phpunit.xml

<?xml version="1.0" encoding="utf-8"?>
<phpunit bootstrap="tests/bootstrap.php"
         strict="true">
  <testsuites>
    <testsuite name="Unit Tests">
      <directory>tests/unit-tests</directory>
    </testsuite>
  </testsuites>
  <php>
    <includePath>.</includePath>
  </php>
  <filter>
    <whitelist addUncoveredFilesFromWhitelist="true">
      <directory suffix=".php">src</directory>
    </whitelist>
  </filter>
</phpunit>