Unit test for TGF exporter

Author: clue

tests/TrivialGraphFormatTest.php

@@ -0,0 +1,76 @@
+<?php
+
+use Fhaculty\Graph\Exporter\TrivialGraphFormat;
+
+use Fhaculty\Graph\Graph;
+
+use Fhaculty\Graph\Loader\CompleteGraph;
+
+class TrivialGraphFormatTest extends TestCase
+{
+    public function testEmpty()
+    {
+        $graph = new Graph();
+
+        $exporter = new TrivialGraphFormat();
+        $this->assertEquals('#' . PHP_EOL, $exporter->getOutput($graph));
+    }
+
+    public function testTrivial()
+    {
+        $graph = new Graph();
+        $graph->createVertex('trivial');
+
+        $expected = <<<END
+1 trivial
+#
+
+END;
+
+        $exporter = new TrivialGraphFormat();
+        $this->assertEquals($expected, $exporter->getOutput($graph));
+    }
+
+    public function testSimpleDirected()
+    {
+        // a -> b
+        // c
+        $graph = new Graph();
+        $graph->createVertex('a')->createEdgeTo($graph->createVertex('b'));
+        $graph->createVertex('c');
+
+        $expected = <<<END
+1 a
+2 b
+3 c
+#
+1 2
+
+END;
+
+        $exporter = new TrivialGraphFormat();
+        $this->assertEquals($expected, $exporter->getOutput($graph));
+    }
+
+    public function testSimpleUndirected()
+    {
+        // a -- b
+        // c
+        $graph = new Graph();
+        $graph->createVertex('a')->createEdge($graph->createVertex('b'));
+        $graph->createVertex('c');
+
+        $expected = <<<END
+1 a
+2 b
+3 c
+#
+1 2
+2 1
+
+END;
+
+        $exporter = new TrivialGraphFormat();
+        $this->assertEquals($expected, $exporter->getOutput($graph));
+    }
+}