How can I get PHPUnit to print inner exceptions? - php

Question

Is there a way to get PHPUnit to print inner exceptions when something goes wrong?
Here's a simple example:
class TestTest extends \PHPUnit\Framework\TestCase
{
function test() {
throw new Exception("Outer exception message", 0, new Exception("Inner exception message"));
}
}
I want to see both messages but I only see the outer one.

Answer 1

Decorator pattern is helpful.
class OuterDecoratorException extends \Exception {
private $innerException;
public function __construct(string $message, \Exception $innerException) {
$this->message = $message;
$this->innerException = $innerException;
}
public function __toString(): string {
return \sprintf(
"Outer: %s Inner: %s",
$this->getMessage(),
$this->innerException->getMessage()
);
}
}
throw new OuterDecoratorException("Outer message", new \Exception("Inner message"));
2. Prefer over a decorator, direct compilation of exception message in every test.
class TestTest extends \PHPUnit\Framework\TestCase
{
function test() {
throw new \Exception(
sprintf(
"Inner: %s Outer: %s",
"Inner message",
(new \Exception("Outer message"))->getMessage()
),
0
);
}
}
Otherwise you must extends a library. See manual - how to extends a framework.

Answer 2

PHPUnit already supports this.
$ cat TestTest.php
<?php
require_once 'vendor/autoload.php';
class TestTest extends PHPUnit_Framework_TestCase {
function test() {
throw new Exception("Outer exception message", 0, new Exception("Inner exception message"));
}
}
$ ./vendor/bin/phpunit TestTest.php
PHPUnit 5.3.5 by Sebastian Bergmann and contributors.
E 1 / 1 (100%)
Time: 57 ms, Memory: 4.25MB
There was 1 error:
1) TestTest::test
Exception: Outer exception message
/tmp/TestTest.php:7
Caused by
Exception: Inner exception message
/tmp/TestTest.php:7
FAILURES!
Tests: 1, Assertions: 0, Errors: 1.
That it doesn't suggests your environment isn't booting properly. I suspect it's because you're using namespaces, which IIRC, PHPUnit doesn't support. Change \PHPUnit\Framework\TestCase to PHPUnit_Framework_TestCase.