Multi-step input API (#49340)

extensions/vscode-api-tests/src/singlefolder-tests/window.test.ts

@@ -405,6 +405,84 @@ suite('window namespace tests', () => {
 		return Promise.all([a, b]);
 	});
 
+	test('multiStepInput, two steps', async function () {
+		const picks = window.multiStepInput(async (input, token) => {
+			const pick1 = input.showQuickPick(['eins', 'zwei', 'drei']);
+			await commands.executeCommand('workbench.action.acceptSelectedQuickOpenItem');
+			assert.equal(await pick1, 'eins');
+
+			const pick2 = input.showQuickPick(['vier', 'fünf', 'sechs']);
+			await commands.executeCommand('workbench.action.acceptSelectedQuickOpenItem');
+			assert.equal(await pick2, 'vier');
+
+			return [ await pick1, await pick2 ];
+		});
+		assert.deepEqual(await picks, ['eins', 'vier']);
+	});
+
+	test('multiStepInput, interrupted by showQuickPick', async function () {
+		const picks = window.multiStepInput(async (input, token) => {
+			const pick1 = input.showQuickPick(['eins', 'zwei', 'drei']);
+			await commands.executeCommand('workbench.action.acceptSelectedQuickOpenItem');
+			assert.equal(await pick1, 'eins');
+
+			assert.ok(!token.isCancellationRequested);
+			const otherPick = window.showQuickPick(['sieben', 'acht', 'neun']);
+			await commands.executeCommand('workbench.action.acceptSelectedQuickOpenItem');
+			assert.equal(await otherPick, 'sieben');
+			assert.ok(token.isCancellationRequested);
+
+			const pick2 = input.showQuickPick(['vier', 'fünf', 'sechs']);
+			await commands.executeCommand('workbench.action.acceptSelectedQuickOpenItem');
+			assert.equal(await pick2, undefined);
+
+			return [ await pick1, await pick2 ];
+		});
+		assert.deepEqual(await picks, ['eins', undefined]);
+	});
+
+	test('multiStepInput, interrupted by multiStepInput', async function () {
+		const picks = window.multiStepInput(async (input, token) => {
+			const pick1 = input.showQuickPick(['eins', 'zwei', 'drei']);
+			await commands.executeCommand('workbench.action.acceptSelectedQuickOpenItem');
+			assert.equal(await pick1, 'eins');
+
+			assert.ok(!token.isCancellationRequested);
+			const otherPick = window.multiStepInput(async (input, token) => {
+				const otherPick = window.showQuickPick(['sieben', 'acht', 'neun']);
+				await commands.executeCommand('workbench.action.acceptSelectedQuickOpenItem');
+				assert.equal(await otherPick, 'sieben');
+
+				return otherPick;
+			});
+			assert.equal(await otherPick, 'sieben');
+			assert.ok(token.isCancellationRequested);
+
+			const pick2 = input.showQuickPick(['vier', 'fünf', 'sechs']);
+			await commands.executeCommand('workbench.action.acceptSelectedQuickOpenItem');
+			assert.equal(await pick2, undefined);
+
+			return [ await pick1, await pick2 ];
+		});
+		assert.deepEqual(await picks, ['eins', undefined]);
+	});
+
+	test('multiStepInput, interrupted by error', async function () {
+		try {
+			const picks = window.multiStepInput(async (input, token) => {
+				const pick1 = input.showQuickPick(['eins', 'zwei', 'drei']);
+				await commands.executeCommand('workbench.action.acceptSelectedQuickOpenItem');
+				assert.equal(await pick1, 'eins');
+
+				throw new Error('because');
+			});
+			await picks;
+			assert.ok(false);
+		} catch (error) {
+			assert.equal(error.message, 'because');
+		}
+	});
+
 	test('showWorkspaceFolderPick', function () {
 		const p = window.showWorkspaceFolderPick(undefined);
 

extensions/vscode-api-tests/src/typings/ref.d.ts

@@ -4,4 +4,5 @@
  *--------------------------------------------------------------------------------------------*/
 
 /// <reference path="../../../../src/vs/vscode.d.ts" />
+/// <reference path="../../../../src/vs/vscode.proposed.d.ts" />
 /// <reference types='@types/node'/>