diff --git a/.jest.config.js b/.jest.config.js
index 4b4fe9f..9203df8 100644
--- a/.jest.config.js
+++ b/.jest.config.js
@@ -12,9 +12,11 @@ module.exports = {
   },
   
   testRegex: '.*\\.test\\.(j|t)sx?$',
+  // testRegex: 'button\\/.*\\.test\\.(j|t)sx?$',
   
   collectCoverageFrom: [
     'components/**/*.{ts,tsx}',
+    '!components/**/styles.{ts,tsx}',
     '!components/styles/*',
     '!components/index.ts',
   ],
diff --git a/components/button/__tests__/__snapshots__/index.test.tsx.snap b/components/button/__tests__/__snapshots__/index.test.tsx.snap
new file mode 100644
index 0000000..91307fa
--- /dev/null
+++ b/components/button/__tests__/__snapshots__/index.test.tsx.snap
@@ -0,0 +1,33 @@
+// Jest Snapshot v1, https://goo.gl/fbAQLP
+
+exports[`Button should render empty button correctly 1`] = `
+<Memo
+  auto={false}
+  className=""
+  disabled={false}
+  effect={true}
+  ghost={false}
+  loading={false}
+  shadow={false}
+  size="medium"
+  type="default"
+/>
+`;
+
+exports[`Button should render special styles 1`] = `ReactWrapper {}`;
+
+exports[`Button should render special styles 2`] = `
+<Memo
+  auto={false}
+  className=""
+  disabled={false}
+  effect={true}
+  ghost={false}
+  loading={true}
+  shadow={false}
+  size="medium"
+  type="default"
+>
+  button
+</Memo>
+`;
diff --git a/components/button/__tests__/index.test.tsx b/components/button/__tests__/index.test.tsx
new file mode 100644
index 0000000..67facfc
--- /dev/null
+++ b/components/button/__tests__/index.test.tsx
@@ -0,0 +1,128 @@
+import React from 'react'
+import { mount } from 'enzyme'
+import { Button } from '../../'
+import { sleep } from '../../../tests/utils'
+
+describe('Button', () => {
+  it('should render correctly', () => {
+    const wrapper = mount(<Button>Button</Button>)
+    expect(() => wrapper.unmount()).not.toThrow()
+  })
+  
+  it('should support all types', () => {
+    const wrapper = mount(
+      <div>
+        <Button type="secondary" />
+        <Button type="success" />
+        <Button type="warning" />
+        <Button type="error" />
+        <Button type="abort" />
+      </div>
+    )
+    expect(() => wrapper.unmount()).not.toThrow()
+  })
+  
+  it('should support all sizes', () => {
+    const wrapper = mount(
+      <div>
+        <Button size="mini" />
+        <Button size="small" />
+        <Button size="medium" />
+        <Button size="large" />
+      </div>
+    )
+    expect(() => wrapper.unmount()).not.toThrow()
+  })
+  
+  it('should render different text', () => {
+    const wrapper = mount(<Button>button</Button>)
+    expect(wrapper.text()).toContain('button')
+    
+    wrapper.setProps({
+      children: <span>按钮</span>,
+    })
+    expect(wrapper.text()).toContain('按钮')
+  })
+  
+  it('should render empty button correctly', () => {
+    expect(<Button></Button>).toMatchSnapshot()
+  })
+  
+  it('should trigger callback function', () => {
+    const WrapperButton = () => {
+      const [state, setState] = React.useState<string>('state1')
+      return (
+        <Button onClick={() => setState('state2')}>
+          {state}
+        </Button>
+      )
+    }
+    const wrapper = mount(<WrapperButton />)
+    expect(wrapper.text()).toContain('state1')
+    
+    wrapper.simulate('click')
+    expect(wrapper.text()).toContain('state2')
+  })
+  
+  it('should ignore events when disabled', () => {
+    const WrapperButton = () => {
+      const [state, setState] = React.useState<string>('state1')
+      return (
+        <Button disabled onClick={() => setState('state2')}>
+          {state}
+        </Button>
+      )
+    }
+    const wrapper = mount(<WrapperButton />)
+    expect(wrapper.text()).toContain('state1')
+  
+    wrapper.simulate('click')
+    expect(wrapper.text()).toContain('state1')
+    expect(wrapper.text()).not.toContain('state2')
+  })
+  
+  it('should ignore events when loading', () => {
+    const WrapperButton = () => {
+      const [state, setState] = React.useState<string>('state1')
+      return (
+        <Button loading onClick={() => setState('state2')}>
+          {state}
+        </Button>
+      )
+    }
+    const wrapper = mount(<WrapperButton />)
+    wrapper.simulate('click')
+    expect(wrapper.text()).not.toContain('state2')
+  })
+  
+  it('should render special styles', () => {
+    const wrapper = mount(
+      <div>
+        <Button ghost>button</Button>
+        <Button ghost type="success">button</Button>
+        <Button ghost type="warning">button</Button>
+        <Button ghost loading>button</Button>
+        <Button shadow>button</Button>
+        <Button auto>button</Button>
+        <Button effect={false}>button</Button>
+      </div>
+    )
+    expect(wrapper).toMatchSnapshot()
+    expect(<Button loading>button</Button>).toMatchSnapshot()
+  })
+  
+  it('should remove expired events', () => {
+    const wrapper = mount(<Button>button</Button>)
+    wrapper.simulate('click')
+    expect(() => wrapper.unmount()).not.toThrow()
+  })
+  
+  it('should support loading change with deply', async () => {
+    const wrapper = mount(<Button>button</Button>)
+    wrapper.simulate('click')
+    await sleep(500)
+    wrapper.setProps({ loading: true })
+    await sleep(500)
+    expect(wrapper.find('.loading-container').length).not.toBe(0)
+  })
+})
diff --git a/components/button/button.drip.tsx b/components/button/button.drip.tsx
index 7494a78..7dab48c 100644
--- a/components/button/button.drip.tsx
+++ b/components/button/button.drip.tsx
@@ -2,8 +2,8 @@ import React, { useEffect, useRef } from 'react'
 import withDefaults from '../utils/with-defaults'
 
