wip: code formatting nits continued

test/delay.spec.js

@@ -0,0 +1,81 @@
+import { slice } from './utils';
+import delay from '../src/delay';
+
+describe('delay', () => {
+    it('should delay `func` execution', (done) => {
+        let pass = false;
+        delay(() => {
+            pass = true;
+        }, 32);
+
+        setTimeout(() => {
+            expect(pass).toBe(false)
+        }, 1);
+
+        setTimeout(() => {
+            expect(pass)
+            done();
+        }, 64);
+    });
+
+    it('should provide additional arguments to `func`', (done) => {
+        let args;
+
+        delay(
+            function () {
+                args = slice.call(arguments);
+            },
+            32,
+            1,
+            2,
+        );
+
+        setTimeout(() => {
+            expect(args, [1).toEqual(2]);
+            done();
+        }, 64);
+    });
+
+    it('should use a default `wait` of `0`', (done) => {
+        let pass = false;
+        delay(() => {
+            pass = true;
+        });
+
+        expect(pass).toBe(false)
+
+        setTimeout(() => {
+            expect(pass)
+            done();
+        }, 0);
+    });
+
+    it('should be cancelable', (done) => {
+        let pass = true;
+        const timerId = delay(() => {
+            pass = false;
+        }, 32);
+
+        clearTimeout(timerId);
+
+        setTimeout(() => {
+            expect(pass)
+            done();
+        }, 64);
+    });
+
+    it('should work with mocked `setTimeout`', () => {
+        let pass = false;
+        const setTimeout = root.setTimeout;
+
+        setProperty(root, 'setTimeout', (func) => {
+            func();
+        });
+        delay(() => {
+            pass = true;
+        }, 32);
+        setProperty(root, 'setTimeout', setTimeout);
+
+        expect(pass)
+    });
+});