tabs 组件修改 (#18)

* 修改tab tabs内部交互逻辑

packages/tab/src/tab.vue

@@ -15,12 +15,21 @@
       },
       disabled: Boolean
     },
-    beforeCreate() {
-      this.$parent.tabs.push(this);
+    data() {
+      const nextIndex = this.$parent.tabs.length;
+      this.$parent.tabs.push({
+        title: this.title,
+        disabled: this.disabled,
+        index: nextIndex
+      });
+
+      return {
+        key: nextIndex
+      };
     },
     computed: {
       classNames() {
-        return { 'van-tab__pane--select': this.$parent.tabs.indexOf(this) === this.$parent.curActive };
+        return { 'van-tab__pane--select': this.key === this.$parent.curActive };
       }
     }
   };

test/unit/components/tabs.vue

@@ -1,5 +1,5 @@
 <template>
-  <van-tabs :active="active">
+  <van-tabs :active="active" @click="handleTabClick" @disabled="handleTabDisabledClick">
     <van-tab title="选项一">内容一</van-tab>
     <van-tab title="选项二">内容二</van-tab>
     <van-tab title="选项三" disabled>内容三</van-tab>
@@ -22,6 +22,15 @@ export default {
     return {
       active: 0
     };
+  },
+
+  methods: {
+    handleTabClick(index) {
+      this.$emit('click');
+    },
+    handleTabDisabledClick(index) {
+      this.$emit('disabled');
+    }
   }
 };
 </script>

test/unit/specs/tabs.spec.js

@@ -36,4 +36,36 @@ describe('Tabs', () => {
       done();
     });
   });
+
+  it('listen click event', (done) => {
+    wrapper = mount(TabsTestComponent, {
+      attachToDocument: true
+    });
+
+    const clickSpy = sinon.spy();
+    wrapper.vm.$on('click', clickSpy);
+
+    wrapper.vm.$nextTick(() => {
+      const nTab = wrapper.find('.van-tab')[0];
+      nTab.simulate('click');
+      expect(clickSpy.calledOnce).to.be.true;
+      done();
+    });
+  });
+
+  it('listen click disable event', (done) => {
+    wrapper = mount(TabsTestComponent, {
+      attachToDocument: true
+    });
+
+    const clickDisabledSpy = sinon.spy();
+    wrapper.vm.$on('disabled', clickDisabledSpy);
+
+    wrapper.vm.$nextTick(() => {
+      const nTab = wrapper.find('.van-tab')[2];
+      nTab.simulate('click');
+      expect(clickDisabledSpy.calledOnce).to.be.true;
+      done();
+    });
+  });
 });