facebook / php-graph-sdk

        $this->assertInstanceOf(\DateTime::class, $graphNodeAsArray['created_time']);

    }

    public function testGettingAGraphNodeAsAStringWillSafelyRepresentDateTimes()

    {

        $graphNode = new GraphNode([

            'id' => '123',

            'created_time' => '2014-07-15T03:44:53+0000',

        ]);

        $graphNodeAsString = (string) $graphNode;

        $this->assertEquals('{"id":"123","created_time":"2014-07-15T03:44:53+0000"}', $graphNodeAsString);

    }

    public function testAnExistingFieldCanBeAccessed()

    {

        $this->assertEquals(['field1', 'field2', 'field3'], $fieldNames);

    }

    public function testAGraphNodeCanBeConvertedToAString()

    {

        $graphNode = new GraphNode(['foo', 'bar', 123]);

        $graphNodeAsString = (string) $graphNode;

        $this->assertEquals('["foo","bar",123]', $graphNodeAsString);

    }

}