utils in another file

test/utils.test.js

@@ -0,0 +1,67 @@
+/* jshint -W117 */
+const utils = require('../src/utils');
+
+describe('merge', () => {
+  test('undefined', () => {
+    const res = utils.merge({'a': 1}, undefined);
+    expect(res).toEqual({'a': 1});
+  });
+  test('redefine', () => {
+    const res = utils.merge({'a': 1}, {'a': 2});
+    expect(res).toEqual({'a': 2});
+  });
+  test('wrong type', () => {
+    const res = utils.merge({'a': 'hello'}, {'a': 2});
+    expect(res).toEqual({'a': 'hello'});
+  });
+  test('array redefine', () => {
+    const res = utils.merge({'a': [1, 2, 3]}, {'a': [4, 5, 6]});
+    expect(res).toEqual({'a': [4, 5, 6]});
+  });
+  test('sub object wrong type', () => {
+    const res = utils.merge({'a': {'b': 5}}, {'a': 5});
+    expect(res).toEqual({'a': {'b': 5}});
+  });
+  test('sub object redefine', () => {
+    const res = utils.merge({'a': {'b': 5}}, {'a': {'b': 6}});
+    expect(res).toEqual({'a': {'b': 6}});
+  });
+  test('add missing keys', () => {
+    const res = utils.merge({'a': 1, 'b': 3}, {'a': 2});
+    expect(res).toEqual({'a': 2, 'b': 3});
+  });
+  test('extra keys ignore', () => {
+    const res = utils.merge({'a': 1}, {'a': 2, 'b': 3});
+    expect(res).toEqual({'a': 2});
+  });
+});
+
+test('ezClone', () => {
+  const a = {
+    'a': 5,
+    'b': {
+      'c': [1, 2, 3]
+    }
+  };
+  const b = utils.ezClone(a);
+  expect(b).toEqual(a);
+  b.b.c[1] = 3;
+  expect(b).toEqual({
+    'a': 5,
+    'b': {
+      'c': [1, 3, 3]
+    }
+  });
+  expect(a).toEqual({
+    'a': 5,
+    'b': {
+      'c': [1, 2, 3]
+    }
+  });
+});
+
+test('newMap', () => {
+  expect(utils.newMap(2, 3, 3)).toEqual([
+    [3, 3, 3], [3, 3, 3]
+  ]);
+});