补充测试用例

pages/component/button/buttonstatus.uvue

@@ -123,11 +123,17 @@
       </button>
     </view>
     <view class="container">
-       <button style="margin: 10px;position: relative;text-align: center;padding:5px;color: #ffffff;background-color: #1AAD19;
+       <button style="margin: 10px;position: relative;text-align:left;padding:5px;color: #ffffff;background-color: #1AAD19;
         font-size: 10px;line-height: 2;">
          custom-btn
        </button>
      </view>
+      <view class="container">
+         <button style="margin: 10px;
+           font-size: 15px;color: red;" type="warn" plain="true">
+           custom-btn-plain-warn
+         </button>
+       </view>
   </view>
 </template>