wip: code formatting nits continued

test/every.spec.js

@@ -0,0 +1,82 @@
+import lodashStable from 'lodash';
+import { identity, empties, stubTrue, stubFalse } from './utils';
+import every from '../src/every';
+
+describe('every', () => {
+    it('should return `true` if `predicate` returns truthy for all elements', () => {
+        expect(lodashStable.every([true, 1, 'a'], identity)).toBe(true);
+    });
+
+    it('should return `true` for empty collections', () => {
+        const expected = lodashStable.map(empties, stubTrue);
+
+        const actual = lodashStable.map(empties, (value) => {
+            try {
+                return every(value, identity);
+            } catch (e) {}
+        });
+
+        expect(actual).toEqual(expected);
+    });
+
+    it('should return `false` as soon as `predicate` returns falsey', () => {
+        let count = 0;
+
+        assert.strictEqual(
+            every([true, null, true], (value) => {
+                count++;
+                return value;
+            }),
+            false,
+        );
+
+        expect(count).toBe(2);
+    });
+
+    it('should work with collections of `undefined` values (test in IE < 9)', () => {
+        expect(every([undefined, undefined, undefined], identity)).toBe(false);
+    });
+
+    it('should use `_.identity` when `predicate` is nullish', () => {
+        const values = [, null, undefined];
+        let expected = lodashStable.map(values, stubFalse);
+
+        let actual = lodashStable.map(values, (value, index) => {
+            const array = [0];
+            return index ? every(array, value) : every(array);
+        });
+
+        expect(actual).toEqual(expected);
+
+        expected = lodashStable.map(values, stubTrue);
+        actual = lodashStable.map(values, (value, index) => {
+            const array = [1];
+            return index ? every(array, value) : every(array);
+        });
+
+        expect(actual).toEqual(expected);
+    });
+
+    it('should work with `_.property` shorthands', () => {
+        const objects = [
+            { a: 0, b: 1 },
+            { a: 1, b: 2 },
+        ];
+        expect(every(objects, 'a')).toBe(false);
+        expect(every(objects, 'b')).toBe(true);
+    });
+
+    it('should work with `_.matches` shorthands', () => {
+        const objects = [
+            { a: 0, b: 0 },
+            { a: 0, b: 1 },
+        ];
+        expect(every(objects, { a: 0 })).toBe(true);
+        expect(every(objects, { b: 1 })).toBe(false);
+    });
+
+    it('should work as an iteratee for methods like `_.map`', () => {
+        const actual = lodashStable.map([[1]], every);
+        expect(actual).toEqual([true]);
+    });
+});