test: slightly improve coverage

packages/nuxt/src/components/plugins/component-names.ts

@@ -18,6 +18,7 @@ export const ComponentNamePlugin = (options: NameDevPluginOptions) => createUnpl
     name: 'nuxt:component-name-plugin',
     enforce: 'post',
     transformInclude (id) {
+      /* v8 ignore next 2 */
       return isVue(id) || !!id.match(SX_RE)
     },
     transform (code, id) {
@@ -53,6 +54,7 @@ export const ComponentNamePlugin = (options: NameDevPluginOptions) => createUnpl
         return {
           code: s.toString(),
           map: options.sourcemap
+            /* v8 ignore next */
             ? s.generateMap({ hires: true })
             : undefined,
         }

packages/nuxt/test/component-names.test.ts

@@ -6,13 +6,34 @@ import * as Parser from 'acorn'
 import { ComponentNamePlugin } from '../src/components/plugins/component-names'
 
 describe('component names', () => {
-  const components = [{
-    filePath: 'test.ts',
-    pascalName: 'TestMe',
-  }] as [Component]
+  const components = [
+    {
+      filePath: 'test.ts',
+      pascalName: 'TestMe',
+    },
+    {
+      filePath: 'test.vue',
+      pascalName: 'TestMe',
+    },
+  ] as [Component, Component]
 
   const transformPlugin = ComponentNamePlugin({ sourcemap: false, getComponents: () => components }).raw({}, {} as any) as { transform: (code: string, id: string) => { code: string } | null }
 
+  it('should ignore files without extension', () => {
+    const res = transformPlugin.transform('export default {}', 'test')
+    expect(res?.code).toBeUndefined()
+  })
+
+  it('should ignore files that are not components ', () => {
+    const res = transformPlugin.transform('export default {}', 'some-other-file.ts')
+    expect(res?.code).toBeUndefined()
+  })
+
+  it('should process simple default exports', () => {
+    const res = transformPlugin.transform('export default {}', 'test.vue')
+    expect(res?.code).toMatchInlineSnapshot(`"export default Object.assign({}, { __name: "TestMe" })"`)
+  })
+
   it('should add correct default component names', () => {
     const sfc = `
 <script setup>