chore: add test for alias path definition

#1555

packages/vue-language-service/tests/definitions/alias_path.ts

@@ -0,0 +1,10 @@
+import * as path from 'upath';
+import { Position } from 'vscode-languageserver-protocol';
+import { defineDefinition } from '../utils/defineDefinition';
+
+const file = path.resolve(__dirname, '../../../vue-test-workspace/definitions/alias_path/B.vue');
+
+defineDefinition({
+	fileName: file,
+	position: Position.create(1, 15),
+}, ['/definitions/alias_path/A.vue']);

packages/vue-language-service/tests/index.spec.ts

@@ -3,6 +3,8 @@ import { defineTypeCheck } from './utils/defineTypeCheck';
 
 import './completions/import_path';
 
+import './definitions/alias_path';
+
 import './renames/prop';
 import './renames/typeProp';
 import './renames/cssModules';

packages/vue-language-service/tests/utils/defineDefinition.ts

@@ -0,0 +1,29 @@
+import type * as vscode from 'vscode-languageserver-protocol';
+import { describe, expect, it } from 'vitest';
+import * as path from 'upath';
+import { tester } from './createTester';
+import * as shared from '@volar/shared';
+
+const volarRoot = path.resolve(__dirname, '../../../..');
+
+export function defineDefinition(action: {
+	fileName: string,
+	position: vscode.Position,
+}, expectedResults: string[]) {
+
+	const fileName = action.fileName;
+	const uri = shared.fsPathToUri(fileName);
+	const location = `${path.relative(volarRoot, fileName)}:${action.position.line + 1}:${action.position.character + 1}`;
+
+	describe(`find definition ${path.basename(fileName)} ${location}`, async () => {
+		const result = await tester.languageService.findDefinition(
+			uri,
+			{ line: action.position.line, character: action.position.character },
+		);
+		for (const expectedResult of expectedResults) {
+			it(`has ${expectedResult}`, () => {
+				expect(result?.some(item => item.targetUri.endsWith(expectedResult))).toEqual(true);
+			});
+		}
+	});
+}

packages/vue-test-workspace/definitions/alias_path/A.vue

@@ -0,0 +1 @@
+<script setup lang="ts"></script>

packages/vue-test-workspace/definitions/alias_path/B.vue

@@ -0,0 +1,7 @@
+<script setup lang="ts">
+import A from '@/../definitions/alias_path/A.vue';
+</script>
+
+<template>
+	<A></A>
+</template>

packages/vue-test-workspace/tsconfig.json

@@ -10,9 +10,16 @@
 		"noUnusedParameters": true,
 		"skipLibCheck": true,
 		"jsx": "preserve",
+		"baseUrl": ".",
+		"paths": {
+			"@/": [
+				"./*"
+			]
+		}
 	},
 	"include": [
 		"completions/**/*",
+		"definitions/**/*",
 		"renames/**/*",
 		"typeChecks/**/*",
 		"typeChecks/**/*.html",