testing

DifferentialDiffTestCase.php
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			<?php

			final class DifferentialDiffTestCase extends ArcanistPhutilTestCase {

			public function testDetectCopiedCode() {
			$root = dirname(__FILE__).'/diff/';
			$parser = new ArcanistDiffParser();

			$diff = DifferentialDiff::newFromRawChanges(
			$parser->parseDiff(Filesystem::readFile($root.'lint_engine.diff')));
			$copies = idx(head($diff->getChangesets())->getMetadata(), 'copy:lines');

			$this->assertEqual(
			array_combine(range(237, 252), range(167, 182)),
			ipull($copies, 1));
			}

			}