test(a-button): 增加 NewBtn 测试

__tests__/NewBtn.js

@@ -0,0 +1,21 @@
+import {NewBtn} from '../';
+import {MemoryRouter} from 'react-router';
+import {render} from '@testing-library/react';
+
+describe('NewBtn', () => {
+  test('default', () => {
+    const {container} = render(<MemoryRouter>
+      <NewBtn href="foo">bar</NewBtn>
+    </MemoryRouter>);
+
+    expect(container).toMatchSnapshot();
+  });
+
+  test('text', () => {
+    const {container} = render(<MemoryRouter>
+      <NewBtn data-testid="foo" href="foo">bar</NewBtn>
+    </MemoryRouter>);
+
+    expect(container).toMatchSnapshot();
+  });
+});

__tests__/__snapshots__/NewBtn.js.snap

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+// Jest Snapshot v1, https://goo.gl/fbAQLP
+
+exports[`NewBtn default 1`] = `
+<div>
+  <a
+    class="ant-btn ant-btn-success"
+    href="foo"
+  >
+    <span>
+      bar
+    </span>
+  </a>
+</div>
+`;
+
+exports[`NewBtn text 1`] = `
+<div>
+  <a
+    class="ant-btn ant-btn-success"
+    data-testid="foo"
+    href="foo"
+  >
+    <span>
+      bar
+    </span>
+  </a>
+</div>
+`;