Fhaculty\Graph\Tests\WalkTest::testWalkWithinGraph PHP Method

    public function testWalkWithinGraph()
    {
        // 1 -- 2 -- 3
        $graph = new Graph();
        $v1 = $graph->createVertex(1);
        $v2 = $graph->createVertex(2);
        $v3 = $graph->createVertex(3);
        $e1 = $v1->createEdgeTo($v2);
        $e2 = $v2->createEdgeTo($v3);
        // construct partial walk "1 -- 2"
        $walk = Walk::factoryFromEdges(array($e1), $v1);
        $this->assertEquals(2, count($walk->getVertices()));
        $this->assertEquals(1, count($walk->getEdges()));
        $this->assertSame($v1, $walk->getVertices()->getVertexFirst());
        $this->assertSame($v2, $walk->getVertices()->getVertexLast());
        $this->assertSame(array($v1, $e1, $v2), $walk->getAlternatingSequence());
        $this->assertTrue($walk->isValid());
        $graphExpected = new Graph();
        $graphExpected->createVertex(1)->createEdgeTo($graphExpected->createVertex(2));
        $this->assertGraphEquals($graphExpected, $walk->createGraph());
        // construct same partial walk "1 -- 2"
        $walkVertices = Walk::factoryFromVertices(array($v1, $v2));
        $this->assertEquals(2, count($walkVertices->getVertices()));
        $this->assertEquals(1, count($walkVertices->getEdges()));
        $this->assertGraphEquals($graphExpected, $walkVertices->createGraph());
        return $walk;
    }