1 files changed, 43 insertions, 0 deletions
diff --git a/client/src/test/completion.test.ts b/client/src/test/completion.test.ts
new file mode 100644
index 0000000..f355078
--- /dev/null
+++ b/client/src/test/completion.test.ts
@@ -0,0 +1,43 @@
+/* --------------------------------------------------------------------------------------------
+ * Copyright (c) Microsoft Corporation. All rights reserved.
+ * Licensed under the MIT License. See License.txt in the project root for license information.
+ * ------------------------------------------------------------------------------------------ */
+
+import * as vscode from 'vscode';
+import * as assert from 'assert';
+import { getDocUri, activate } from './helper';
+
+suite('Should do completion', () => {
+	const docUri = getDocUri('completion.txt');
+
+	test('Completes JS/TS in txt file', async () => {
+		await testCompletion(docUri, new vscode.Position(0, 0), {
+			items: [
+				{ label: 'JavaScript', kind: vscode.CompletionItemKind.Text },
+				{ label: 'TypeScript', kind: vscode.CompletionItemKind.Text }
+			]
+		});
+	});
+});
+
+async function testCompletion(
+	docUri: vscode.Uri,
+	position: vscode.Position,
+	expectedCompletionList: vscode.CompletionList
+) {
+	await activate(docUri);
+
+	// Executing the command `vscode.executeCompletionItemProvider` to simulate triggering completion
+	const actualCompletionList = (await vscode.commands.executeCommand(
+		'vscode.executeCompletionItemProvider',
+		docUri,
+		position
+	)) as vscode.CompletionList;
+
+	assert.ok(actualCompletionList.items.length >= 2);
+	expectedCompletionList.items.forEach((expectedItem, i) => {
+		const actualItem = actualCompletionList.items[i];
+		assert.equal(actualItem.label, expectedItem.label);
+		assert.equal(actualItem.kind, expectedItem.kind);
+	});
+}