phpunit.xml

<phpunit
        convertErrorsToExceptions="true"
        convertNoticesToExceptions="true"
        convertWarningsToExceptions="true"
        beStrictAboutTestsThatDoNotTestAnything="true"
>
    <testsuites>
        <testsuite name="All Tests">
            <directory>./tests</directory>
        </testsuite>
    </testsuites>
    <filter>
        <whitelist processUncoveredFilesFromWhitelist="true">
            <directory suffix=".php">./tests</directory>
        </whitelist>
    </filter>
    <php>
        <ini name="zend.assertions" value="1"/>
        <ini name="assert.exception" value="1"/>
        <ini name="display_errors" value="1"/>
        <ini name="display_startup_errors" value="1"/>
        <const name="UNIT_TEST" value="true"/>
    </php>
</phpunit>