How to access extension in tests?

[eschricker]

I am using @vscode/test-cli but I am unable to access my extension in the tests. As a minimal example, the helloworld-test-cli-sample can be used. If I add the following test in extension.test.ts:

	test('Test for command', async () => {
		const commands = await vscode.commands.getCommands(true);
		assert.ok(commands.includes('extension.helloWorld'), 'Command ID not found in the registered commands');
	});

I get an error stating that the command is not found. I ran the tests via npm test. What am I doing wrong that prevents me from accessing the extension within the tests?

[alefragnani]

Hi @eschricker ,

I'm not an expert in testing extensions, but I have a few tests on my extensions. For your use case, as a startup, I guess you only need to get the extension.

Add this to the test suite. A reference to an extension, which is filled in the suiteSetup.

suite('Extension Test Suite', () => {
    vscode.window.showInformationMessage('Start all tests.');

    // add below code
    let extension: vscode.Extension<any>;
    suiteSetup(() => {
        extension = vscode.extensions.getExtension('vscode-samples.helloworld-sample') as vscode.Extension<any>;
    });

    test('Activation test', async () => {
        await extension.activate();
        assert.strictEqual(extension.isActive, true);
    });

On the other hand, if you need to interact with your commands and so on, take a look at one of my extensions (https://github.com/alefragnani/vscode-copy-word/blob/master/src/test/suite/commands.test.ts). It is a simple extension, fairly easy to build and run.

Hope this helps