add test cases

Author: eryue0220

server/utils/import-resolver.ts

@@ -321,7 +321,12 @@ export function resolveInternalImport(
 ): ResolvedImport | null {
   const cleanSpecifier = specifier.replace(/^['"]|['"]$/g, '').trim()
 
-  if ((!cleanSpecifier.startsWith('#') && !cleanSpecifier.startsWith('~')) || !imports) {
+  if (
+    (!cleanSpecifier.startsWith('#') &&
+      !cleanSpecifier.startsWith('~') &&
+      !cleanSpecifier.startsWith('@')) ||
+    !imports
+  ) {
     return null
   }
 

test/unit/server/utils/import-resolver.spec.ts

@@ -191,7 +191,7 @@ describe('createImportResolver', () => {
   })
 })
 
-describe('resolveInternalSpecifier', () => {
+describe('resolveInternalImport', () => {
   it('resolves exact imports map matches to files in the package', () => {
     const files = new Set<string>(['dist/app/nuxt.js'])
 
@@ -238,17 +238,62 @@ describe('resolveInternalSpecifier', () => {
   })
 
   it('resolves prefix matches with extension resolution via guessInternalImportTarget', () => {
-    const files = new Set<string>(['dist/app/nuxt.js'])
+    const files = new Set<string>(['dist/app/components/button.js'])
 
     const resolved = resolveInternalImport(
-      '#app/nuxt',
+      '#app/components/button.js',
       'dist/index.js',
       {
         '#app': './dist/app/index.js',
       },
       files,
     )
 
-    expect(resolved?.path).toBe('dist/app/nuxt.js')
+    expect(resolved?.path).toBe('dist/app/components/button.js')
+  })
+
+  it('resolves file that could not found in the files', () => {
+    const files = new Set<string>(['dist/app/index.js'])
+
+    const resolved = resolveInternalImport(
+      '#app/components/button.js',
+      'dist/index.js',
+      {
+        '#app': './dist/app/index.js',
+      },
+      files,
+    )
+
+    expect(resolved).toBeNull()
+  })
+
+  it('resolves file that prefix is "~/"', () => {
+    const files = new Set<string>(['dist/app/components/button.js'])
+
+    const resolved = resolveInternalImport(
+      '~/app/components/button.js',
+      'dist/index.js',
+      {
+        '~/app': './dist/app/index.js',
+      },
+      files,
+    )
+
+    expect(resolved?.path).toBe('dist/app/components/button.js')
+  })
+
+  it('resolves file that prefix is "@/"', () => {
+    const files = new Set<string>(['dist/app/components/button.js'])
+
+    const resolved = resolveInternalImport(
+      '@/app/components/button.js',
+      'dist/index.js',
+      {
+        '@/app': './dist/app/index.js',
+      },
+      files,
+    )
+
+    expect(resolved?.path).toBe('dist/app/components/button.js')
   })
 })