Merge VS Code 1.23.1 (#1520)

build/lib/test/util.test.ts

@@ -0,0 +1,79 @@
+/*---------------------------------------------------------------------------------------------
+ *  Copyright (c) Microsoft Corporation. All rights reserved.
+ *  Licensed under the Source EULA. See License.txt in the project root for license information.
+ *--------------------------------------------------------------------------------------------*/
+
+import assert = require('assert');
+import util = require('../util');
+
+function getMockTagExists(tags: string[]) {
+	return (tag: string) => tags.indexOf(tag) >= 0;
+}
+
+suite('util tests', () => {
+	test('getPreviousVersion - patch', () => {
+		assert.equal(
+			util.getPreviousVersion('1.2.3', getMockTagExists(['1.2.2', '1.2.1', '1.2.0', '1.1.0'])),
+			'1.2.2'
+		);
+	});
+
+	test('getPreviousVersion - patch invalid', () => {
+		try {
+			util.getPreviousVersion('1.2.2', getMockTagExists(['1.2.0', '1.1.0']));
+		} catch (e) {
+			// expected
+			return;
+		}
+
+		throw new Error('Expected an exception');
+	});
+
+	test('getPreviousVersion - minor', () => {
+		assert.equal(
+			util.getPreviousVersion('1.2.0', getMockTagExists(['1.1.0', '1.1.1', '1.1.2', '1.1.3'])),
+			'1.1.3'
+		);
+
+		assert.equal(
+			util.getPreviousVersion('1.2.0', getMockTagExists(['1.1.0', '1.0.0'])),
+			'1.1.0'
+		);
+	});
+
+	test('getPreviousVersion - minor gap', () => {
+		assert.equal(
+			util.getPreviousVersion('1.2.0', getMockTagExists(['1.1.0', '1.1.1', '1.1.3'])),
+			'1.1.1'
+		);
+	});
+
+	test('getPreviousVersion - minor invalid', () => {
+		try {
+			util.getPreviousVersion('1.2.0', getMockTagExists(['1.0.0']));
+		} catch (e) {
+			// expected
+			return;
+		}
+
+		throw new Error('Expected an exception');
+	});
+
+	test('getPreviousVersion - major', () => {
+		assert.equal(
+			util.getPreviousVersion('2.0.0', getMockTagExists(['1.0.0', '1.1.0', '1.2.0', '1.2.1', '1.2.2'])),
+			'1.2.2'
+		);
+	});
+
+	test('getPreviousVersion - major invalid', () => {
+		try {
+			util.getPreviousVersion('3.0.0', getMockTagExists(['1.0.0']));
+		} catch (e) {
+			// expected
+			return;
+		}
+
+		throw new Error('Expected an exception');
+	});
+});