Behat Coverage implement of http://www.label305.com/laravel/mink/behat/coverage/2015/02/17/Code-coverage-for-the-Laravel-Behat-Extension.html

CodeCoverage.php

<?php

namespace Feature\Helper;

use SebastianBergmann\CodeCoverage\Filter;
use SebastianBergmann\CodeCoverage\CodeCoverage as PHPUnitCodeCoverage;
use SebastianBergmann\CodeCoverage\InvalidArgumentException;
use SebastianBergmann\CodeCoverage\Report\Clover;
use SebastianBergmann\CodeCoverage\Report\Html\Facade as Html;
use SebastianBergmann\CodeCoverage\Report\Text;
use SebastianBergmann\CodeCoverage\RuntimeException;

trait CodeCoverage
{
    /**
     * @var PHPUnitCodeCoverage
     */
    protected static $coverage;

    /**
     * @BeforeSuite
     * @throws RuntimeException
     * @throws InvalidArgumentException
     */
    public static function setupCoverage()
    {
        if (self::isCodeCoverageEnabled()) {
            $filter = new Filter();
            $filter->addDirectoryToWhitelist(__DIR__ . '/../../app');
            $filter->addDirectoryToWhitelist(__DIR__ . '/../../src');
            self::$coverage = new PHPUnitCodeCoverage(null, $filter);
            self::$coverage->start('Behat Test');
        }
    }

    /**
     * @AfterSuite
     * @throws InvalidArgumentException
     */
    public static function writeCoverageFiles()
    {
        if (self::isCodeCoverageEnabled()) {
            self::$coverage->stop();
            // Use Clover to analyze your coverage with a tool
            if (getenv('CODE_COVERAGE_CLOVER')) {
                $writer = new Clover;
                $writer->process(
                    self::$coverage,
                    __DIR__ . '/../../reports/coverage/clover.xml'
                );
            }
            // Use HTML to take a look at your test coverage locally
            if (getenv('CODE_COVERAGE_HTML')) {
                $writer = new Html;
                $writer->process(
                    self::$coverage,
                    __DIR__ . '/../../reports/coverage'
                );
            }
            // use the text report to append the coverage results
            // to stdout at the end of the test run
            // so you can view them from the command line
            $writer = new Text(75, 90, false, false);
            fwrite(STDOUT, $writer->process(self::$coverage, true));
        }
    }

    /**
     * @return bool
     */
    private static function isCodeCoverageEnabled()
    {
        return
            getenv('CODE_COVERAGE') ||
            getenv('CODE_COVERAGE_HTML') ||
            getenv('CODE_COVERAGE_CLOVER');
    }
}