/**
  * @test
  */
 public function to_string_also_mentions_the_expected_exception_message()
 {
     $expectedMessage = 'the expected message';
     $constraint = new ConfigurationValuesAreInvalidConstraint(new AlwaysValidConfiguration(), $expectedMessage);
     $expectedResult = 'is invalid for the given configuration (expected exception message: ' . $expectedMessage . ')';
     $this->assertSame($expectedResult, $constraint->toString());
 }