wip: code formatting nits continued

test/stub-methods.spec.js

@@ -0,0 +1,34 @@
+import lodashStable from 'lodash';
+import { _, empties } from './utils';
+
+describe('stub methods', () => {
+    lodashStable.each(
+        ['noop', 'stubTrue', 'stubFalse', 'stubArray', 'stubObject', 'stubString'],
+        (methodName) => {
+            const func = _[methodName];
+
+            const pair = {
+                stubArray: [[], 'an empty array'],
+                stubFalse: [false, '`false`'],
+                stubObject: [{}, 'an empty object'],
+                stubString: ['', 'an empty string'],
+                stubTrue: [true, '`true`'],
+                noop: [undefined, '`undefined`'],
+            }[methodName];
+
+            const values = Array(2).concat(empties, true, 1, 'a');
+            const expected = lodashStable.map(values, lodashStable.constant(pair[0]));
+
+            it(`\`_.${methodName}\` should return ${pair[1]}`, () => {
+                const actual = lodashStable.map(values, (value, index) => {
+                    if (index < 2) {
+                        return index ? func.call({}) : func();
+                    }
+                    return func(value);
+                });
+
+                expect(actual).toEqual(expected);
+            });
+        },
+    );
+});