[unit] 定义更多button测试用例

test/unit/specs/button.spec.js

@@ -21,4 +21,46 @@ describe('Button.vue', () => {
     expect(vm.$el.tagName).to.equal('BUTTON');
     done();
   });
+
+  it('handle with `type` attribute', done => {
+    // should render with `type` attribute
+    // if it is a <button>
+    vm = createVue(`
+      <Button htmlType="reset">Think in FE</Button>
+    `);
+    expect(vm.$el.getAttribute('type')).to.equal('reset');
+
+    // should't render with `type` attribute
+    // if it is a <button>
+    vm = createVue(`
+      <Button to="http://www.thinkinfe.tech/" htmlType="reset">Think in FE</Button>
+    `);
+    expect(vm.$el.getAttribute('type')).to.equal(null);
+    done();
+  });
+
+  it('should change loading state', done => {
+    vm = createVue({
+        template: `
+            <Button :loading="loading" @click="fetch">Think in FE</Button>
+        `,
+        data() {
+            return {loading: false};
+        },
+        methods: {
+            fetch() {
+                this.loading = true;
+            }
+        }
+    });
+    vm.$el.click();
+    vm.$nextTick(() => {
+      expect(vm.$el.classList.contains('ivu-btn-loading')).to.equal(true);
+      const $icons = vm.$el.querySelectorAll('.ivu-icon');
+      expect($icons.length).to.equal(1);
+      expect($icons[0].classList.contains('ivu-load-loop')).to.equal(true);
+      expect($icons[0].classList.contains('ivu-icon-ios-loading')).to.equal(true);
+      done();
+    });
+  });
 });