PHUIDiffGraphViewTestCase.php
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	<?php

	final class PHUIDiffGraphViewTestCase extends PhabricatorTestCase {

	public function testTailTermination() {
	$nodes = array(
	'A' => array('B'),
	'B' => array('C', 'D', 'E'),
	'E' => array(),
	'D' => array(),
	'C' => array('F', 'G'),
	'G' => array(),
	'F' => array(),
	);

	$graph = $this->newGraph($nodes);

	$picture = array(
	'^',
	'o',
	'\|\|x',
	'\|x ',
	'o ',
	'\|x ',
	'x ',
	);

	$this->assertGraph($picture, $graph, pht('Terminating Tree'));
	}

	public function testReverseTree() {
	$nodes = array(
	'A' => array('B'),
	'C' => array('B'),
	'B' => array('D'),
	'E' => array('D'),
	'F' => array('D'),
	'D' => array('G'),
	'G' => array(),
	);

	$graph = $this->newGraph($nodes);

	$picture = array(
	'^',
	'\|^',
	'o ',
	'\|^',
	'\|\|^',
	'o ',
	'x',
	);

	$this->assertGraph($picture, $graph, pht('Reverse Tree'));
	}

	public function testJoinTerminateTree() {
	$nodes = array(
	'A' => array('D'),
	'B' => array('C'),
	'C' => array('D'),
	'D' => array(),
	);

	$graph = $this->newGraph($nodes);

	$picture = array(
	'^',
	'\|^',
	'\|o',
	'x ',
	);

	$this->assertGraph($picture, $graph, pht('Reverse Tree'));
	}

	private function newGraph(array $nodes) {
	return id(new PHUIDiffGraphView())
	->setIsHead(true)
	->setIsTail(true)
	->renderRawGraph($nodes);
	}

	private function assertGraph($picture, $graph, $label) {
	list($data, $count) = $graph;
	$lines = ipull($data, 'line');

	$picture = implode("\n", $picture);
	$lines = implode("\n", $lines);

	$this->assertEqual($picture, $lines, $label);
	}

	}