public function testMergeTwoBags()
{
$propertyA1 = new Property('username', 'alice');
$propertyA2 = new Property('owner', 'bob');
$propertyB1 = new Property('username', 'mad');
// overlapping value
$propertyB2 = new Property('mail', '[email protected]');
$bagA = (new PropertyBag())->with($propertyA1)->with($propertyA2);
$bagB = (new PropertyBag())->with($propertyB1)->with($propertyB2);
$bag = $bagA->mergeWith($bagB);
$this->assertInstanceOf(PropertyBag::class, $bag);
$this->assertSame(['username' => $propertyA1, 'owner' => $propertyA2], $this->propRefl->getValue($bagA));
$this->assertSame(['username' => $propertyB1, 'mail' => $propertyB2], $this->propRefl->getValue($bagB));
$this->assertSame(['username' => $propertyA1, 'mail' => $propertyB2, 'owner' => $propertyA2], $this->propRefl->getValue($bag));
}
