Merge from vscode 1df23554b2e3d5f1efc6fbc76ee61d3f7f186c6d

src/vs/base/test/common/hash.test.ts

@@ -3,7 +3,7 @@
  *  Licensed under the Source EULA. See License.txt in the project root for license information.
  *--------------------------------------------------------------------------------------------*/
 import * as assert from 'assert';
-import { hash } from 'vs/base/common/hash';
+import { hash, StringSHA1 } from 'vs/base/common/hash';
 
 suite('Hash', () => {
 	test('string', () => {
@@ -53,4 +53,28 @@ suite('Hash', () => {
 		assert.notEqual(a, b);
 	});
 
+	function checkSHA1(strings: string[], expected: string) {
+		const hash = new StringSHA1();
+		for (const str of strings) {
+			hash.update(str);
+		}
+		const actual = hash.digest();
+		assert.equal(actual, expected);
+	}
+
+	test('sha1-1', () => {
+		checkSHA1(['\udd56'], '9bdb77276c1852e1fb067820472812fcf6084024');
+	});
+
+	test('sha1-2', () => {
+		checkSHA1(['\udb52'], '9bdb77276c1852e1fb067820472812fcf6084024');
+	});
+
+	test('sha1-3', () => {
+		checkSHA1(['\uda02ꑍ'], '9b483a471f22fe7e09d83f221871a987244bbd3f');
+	});
+
+	test('sha1-4', () => {
+		checkSHA1(['hello'], 'aaf4c61ddcc5e8a2dabede0f3b482cd9aea9434d');
+	});
 });