MavenTestEngine.php
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	<?php

	/**
	* Basic test engine for running tests using Maven.
	*/
	final class MavenTestEngine extends ArcanistUnitTestEngine {

	private $project_root;

	public function run() {
	$working_copy = $this->getWorkingCopy();
	$this->project_root = $working_copy->getProjectRoot();

	// We only want to report results for tests that actually ran, so
	// we'll compare the test result files' timestamps to the start time
	// of the test run. This will probably break if multiple test runs
	// are happening in parallel, but if that's happening then we can't
	// count on the results files being intact anyway.
	$start_time = time();

	$maven_top_dirs = $this->findTopLevelMavenDirectories();

	// We'll figure out if any of the modified files we're testing are in
	// Maven directories. We won't want to run a bunch of Java tests for
	// changes to CSS files or whatever.
	$modified_paths = $this->getModifiedPaths();

	$maven_failed = false;

	foreach ($maven_top_dirs as $dir) {
	$dir_with_trailing_slash = $dir . '/';
	foreach ($modified_paths as $path) {
	if ($dir_with_trailing_slash ===
	substr($path, 0, strlen($dir_with_trailing_slash))) {
	$future = new ExecFuture('mvn test');
	$future->setCWD($dir);
	list($status, $stdout, $stderr) = $future->resolve();
	if ($status) {
	// Maven exits with a nonzero status if there were test failures
	// or if there was a compilation error.
	$maven_failed = true;
	break 2;
	}
	break;
	}
	}
	}

	$testResults = $this->parseTestResultsSince($start_time);
	if ($maven_failed) {
	// If there wasn't a test failure, then synthesize one to represent
	// the failure of the test run as a whole, since it probably means the
	// code failed to compile.
	$found_failure = false;
	foreach ($testResults as $testResult) {
	if ($testResult->getResult() === ArcanistUnitTestResult::RESULT_FAIL \|\|
	$testResult->getResult() === ArcanistUnitTestResult::RESULT_BROKEN) {
	$found_failure = true;
	break;
	}
	}

	if (!$found_failure) {
	$testResult = new ArcanistUnitTestResult();
	$testResult->setResult(ArcanistUnitTestResult::RESULT_BROKEN);
	$testResult->setName('mvn test');
	$testResults[] = $testResult;
	}
	}

	return $testResults;
	}

	/**
	* Returns an array of the full canonical paths to all the Maven directories
	* (directories containing pom.xml files) in the project.
	*/
	private function findMavenDirectories() {
	if (file_exists($this->project_root . "/.git")) {
	// The fastest way to find all the pom.xml files is to let git scan
	// its index.
	$future = new ExecFuture('git ls-files \*/pom.xml');
	} else {
	// Not a git repo. Do it the old-fashioned way.
	$future = new ExecFuture('find . -name pom.xml -print');
	}

	// TODO: This will find all the pom.xml files in the working copy.
	// Need to obey the optional paths argument to "arc unit" to let users
	// run just a subset of tests.
	$future->setCWD($this->project_root);
	list($stdout) = $future->resolvex();

	$poms = explode("\n", trim($stdout));
	if (!$poms) {
	throw new Exception("No pom.xml files found");
	}

	$maven_dirs = array_map(function($pom) {
	$maven_dir = dirname($pom);
	return realpath($this->project_root . '/' . $maven_dir);
	}, $poms);

	return $maven_dirs;
	}

	/**
	* Returns an array of the full canonical paths to all the top-level Maven
	* directories in the project. A directory is not considered top-level if
	* one of its parent directories has a pom.xml.
	*/
	private function findTopLevelMavenDirectories() {
	$maven_dirs = $this->findMavenDirectories();
	sort($maven_dirs);

	$previous_top_dir = '-';
	$top_dirs = array();
	foreach ($maven_dirs as $maven_dir) {
	if ($previous_top_dir !==
	substr($maven_dir . '/', 0, strlen($previous_top_dir))) {
	$previous_top_dir = $maven_dir . '/';
	$top_dirs[] = $maven_dir;
	}
	}

	return $top_dirs;
	}

	/**
	* Returns an array of paths to the JUnit test result XML files in the
	* project.
	*/
	private function findTestResultFiles() {
	$maven_dirs = $this->findMavenDirectories();
	$result_dirs = array();
	foreach ($maven_dirs as $maven_dir) {
	$fullpath = $maven_dir . '/target/surefire-reports';
	if (file_exists($fullpath)) {
	$result_dirs[] = $fullpath;
	}
	}

	$result_files = array();
	foreach ($result_dirs as $result_dir) {
	$xmlfiles = glob($result_dir . "/*.xml");
	$result_files = array_merge($result_files, $xmlfiles);
	}

	return $result_files;
	}

	/**
	* Returns the full paths to all the files modified in the workspace.
	*/
	private function getModifiedPaths() {
	$paths = $this->getPaths();
	return array_map(function($path) {
	return realpath($this->project_root . '/' . $path);
	}, $paths);
	}

	/**
	* Parses all the test results that have been written since a particular
	* starting time.
	*/
	private function parseTestResultsSince($start_time) {
	$parser = new ArcanistXUnitTestResultParser();
	$results = array();

	$result_files = $this->findTestResultFiles();

	foreach ($result_files as $file) {
	$stat = stat($file);
	if ($stat && $stat['mtime'] >= $start_time) {
	$new_results = $parser->parseTestResults(Filesystem::readFile($file));
	if ($new_results) {
	$results = array_merge($results, $new_results);
	}
	}
	}

	return $results;
	}
	}

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MavenTestEngine.php
sgrimm (Steven Grimm)
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	sgrimm
	Aug 20 2015, 2:14 PM

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sgrimm (Steven Grimm)
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