Add tests for --help

src/vs/code/test/node/argv.test.ts

@@ -0,0 +1,41 @@
+/*---------------------------------------------------------------------------------------------
+ *  Copyright (c) Microsoft Corporation. All rights reserved.
+ *  Licensed under the MIT License. See License.txt in the project root for license information.
+ *--------------------------------------------------------------------------------------------*/
+'use strict';
+
+import assert = require('assert');
+import {formatOptions} from 'vs/code/node/argv';
+
+suite('formatOptions', () => {
+	test('Text should display small columns correctly', () => {
+		assert.equal(formatOptions({'foo': 'bar'}, 80), '  foo bar');
+		assert.equal(
+			formatOptions({
+				'f': 'bar',
+				'fo': 'ba',
+				'foo': 'b'
+			}, 80),
+			'  f   bar\n' +
+			'  fo  ba\n' +
+			'  foo b');
+	});
+
+	test('Text should wrap', () => {
+		assert.equal(
+			formatOptions({
+				'foo': (<any>'bar ').repeat(9)
+			}, 40),
+				'  foo bar bar bar bar bar bar bar bar\n' +
+				'      bar');
+	});
+
+	test('Text should revert to the condensed view when the terminal is too narrow', () => {
+		assert.equal(
+			formatOptions({
+				'foo': (<any>'bar ').repeat(9)
+			}, 30),
+				'  foo\n' +
+				'      bar bar bar bar bar bar bar bar bar ');
+	});
+});