public function testToStringMethodReturnsExpectedResult()
{
$x = 123.4;
$y = 456.7;
$z = 789.1;
$instance = new CartesianCoordinate($x, $y, $z, $this->datumFactory->createDefault());
$expected = "{$x}, {$y}, {$z}";
$this->assertEquals($expected, $instance->toString());
}
