@covers PHPUnit_Framework_Assert::assertJsonStringEqualsJsonString
public function testAssertJsonStringEqualsJsonString() {
$expected = '{"Mascott" : "Tux"}';
$actual = '{"Mascott" : "Tux"}';
$message = 'Given Json strings do not match';
$this
->assertJsonStringEqualsJsonString($expected, $actual, $message);
}