diff --git a/components/icon/__tests__/index.test.js b/components/icon/__tests__/index.test.js
index 0cf96cf073..ab73daf488 100644
--- a/components/icon/__tests__/index.test.js
+++ b/components/icon/__tests__/index.test.js
@@ -1,6 +1,7 @@
 import React from 'react';
 import { render } from 'enzyme';
 import Icon from '..';
+import { getThemeFromTypeName, withThemeSuffix } from '../utils';
 
 describe('Icon', () => {
   it('should render to a <i class="xxx"><svg>...</svg></i>', () => {
@@ -148,3 +149,33 @@ describe('Icon.createFromIconfontCN()', () => {
     expect(wrapper).toMatchSnapshot();
   });
 });
+
+describe('utils', () => {
+  it('getThemeFromTypeName() should work', () => {
+    const testCases = ['check-circle', 'check-circle-o', 'check-circle-fill', 'check-circle-twotone'];
+    const result = testCases.map(type => getThemeFromTypeName(type));
+    expect(result).toEqual(
+      [null, 'outlined', 'filled', 'twoTone']
+    );
+  });
+
+  it('withThemeSuffix() should work', () => {
+    const testCases = [
+      { type: 'home', theme: 'filled' },
+      { type: 'home', theme: 'outlined' },
+      { type: 'home', theme: 'twoTone' },
+      { type: 'home', theme: 'This-is-the-secret' },
+      { type: 'home-o', theme: 'filled' },
+      { type: 'home-fill', theme: 'outlined' },
+      { type: 'home-o', theme: 'twoTone' },
+      { type: 'home-o', theme: 'This-is-the-secret' },
+    ];
+    const result = testCases.map(({ type, theme }) => withThemeSuffix(type, theme));
+    expect(result).toEqual(
+      [
+        'home-fill', 'home-o', 'home-twotone', 'home',
+        'home-o', 'home-fill', 'home-o', 'home-o',
+      ]
+    );
+  });
+});