// remove sensitive data
const hashData = (xs, y) => R.mapObjIndexed((x, key) => key.includes(y) ? '******' : x, xs);

// tests
    describe('hashData', () => {
      it('should hash out sensitive information as expected', async () => {
        // given ... object that includes sensitive information
        const sensitiveObject = {
          username: 'john',
          password: 'my-super-secret-password',
        };

        // when ... we run the hashData function providing which data to hash
        const result = SUT.hashData(sensitiveObject, ['password']);

        // then ... returned data should be as expected
        const expectedResult = {
          username: 'john',
          password: '******',
        };

        assert.deepEqual(result, expectedResult);
      });
    });