lithium\tests\cases\storage\session\strategy\HmacTest::testReadWithInvalidSignature PHP Method

    public function testReadWithInvalidSignature()
    {
        $class = $this->mock;
        $currentData = MockCookieSession::data();
        $signature = 'some_invalid_signature';
        $result = MockCookieSession::write('__signature', $signature);
        $this->assertEqual($signature, $result);
        $value = 'data_read_that_wont_match_signature';
        $expected = '/Possible data tampering: HMAC signature does not match data./';
        $hmac = $this->Hmac;
        $this->assertException($expected, function () use($hmac, $value, $class) {
            $hmac->read($value, compact('class'));
        });
    }