Yii2: how to write logs in file while testing with Codeception?

Question

I had set up log component with FileTarget in the main config and expected Yii::error() will write messages in the file when I will launch tests. But logging was catched up by Codeception\Lib\Connector\Yii2\Logger and log folder remains empty.

Is it possible to make Yii2 write logs in this situation?

Answer 1

You can configure correct logger before test:

public function testSomething() {
    Yii::setLogger(Yii::createObject(\yii\log\Logger::class));
    Yii::$app->log->setLogger(Yii::getLogger());
    // log something
    Yii::getLogger()->flush();
    // test log file
}

Answer 2

<?php

namespace tests;

class SomeTest extends \yii\codeception\TestCase
{

    public function testLogMessage()
    {
        \Yii::error('something bad occurred');
    }

}

And this correctly logs error under runtime/log/app.log with message:

2018/05/05 03:42:04 [127.0.0.1] [error] [application] something bad occurred