Merge pull request #58 from lihongxun945/feat/raf-interval

feat: 增加rafInterval

__test__/time/rafInterval.test.ts

@@ -0,0 +1,50 @@
+import { time } from '../../src/index';
+
+const { setRAFInterval, cancelRAFInterval: cancelRequestInterval } = time;
+
+describe('RequestInterval', () => {
+    jest.useFakeTimers('modern');
+    test('setRequestInterval, cancelRequestInterval should be defined', () => {
+        expect(setRAFInterval).toBeDefined();
+        expect(cancelRequestInterval).toBeDefined();
+    });
+    test('should do nothing with undefined callback', () => {
+        // @ts-ignore
+        const id = setRAFInterval(undefined, 100);
+        expect(typeof id.id).toEqual(typeof 1);
+        cancelRequestInterval(id);
+    });
+    test('should work when delay is undefined', () => {
+        const callback = jest.fn();
+        const id = setRAFInterval(callback);
+        expect(callback).not.toBeCalled();
+        jest.advanceTimersByTime(50);
+        expect(callback).toHaveBeenCalled();
+        cancelRequestInterval(id);
+    });
+    test('should not call until time is up', () => {
+        const callback = jest.fn();
+        const id = setRAFInterval(callback, 100);
+        expect(callback).not.toBeCalled();
+        jest.advanceTimersByTime(200);
+        expect(callback).toHaveBeenCalledTimes(1);
+        cancelRequestInterval(id);
+    });
+    test('should call 3 times', () => {
+        const callback = jest.fn();
+        const id = setRAFInterval(callback, 100);
+        expect(callback).not.toBeCalled();
+        jest.advanceTimersByTime(350);
+        expect(callback).toHaveBeenCalledTimes(3);
+        cancelRequestInterval(id);
+    });
+    test('cancelRequestInterval should work', () => {
+        const callback = jest.fn();
+        const id = setRAFInterval(callback, 100);
+        jest.advanceTimersByTime(150);
+        expect(callback).toHaveBeenCalledTimes(1);
+        cancelRequestInterval(id);
+        jest.advanceTimersByTime(200);
+        expect(callback).toHaveBeenCalledTimes(1);
+    });
+});