test: improve coverage

packages/compiler-core/src/codegen.ts

@@ -374,8 +374,8 @@ function genNode(node: CodegenNode, context: CodegenContext) {
     case NodeTypes.JS_SLOT_FUNCTION:
       genSlotFunction(node, context)
       break
+    /* istanbul ignore next */
     default:
-      /* istanbul ignore if */
       if (__DEV__) {
         assert(false, `unhandled codegen node type: ${(node as any).type}`)
         // make sure we exhaust all possible types

packages/compiler-core/src/index.ts

@@ -22,6 +22,7 @@ export function baseCompile(
   template: string | RootNode,
   options: CompilerOptions = {}
 ): CodegenResult {
+  /* istanbul ignore if */
   if (__BROWSER__) {
     const onError = options.onError || defaultOnError
     if (options.prefixIdentifiers === true) {