refactor: make sure setupContext.emit always reference current emit on instance

yyx990803 · yyx990803 · commit 5968cff3a8ac · 2020-04-13T10:06:51.000-04:00
This is dev only and for internal use by vue-test-utils.
diff --git a/packages/runtime-core/src/component.ts b/packages/runtime-core/src/component.ts
@@ -517,7 +517,7 @@ function createSetupContext(instance: ComponentInternalInstance): SetupContext {
         return new Proxy(instance.slots, slotsHandlers)
       },
       get emit() {
-        return instance.emit
+        return (event: string, ...args: any[]) => instance.emit(event, ...args)
       }
     })
   } else {

Original file line number	Diff line number	Diff line change
`@@ -517,7 +517,7 @@ function createSetupContext(instance: ComponentInternalInstance): SetupContext {`
`517`	`517`	`return new Proxy(instance.slots, slotsHandlers)`
`518`	`518`	`},`
`519`	`519`	`get emit() {`
`520`		`- return instance.emit`
	`520`	`+ return (event: string, ...args: any[]) => instance.emit(event, ...args)`
`521`	`521`	`}`
`522`	`522`	`})`
`523`	`523`	`} else {`