wip: code formatting nits continued

test/after.spec.js

@@ -0,0 +1,41 @@
+import lodashStable from 'lodash';
+import after from '../src/after';
+
+describe('after', () => {
+    function testAfter(n, times) {
+        let count = 0;
+        lodashStable.times(
+            times,
+            after(n, () => {
+                count++;
+            }),
+        );
+        return count;
+    }
+
+    it('should create a function that invokes `func` after `n` calls', () => {
+        // 'after(n) should invoke `func` after being called `n` times'
+        expect(testAfter(5, 5)).toBe(1);
+        // 'after(n) should not invoke `func` before being called `n` times'
+        expect(testAfter(5, 4)).toBe(0);
+        // 'after(0) should not invoke `func` immediately'
+        expect(testAfter(0, 0)).toBe(0);
+        // 'after(0) should invoke `func` when called once'
+        expect(testAfter(0, 1)).toBe(1);
+    });
+
+    it('should coerce `n` values of `NaN` to `0`', () => {
+        expect(testAfter(NaN, 1)).toBe(1);
+    });
+
+    it('should use `this` binding of function', () => {
+        const afterFn = after(1, function () {
+            return ++this.count;
+        });
+        const object = { after: afterFn, count: 0 };
+
+        object.after();
+        expect(object.after()).toBe(2);
+        expect(object.count).toBe(2);
+    });
+});