PHPUnitでとにかく楽に遅いテストをピックアップする

とりあえず楽したいならこんな感じで PHPUnit の listener を作ればいい。

tests/listeners/PickSlowListener.php

<?php

class PickSlowListener extends PHPUnit_Framework_BaseTestListener
{
    private $test_start_time;

    private $test_time_results = array();

    private $rank_limit;

    public function __construct($rank_limit)
    {
        $this->rank_limit = $rank_limit;
    }

    public function startTestSuite(PHPUnit_Framework_TestSuite $suite)
    {
        $this->test_start_time = microtime(true);
    }

    public function endTestSuite(PHPUnit_Framework_TestSuite $suite)
    {
        $this->test_time_results[$suite->getName()] = microtime(true) - $this->test_start_time;
    }

    public function __destruct()
    {
        if (empty($this->test_time_results)) {
            return;
        }

        echo 'SLOW TEST WORST ' . $this->rank_limit . PHP_EOL;
        arsort($this->test_time_results);
        foreach (array_slice($this->test_time_results, 0, $this->rank_limit) as $test_name => $time) {
            echo $test_name . ':' . $time . PHP_EOL;
        }
    }
}

設定はこんな感じで

diff --git a/phpunit.xml.dist b/phpunit.xml.dist
index 858b395..204e559 100644
--- a/phpunit.xml.dist
+++ b/phpunit.xml.dist
@@ -21,4 +21,13 @@
     <logging>
         <log type="coverage-clover" target="build/logs/clover.xml"/>
     </logging>
+
+    <listeners>
+        <listener class="PickSlowListener" file="tests/listeners/PickSlowListener.php">
+            <arguments>
+                <integer name="rank_limit">1</integer>
+            </arguments>
+        </listener>
+    </listeners>
 </phpunit>

出力はこのようになる

 ~/Documents/program/ghq/github.com/gong023/assert_chain/ [master*] ./vendor/bin/phpunit
PHPUnit 4.4.0 by Sebastian Bergmann.

........

Time: 1.48 seconds, Memory: 10.50Mb

OK (8 tests, 69 assertions)

Generating code coverage report in Clover XML format ... done
SLOW TEST WORST 1
AssertChain\Container\Test\AggregaterTest:0.64362788200378