algorithms/tests/Property/PropertyGraphTest.php at b2fb6a8fa86e0d69badda9dcd0fb5abbc068c3ff · graphp/algorithms · GitHub

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
<?php

use Fhaculty\Graph\Graph;
use Graphp\Algorithms\Property\GraphProperty;

class PropertyGraphTest extends TestCase
{
    public function testEmptyIsEdgeless()
    {
        $graph = new Graph();

        $alg = new GraphProperty($graph);

        $this->assertTrue($alg->isNull());
        $this->assertTrue($alg->isEdgeless());
        $this->assertFalse($alg->isTrivial());
        $this->assertTrue($alg->isAcyclic());
    }

    public function testSingleVertexIsTrivial()
    {
        $graph = new Graph();
        $graph->createVertex(1);

        $alg = new GraphProperty($graph);

        $this->assertFalse($alg->isNull());
        $this->assertTrue($alg->isEdgeless());
        $this->assertTrue($alg->isTrivial());
        $this->assertTrue($alg->isAcyclic());
    }

    public function testUndirectedIsAcyclic()
    {
        $graph = new Graph();
        $graph->createVertex(1)->createEdge($graph->createVertex(2));

        $alg = new GraphProperty($graph);

        $this->assertFalse($alg->isNull());
        $this->assertFalse($alg->isEdgeless());
        $this->assertFalse($alg->isTrivial());
        $this->assertFalse($alg->isAcyclic());
    }

    public function testGraphSimpleIsAcyclic()
    {
        $graph = new Graph();
        $graph->createVertex(1)->createEdgeTo($graph->createVertex(2));

        $alg = new GraphProperty($graph);

        $this->assertFalse($alg->isNull());
        $this->assertFalse($alg->isEdgeless());
        $this->assertFalse($alg->isTrivial());
        $this->assertTrue($alg->isAcyclic());
    }

    public function testGraphWithCycleIsAcyclic()
    {
        $graph = new Graph();
        $vertexOne = $graph->createVertex(1);
        $vertexTwo = $graph->createVertex(2);
        $vertexThree = $graph->createVertex(3);
        $vertexOne->createEdgeTo($vertexTwo);
        $vertexTwo->createEdgeTo($vertexThree);
        $vertexThree->createEdgeTo($vertexOne);

        $alg = new GraphProperty($graph);

        $this->assertFalse($alg->isNull());
        $this->assertFalse($alg->isEdgeless());
        $this->assertFalse($alg->isTrivial());
        $this->assertFalse($alg->isAcyclic());
    }
}