Add tests with 100% coverage for Algorithm\Groups

Author: clue

tests/GroupsTest.php

@@ -0,0 +1,62 @@
+<?php
+
+use Fhaculty\Graph\Algorithm\Groups as AlgorithmGroups;
+use Fhaculty\Graph\Graph;
+
+class GroupsTest extends TestCase
+{
+    public function testGraphEmpty()
+    {
+        $graph = new Graph();
+
+        $alg = new AlgorithmGroups($graph);
+
+        $this->assertEquals(array(), $alg->getGroups());
+        $this->assertEquals(0, $alg->getNumberOfGroups());
+
+        $this->assertEquals(array(), $alg->getVerticesGroup(123));
+
+        $this->assertFalse($alg->isBipartit());
+    }
+
+    public function testGraphPairIsBipartit()
+    {
+        // 1 -> 2
+        $graph = new Graph();
+        $v1 = $graph->createVertex(1)->setGroup(1);
+        $v2 = $graph->createVertex(2)->setGroup(2);
+        $v1->createEdgeTo($v2);
+
+        $alg = new AlgorithmGroups($graph);
+
+        $this->assertEquals(array(1, 2), $alg->getGroups());
+        $this->assertEquals(2, $alg->getNumberOfGroups());
+
+        $this->assertEquals(array(), $alg->getVerticesGroup(123));
+        $this->assertEquals(array(1 => $v1), $alg->getVerticesGroup(1));
+
+        $this->assertTrue($alg->isBipartit());
+    }
+
+    public function testGraphTriangleCycleIsNotBipartit()
+    {
+        // 1 -> 2 -> 3 -> 1
+        $graph = new Graph();
+        $v1 = $graph->createVertex(1)->setGroup(1);
+        $v2 = $graph->createVertex(2)->setGroup(2);
+        $v3 = $graph->createVertex(3)->setGroup(1);
+        $v1->createEdgeTo($v2);
+        $v2->createEdgeTo($v3);
+        $v3->createEdgeTo($v1);
+
+        $alg = new AlgorithmGroups($graph);
+
+        $this->assertEquals(array(1, 2), $alg->getGroups());
+        $this->assertEquals(2, $alg->getNumberOfGroups());
+
+        $this->assertEquals(array(), $alg->getVerticesGroup(123));
+        $this->assertEquals(array(1 => $v1, 3 => $v3), $alg->getVerticesGroup(1));
+
+        $this->assertFalse($alg->isBipartit());
+    }
+}