added unit test for media constraint obj

Co-authored-by: Louis Disen <[email protected]>

lib/__tests__/unit/mediaStreamConstraints.unit.test.ts

@@ -0,0 +1,19 @@
+'use strict';
+import constraints from '../../src/constants/mediaStreamConstraints';
+
+describe('Check mediaStreamConstraints object', () => {
+  const testConstraints = {
+    video: {
+      width: { min:640, ideal:1920, max:1920 },
+      height: { min:480, ideal:1080, max:1080 },
+    },
+    // audio: true
+    audio: {
+      echoCancellation: true
+    }
+  };
+
+  test('Check all constraint values', () => {
+    expect(constraints).toMatchObject(testConstraints);
+  });
+});