test: stub color mode helper (#229)

Author: danielroe

test/nuxt/setup.ts

@@ -0,0 +1,26 @@
+/**
+ * Global setup for Nuxt vitest environment.
+ *
+ * This file stubs globals that are normally initialized by inline scripts
+ * injected into the HTML document, which don't run in vitest's nuxt environment.
+ */
+
+// Stub the @nuxtjs/color-mode global helper
+// The color-mode module injects a script that initializes this on window,
+// but in vitest the script never runs since the HTML page isn't SSR'd.
+// See: https://github.com/nuxt-modules/color-mode/issues/335
+if (typeof window !== 'undefined') {
+  const globalName = '__NUXT_COLOR_MODE__'
+
+  // @ts-expect-error - dynamic global name
+  if (!window[globalName]) {
+    // @ts-expect-error - dynamic global name
+    window[globalName] = {
+      preference: 'system',
+      value: 'dark',
+      getColorScheme: () => 'dark',
+      addColorScheme: () => {},
+      removeColorScheme: () => {},
+    }
+  }
+}

vitest.config.ts

@@ -25,6 +25,7 @@ export default defineConfig({
           name: 'nuxt',
           include: ['test/nuxt/**/*.{test,spec}.ts'],
           environment: 'nuxt',
+          setupFiles: ['./test/nuxt/setup.ts'],
           environmentOptions: {
             nuxt: {
               rootDir: fileURLToPath(new URL('.', import.meta.url)),
@@ -59,6 +60,7 @@ export default defineConfig({
         'shared/utils/spdx.ts',
         'shared/utils/url.ts',
         'server/utils/readme.ts',
+        'server/utils/docs/text.ts',
         'server/utils/code-highlight.ts',
         'server/utils/npm.ts',
         'server/utils/shiki.ts',