feat(eventBus): 补充返回 id 示例及测试

pages/API/event-bus/event-bus.test.js

@@ -77,4 +77,13 @@ describe('event-bus', () => {
     const l3 = (await page.data()).log.length
     expect(l3).toBe(0)
   })
+  it('test return id', async () => {
+    await page.callMethod('clear')
+    expect((await page.data()).log.length).toBe(0)
+    await page.callMethod('testReturnId')
+    const logs = await page.data('log')
+    expect(logs.length).toBe(2)
+    expect(logs[0]).toBe('触发 test-return-id $on fn')
+    expect(logs[1]).toBe('触发 test-return-id $once fn')
+  })
 })

pages/API/event-bus/event-bus.uvue

@@ -20,6 +20,7 @@
           <text>接收到的 obj 参数：</text>
           <text>{{JSON.stringify(objArg)}}</text>
         </view>
+        <button @click="testReturnId">测试返回 id</button>
       </view>
     </view>
   <!-- #ifdef APP -->
@@ -71,6 +72,19 @@
       clear() {
         this.log.length = 0
       },
+      testReturnId(){
+        const id1 = uni.$on('test-return-id', this.fn)
+        uni.$emit('test-return-id', '触发 test-return-id $on fn')
+        uni.$off('test-return-id', id1)
+        uni.$emit('test-return-id', '触发 test-return-id $on fn')
+
+        uni.$once('test-return-id', this.fn)
+        uni.$emit('test-return-id', '触发 test-return-id $once fn')
+        uni.$emit('test-return-id', '触发 test-return-id $once fn')
+        const id2 = uni.$once('test-id', this.fn)
+        uni.$off('test-return-id', id2)
+        uni.$emit('test-return-id', '触发 test-return-id $once fn')
+      }
     },
   }
 </script>
@@ -79,4 +93,4 @@
   .box {
     padding: 10px;
   }
-</style>
+</style>