test(affix): add tests and remove unnecessary judgments

packages/components/affix/Affix.tsx

@@ -50,10 +50,10 @@ const Affix = forwardRef<AffixRef, AffixProps>((props, ref) => {
         const calcBottom = containerToTop + containerHeight - (offsetBottom ?? 0); // 计算 bottom 相对应的 top 值
 
         let fixedTop: number | false;
-        if (offsetTop !== undefined && calcTop <= offsetTop) {
+        if (calcTop <= offsetTop) {
           // top 的触发
           fixedTop = containerToTop + offsetTop;
-        } else if (offsetBottom !== undefined && wrapToTop >= calcBottom) {
+        } else if (wrapToTop >= calcBottom) {
           // bottom 的触发
           fixedTop = calcBottom;
         } else {

packages/components/affix/__tests__/affix.test.tsx

@@ -5,11 +5,23 @@ import Affix from '../index';
 describe('Affix 组件测试', () => {
   const mockFn = vi.spyOn(HTMLDivElement.prototype, 'getBoundingClientRect');
   const mockScrollTo = async (top: number) => {
-    mockFn.mockImplementation(() => ({ top, bottom: 0 }));
+    mockFn.mockImplementation(() => ({
+      top,
+      bottom: 0,
+      left: 0,
+      right: 0,
+      height: 0,
+      width: 0,
+      x: 0,
+      y: 0,
+      toJSON: () => ({}),
+    }));
   };
+
   beforeEach(async () => {
     await mockScrollTo(0);
   });
+
   test('render perfectly', async () => {
     const { queryByText } = render(
       <Affix>
@@ -19,24 +31,115 @@ describe('Affix 组件测试', () => {
 
     expect(queryByText('固钉')).toBeInTheDocument();
   });
-  test('offsetTop and onFixedChange and zIndex', async () => {
+
+  test('className', async () => {
+    const { container } = render(
+      <Affix className="custom-class-name">
+        <div>固钉</div>
+      </Affix>,
+    );
+
+    const affixElement = container.querySelector('.custom-class-name');
+    expect(affixElement).not.toBeNull();
+    expect(affixElement?.className).toContain('custom-class-name');
+  });
+
+  test('style', async () => {
+    const { container } = render(
+      <Affix style={{ background: 'red' }} className="custom-class-name">
+        <div>固钉</div>
+      </Affix>,
+    );
+    const affixElement = container.querySelector('.custom-class-name');
+    expect(affixElement).not.toBeNull();
+    expect((affixElement as HTMLElement)?.style.background).toBe('red');
+  });
+
+  test('content', async () => {
+    const Children = () => <div>固钉</div>;
+    const { queryByText } = render(<Affix content={<Children />} />);
+    expect(queryByText('固钉')).toBeInTheDocument();
+  });
+
+  test('offsetTop trigger onFixedChange and zIndex', async () => {
+    const onFixedChangeMock = vi.fn();
+
+    const { getByText } = render(
+      <Affix offsetTop={20} onFixedChange={onFixedChangeMock} zIndex={2}>
+        <div>固钉</div>
+      </Affix>,
+    );
+    // 默认
+    expect(onFixedChangeMock).toHaveBeenCalledTimes(0);
+    expect(getByText('固钉').parentNode).not.toHaveClass('t-affix');
+    expect(getByText('固钉').parentElement?.style.zIndex).toBe('');
+
+    // offsetTop
+    await mockScrollTo(30);
+    await mockScrollTo(10);
+    await mockTimeout(() => false, 200);
+    expect(onFixedChangeMock).toHaveBeenCalledTimes(1);
+
+    expect(getByText('固钉').parentNode).toHaveClass('t-affix');
+    expect(getByText('固钉').parentElement?.style.zIndex).toBe('2');
+  });
+
+  test('offsetBottom  trigger onFixedChange and zIndex', async () => {
     const onFixedChangeMock = vi.fn();
 
     const { getByText } = render(
-      <Affix offsetTop={-1} onFixedChange={onFixedChangeMock} zIndex={2}>
+      <Affix offsetBottom={20} onFixedChange={onFixedChangeMock} zIndex={2}>
         <div>固钉</div>
       </Affix>,
     );
+    // 默认
+    expect(onFixedChangeMock).toHaveBeenCalledTimes(0);
+    expect(getByText('固钉').parentNode).not.toHaveClass('t-affix');
+    expect(getByText('固钉').parentElement?.style.zIndex).toBe('');
+
+    // offsetBottom
+    const isWindow = getByText('固钉').parentElement && window instanceof Window;
+    const { clientHeight } = document.documentElement;
+    const { innerHeight } = window;
+    await mockScrollTo((isWindow ? innerHeight : clientHeight) - 40);
+    await mockScrollTo(isWindow ? innerHeight : clientHeight);
+    await mockTimeout(() => false, 200);
+    expect(onFixedChangeMock).toHaveBeenCalledTimes(1);
+
+    expect(getByText('固钉').parentNode).toHaveClass('t-affix');
+    expect(getByText('固钉').parentElement?.style.zIndex).toBe('2');
+  });
+
+  test('offsetTop and offsetBottom trigger onFixedChange and zIndex', async () => {
+    const onFixedChangeMock = vi.fn();
 
-    expect(onFixedChangeMock).toBeCalledTimes(0);
+    const { getByText } = render(
+      <Affix offsetBottom={20} offsetTop={20} onFixedChange={onFixedChangeMock} zIndex={2}>
+        <div>固钉</div>
+      </Affix>,
+    );
+    // 默认
+    expect(onFixedChangeMock).toHaveBeenCalledTimes(0);
     expect(getByText('固钉').parentNode).not.toHaveClass('t-affix');
-    expect(getByText('固钉').parentElement.style.zIndex).toBe('');
+    expect(getByText('固钉').parentElement?.style.zIndex).toBe('');
 
-    await mockScrollTo(-10);
+    // offsetTop
+    await mockScrollTo(30);
+    await mockScrollTo(10);
+    await mockTimeout(() => false, 200);
+    expect(onFixedChangeMock).toHaveBeenCalledTimes(1);
 
+    //  offsetBottom
+    const isWindow = typeof window !== 'undefined' && window.innerHeight !== undefined;
+    const { clientHeight } = document.documentElement;
+    const { innerHeight } = window;
+    await mockScrollTo((isWindow ? innerHeight : clientHeight) - 40);
+    await mockScrollTo(isWindow ? innerHeight : clientHeight);
     await mockTimeout(() => false, 200);
+
     expect(onFixedChangeMock).toHaveBeenCalledTimes(1);
+
     expect(getByText('固钉').parentNode).toHaveClass('t-affix');
-    expect(getByText('固钉').parentElement.style.zIndex).toBe('2');
+    expect(getByText('固钉').parentElement?.style.zIndex).toBe('2');
   });
 });