 interface Props {
-  x?: number
-  y?: number
+  x: number
+  y: number
   color?: string
   onCompleted?: Function
 }
@@ -20,10 +20,17 @@ const ButtonDrip: React.FC<ButtonDrip> = React.memo(({
   x, y, color, onCompleted
 }) => {
   const dripRef = useRef<HTMLDivElement>(null)
+  /* istanbul ignore next */
+  const top = Number.isNaN(+y) ? 0 : y - 10
+  /* istanbul ignore next */
+  const left = Number.isNaN(+x) ? 0 : x - 10
+  
   useEffect(() => {
+    /* istanbul ignore next */
     if (!dripRef.current) return
     dripRef.current.addEventListener('animationend', onCompleted)
     return () => {
+      /* istanbul ignore next */
       if (!dripRef.current) return
       dripRef.current.removeEventListener('animationend', onCompleted)
     }
@@ -32,7 +39,7 @@ const ButtonDrip: React.FC<ButtonDrip> = React.memo(({
   return (
     <div ref={dripRef} className="drip">
       <svg width="20" height="20" viewBox="0 0 20 20"
-        style={{ top: y - 10, left: x - 10 }}>
+        style={{ top, left }}>
         <g stroke="none" strokeWidth="1" fill="none" fillRule="evenodd">
           <g fill={color}><rect width="100%" height="100%" rx="10" /></g>
         </g>
diff --git a/components/button/button.tsx b/components/button/button.tsx
index 0b26c4c..a96aef9 100644
--- a/components/button/button.tsx
+++ b/components/button/button.tsx
@@ -60,6 +60,7 @@ const Button: React.FC<React.PropsWithChildren<ButtonProps>> = React.memo(({
     [size, auto],
   )
   
+  /* istanbul ignore next */
   const dripCompletedHandle = () => {
     setDripShow(false)
     setDripX(0)
@@ -69,6 +70,7 @@ const Button: React.FC<React.PropsWithChildren<ButtonProps>> = React.memo(({
   const clickHandler = (event: MouseEvent<HTMLButtonElement>) => {
     if (disabled || loading) return
     const showDrip = !shadow && !ghost && effect
+    /* istanbul ignore next */
     if (showDrip && buttonRef.current) {
       const rect = buttonRef.current.getBoundingClientRect()
       setDripShow(true)
diff --git a/package.json b/package.json
index 860fc85..d5b0bd0 100644
--- a/package.json
+++ b/package.json
@@ -48,6 +48,7 @@
     }
   },
   "devDependencies": {
+    "@babel/plugin-transform-runtime": "^7.9.0",
     "@babel/preset-typescript": "^7.8.3",
     "@mapbox/rehype-prism": "^0.4.0",
     "@mdx-js/loader": "^1.5.7",
diff --git a/tests/.babelrc.js b/tests/.babelrc.js
index 00046a6..851024a 100644
--- a/tests/.babelrc.js
+++ b/tests/.babelrc.js
@@ -1,4 +1,4 @@
 module.exports = {
   presets: ['@babel/preset-env', '@babel/preset-react', '@babel/preset-typescript'],
-  plugins: ['styled-jsx/babel-test'],
+  plugins: ['styled-jsx/babel-test', '@babel/plugin-transform-runtime'],
 }
diff --git a/tests/utils.ts b/tests/utils.ts
new file mode 100644
index 0000000..f1cca33
--- /dev/null
+++ b/tests/utils.ts
@@ -0,0 +1,3 @@
+export const sleep = (time: number) => {
+  return new Promise(resolve => setTimeout(resolve, time))
+}
diff --git a/yarn.lock b/yarn.lock
index e134eca..efb026a 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -865,6 +865,16 @@
     resolve "^1.8.1"
     semver "^5.5.1"
 
+"@babel/plugin-transform-runtime@^7.9.0":
+  version "7.9.0"
+  resolved "https://registry.yarnpkg.com/@babel/plugin-transform-runtime/-/plugin-transform-runtime-7.9.0.tgz#45468c0ae74cc13204e1d3b1f4ce6ee83258af0b"
+  integrity sha512-pUu9VSf3kI1OqbWINQ7MaugnitRss1z533436waNXp+0N3ur3zfut37sXiQMxkuCF4VUjwZucen/quskCh7NHw==
+  dependencies:
+    "@babel/helper-module-imports" "^7.8.3"
+    "@babel/helper-plugin-utils" "^7.8.3"
+    resolve "^1.8.1"
+    semver "^5.5.1"
+
 "@babel/plugin-transform-shorthand-properties@^7.2.0":
   version "7.8.3"
   resolved "https://registry.yarnpkg.com/@babel/plugin-transform-shorthand-properties/-/plugin-transform-shorthand-properties-7.8.3.tgz#28545216e023a832d4d3a1185ed492bcfeac08c8"