wip: code formatting nits continued

test/chunk.spec.js

@@ -0,0 +1,48 @@
+import lodashStable from 'lodash';
+import { falsey, stubArray } from './utils';
+import chunk from '../src/chunk';
+
+describe('chunk', () => {
+    const array = [0, 1, 2, 3, 4, 5];
+
+    it('should return chunked arrays', () => {
+        const actual = chunk(array, 3);
+        assert.deepStrictEqual(actual, [
+            [0, 1, 2],
+            [3, 4, 5],
+        ]);
+    });
+
+    it('should return the last chunk as remaining elements', () => {
+        const actual = chunk(array, 4);
+        assert.deepStrictEqual(actual, [
+            [0, 1, 2, 3],
+            [4, 5],
+        ]);
+    });
+
+    it('should treat falsey `size` values, except `undefined`, as `0`', () => {
+        const expected = lodashStable.map(falsey, (value) =>
+            value === undefined ? [[0], [1], [2], [3], [4], [5]] : [],
+        );
+
+        const actual = lodashStable.map(falsey, (size, index) =>
+            index ? chunk(array, size) : chunk(array),
+        );
+
+        expect(actual).toEqual(expected);
+    });
+
+    it('should ensure the minimum `size` is `0`', () => {
+        const values = lodashStable.reject(falsey, lodashStable.isUndefined).concat(-1, -Infinity);
+        const expected = lodashStable.map(values, stubArray);
+
+        const actual = lodashStable.map(values, (n) => chunk(array, n));
+
+        expect(actual).toEqual(expected);
+    });
+
+    it('should coerce `size` to an integer', () => {
+        expect(chunk(array, array.length / 4), [[0], [1], [2], [3], [4]).toEqual([5]]);
+    });
+});