'use strict';

+

+import { mutation_type, mutate } from './genome';

+

+

+test('basic gene mutations', () => {

+  expect(mutate([0, 1, 2], mutation_type.none, 0)).toEqual([0, 1, 2]);

+

+  expect(mutate([0, 1, 2], mutation_type.source, 0.2)).toEqual([0, 1, 2]);

+  expect(mutate([1, 1, 2], mutation_type.source, 0.2)).toEqual([0, 1, 2]);

+  expect(mutate([0, 1, 2], mutation_type.source, 0.8)).toEqual([1, 1, 2]);

+

+  expect(mutate([0, 1, 2], mutation_type.sink, 0.2)).toEqual([0, 0, 2]);

+  expect(mutate([0, 1, 2], mutation_type.sink, 0.8)).toEqual([0, 2, 2]);

+  expect(mutate([0, 0, 2], mutation_type.sink, 0.2)).toEqual([0, 0, 2]);

+

+  expect(mutate([0, 1, 2], mutation_type.weight, 0.5)).toEqual([0, 1, 0]);

+  expect(mutate([0, 1, 2], mutation_type.weight, 0.0)).toEqual([0, 1, -4]);

+  expect(mutate([0, 1, 2], mutation_type.weight, 1.0)).toEqual([0, 1, 4]);

+});