/**
* Tests whether the declaration of dependencies directly on the nodes works correctly
* and the dependencies are detected by the graph.
*
* @test
*/
public function testDeclarationOnNodes()
{
$graph = new DependencyGraph();
$nodeA = new DependencyNode('A');
$nodeB = new DependencyNode('B');
$nodeC = new DependencyNode('C');
$nodeD = new DependencyNode('D');
$nodeE = new DependencyNode('E');
$nodeA->dependsOn($nodeB);
$nodeA->dependsOn($nodeD);
$nodeB->dependsOn($nodeC);
$nodeB->dependsOn($nodeE);
$nodeC->dependsOn($nodeD);
$nodeC->dependsOn($nodeE);
$graph->addNode($nodeA);
$dependencies = $graph->getDependencies();
$this->assertEquals(array($nodeB, $nodeD), $dependencies[$nodeA]->getArrayCopy());
$this->assertEquals(array($nodeC, $nodeE), $dependencies[$nodeB]->getArrayCopy());
$this->assertEquals(array($nodeD, $nodeE), $dependencies[$nodeC]->getArrayCopy());
$this->assertEquals(array(), $dependencies[$nodeD]->getArrayCopy());
$this->assertEquals(array(), $dependencies[$nodeE]->getArrayCopy());
}
