public function testGetModelChanges()
{
$model = new ModelState();
$this->assertEquals([], $model->getModelChanges());
$model->A = 1;
$model->B = 2;
$this->assertEquals(["A" => 1, "B" => 2], $model->getModelChanges());
$model->takeChangeSnapshot();
$this->assertEquals([], $model->getModelChanges());
$model->A = 2;
$this->assertEquals(["A" => 2], $model->getModelChanges());
}
public function testGetModelChanges()
{
$model = new ModelState();
$this->assertEquals([], $model->getModelChanges());
$model->A = 1;
$model->B = 2;
$model->C = null;
$this->assertEquals(["A" => 1, "B" => 2], $model->getModelChanges());
$model->takeChangeSnapshot();
$this->assertEquals([], $model->getModelChanges());
$model->A = 2;
$this->assertEquals(["A" => 2], $model->getModelChanges());
$model->takeChangeSnapshot();
// Ensure that setting a value that is not set to null results in no change
$model->C = null;
$this->assertEquals([], $model->getModelChanges());
$model->C = 3;
$model->takeChangeSnapshot();
// Remove C by setting to null
$model->C = null;
$this->assertEquals(['C' => null], $model->getModelChanges());
$model->takeChangeSnapshot();
$model->C = 3;
$model->takeChangeSnapshot();
// Remove C via unset
unset($model->C);
$this->assertEquals(['C' => null], $model->getModelChanges());
}
