test: add semantic tokens test

Author: serkodev

packages/language-server/tests/semanticTokens.spec.ts

@@ -0,0 +1,49 @@
+import type { TextDocument } from '@volar/language-server';
+import { afterEach, expect, test } from 'vitest';
+import { URI } from 'vscode-uri';
+import { getLanguageServer, testWorkspacePath } from './server.js';
+
+const openedDocuments: TextDocument[] = [];
+
+afterEach(async () => {
+	const server = await getLanguageServer();
+	for (const document of openedDocuments) {
+		await server.close(document.uri);
+	}
+	openedDocuments.length = 0;
+});
+
+test('#5572 semantic tokens stay in sync when a git view is opened', async () => {
+	const server = await getLanguageServer();
+	const fileContent = `
+<script setup lang="ts">
+defineProps({
+    foo: { type: String },
+});
+</script>
+	`;
+	const fileUri = URI.file(`${testWorkspacePath}/semanticTokens.vue`);
+
+	const document = await prepareDocument(fileUri, 'vue', fileContent);
+	const tokensBefore = (await server.vueserver.sendSemanticTokensRequest(document.uri))!.data;
+
+	// simlulate open git diff view
+	const gitUri = URI.from({ scheme: 'git', path: fileUri.path });
+	await prepareDocument(gitUri, 'vue', fileContent.replace('foo', 'fooooooo'));
+
+	const tokensAfter = (await server.vueserver.sendSemanticTokensRequest(document.uri))!.data;
+
+	expect(tokensAfter).toEqual(tokensBefore);
+});
+
+async function prepareDocument(uriOrFileName: string | URI, languageId: string, content: string) {
+	const server = await getLanguageServer();
+	const uri = typeof uriOrFileName === 'string'
+		? URI.file(`${testWorkspacePath}/${uriOrFileName}`)
+		: uriOrFileName;
+	const document = await server.open(uri.toString(), languageId, content);
+	if (openedDocuments.every(d => d.uri !== document.uri)) {
+		openedDocuments.push(document);
+	}
+	return document;
+}