Merge pull request #954 from microsoft/benibenj/testAdded

Add test for invalid version format

Author: benibenj

src/test/validation.test.ts

@@ -72,6 +72,7 @@ describe('validateVersion', () => {
 		assert.throws(() => validateVersion('.0.1'));
 		assert.throws(() => validateVersion('0.1.'));
 		assert.throws(() => validateVersion('0.0.0.1'));
+		assert.throws(() => validateVersion('1.0.a'));
 	});
 });