test(spinner): add testcase

components/spinner/__tests__/index.test.tsx

@@ -0,0 +1,24 @@
+import React from 'react'
+import { mount } from 'enzyme'
+import { Spinner } from 'components'
+
+describe('Spacer', () => {
+  it('should render correctly', () => {
+    const wrapper = mount(<Spinner />)
+    expect(wrapper.html()).toMatchSnapshot()
+    expect(() => wrapper.unmount()).not.toThrow()
+  })
+  
+  it('should work with different sizes', () => {
+    const wrapper = mount(
+      <div>
+        <Spinner size="mini" />
+        <Spinner size="small" />
+        <Spinner size="medium" />
+        <Spinner size="large" />
+      </div>
+    )
+    expect(wrapper.html()).toMatchSnapshot()
+    expect(() => wrapper.unmount()).not.toThrow()
+  })
+})