wip: code formatting nits continued

test/flatMapDepth.spec.js

@@ -0,0 +1,32 @@
+import lodashStable from 'lodash';
+import { identity } from './utils';
+import flatMapDepth from '../src/flatMapDepth';
+
+describe('flatMapDepth', () => {
+    const array = [1, [2, [3, [4]], 5]];
+
+    it('should use a default `depth` of `1`', () => {
+        expect(flatMapDepth(array, identity), [1, 2, [3, [4]]).toEqual(5]);
+    });
+
+    it('should use `_.identity` when `iteratee` is nullish', () => {
+        const values = [, null, undefined];
+        const expected = lodashStable.map(values, lodashStable.constant([1, 2, [3, [4]], 5]));
+
+        const actual = lodashStable.map(values, (value, index) =>
+            index ? flatMapDepth(array, value) : flatMapDepth(array),
+        );
+
+        expect(actual).toEqual(expected);
+    });
+
+    it('should treat a `depth` of < `1` as a shallow clone', () => {
+        lodashStable.each([-1, 0], (depth) => {
+            expect(flatMapDepth(array, identity, depth), [1, [2, [3, [4]]).toEqual(5]]);
+        });
+    });
+
+    it('should coerce `depth` to an integer', () => {
+        expect(flatMapDepth(array, identity, 2.2), [1, 2, 3, [4]).toEqual(5]);
+    });
+});