Merge pull request #545 from QingWei-Li/test/badge

Badge: add test

test/unit/specs/badge.spec.js

+import { createTest, createVue } from '../util';
+import Badge from 'packages/badge';
+
+describe('Badge', () => {
+  it('value', () => {
+    expect(createTest(Badge, { value: 80 }).content).to.equal(80);
+  });
+
+  it('is fixed', () => {
+    const vm = createVue(`
+      <el-badge>
+        <button>click</button>
+      </el-badge>
+    `);
+
+    expect(vm.$el.querySelector('.el-badge__content.is-fixed')).to.exist;
+  });
+
+  it('is dot', () => {
+    const vm = createVue(`
+      <el-badge is-dot>
+        <button>click</button>
+      </el-badge>
+    `);
+
+    expect(vm.$el.querySelector('.el-badge__content.is-dot')).to.exist;
+  });
+
+  it('max', () => {
+    expect(createTest(Badge, { max: 100, value: 200 }).content).to.equal('100+');
+    expect(createTest(Badge, { max: 100, value: 80 }).content).to.equal(80);
+  });
+});