test: fix plugin test

jest.config.js

@@ -1,6 +1,6 @@
 module.exports = {
   moduleFileExtensions: ['js', 'mjs', 'ts'],
-  collectCoverageFrom: ['src/runtime/**/*.{js,ts}', '!src/**/*.d.ts'],
+  collectCoverageFrom: ['src/runtime/**/*.{js,ts}', '!src/**/*.d.ts', '!src/runtime/plugin.ts'],
   moduleNameMapper: {
     '^@/(.*)': '<rootDir>/$1',
     '#app': '<rootDir>/node_modules/nuxt/dist/app/index.mjs',

src/runtime/plugin-impl.ts

@@ -0,0 +1,27 @@
+import { computed } from 'vue';
+import { useHead } from '#head';
+
+export default (nuxtApp) => {
+  const mixin = {
+    created() {
+      if (typeof this.$options?.jsonld !== 'function') {
+        return;
+      }
+      const jsonComputed = computed(() => this.$options.jsonld.call(this));
+      useHead(() => ({
+        script: [
+          {
+            type: 'application/ld+json',
+            children: jsonComputed.value ? JSON.stringify(jsonComputed.value, null, '') : undefined,
+          },
+        ],
+      }));
+    },
+  };
+  const plugin = {
+    install(Vue) {
+      Vue.mixin(mixin);
+    },
+  };
+  nuxtApp.vueApp.use(plugin);
+};

src/runtime/plugin.ts

@@ -1,28 +1,4 @@
-import { computed } from 'vue';
 import { defineNuxtPlugin } from '#app';
-import { useHead } from '#head';
+import plugin from './plugin-impl';
 
-export default defineNuxtPlugin((nuxtApp) => {
-  const mixin = {
-    created() {
-      if (typeof this.$options?.jsonld !== 'function') {
-        return;
-      }
-      const jsonComputed = computed(() => this.$options.jsonld.call(this));
-      useHead(() => ({
-        script: [
-          {
-            type: 'application/ld+json',
-            children: jsonComputed.value ? JSON.stringify(jsonComputed.value, null, '') : undefined,
-          },
-        ],
-      }));
-    },
-  };
-  const plugin = {
-    install(Vue) {
-      Vue.mixin(mixin);
-    },
-  };
-  nuxtApp.vueApp.use(plugin);
-});
+export default defineNuxtPlugin(plugin);

test/plugin.spec.js

@@ -1,4 +1,4 @@
-import plugin from '../src/runtime/plugin';
+import plugin from '../src/runtime/plugin-impl';
 
 let useHeadArg = undefined;
 jest.mock('#head', () => ({