add tests for utility method

Author: Hweinstock

packages/core/src/test/shared/utilities/tsUtils.test.ts

@@ -0,0 +1,16 @@
+/*!
+ * Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+import { partition } from '../../../shared/utilities/tsUtils'
+import assert from 'assert'
+
+describe('partition', function () {
+    it('should split the list according to predicate', function () {
+        const items = [1, 2, 3, 4, 5, 6, 7, 8]
+        const [even, odd] = partition(items, (i) => i % 2 === 0)
+        assert.deepStrictEqual(even, [2, 4, 6, 8])
+        assert.deepStrictEqual(odd, [1, 3, 5, 7])
+    })
+})