@Test public void toString_nonNullValueAsParam_returnObjectToStringValue() {

  // Given
  final Object objectA = new Object() {
    @Override public String toString() {
      return "notNull";
    }
  };
  // When
  final String nonNullString = Objects.toString(objectA);
  // Then
  assertThat(nonNullString, is(nonNullString));
  assertThat(nonNullString, is("notNull"));
}