@dataProvider validInvalidJsonDataprovider @covers PHPUnit_Framework_Assert::assertJsonStringEqualsJsonString
public function testAssertJsonStringEqualsJsonStringErrorRaised($expected, $actual) {
  try {
    $this
      ->assertJsonStringEqualsJsonString($expected, $actual);
  } catch (PHPUnit_Framework_AssertionFailedError $e) {
    return;
  }
  $this
    ->fail('Expected exception not found');
}