minor #54785 Remove calls to TestCase::iniSet() and calls to deprecated methods of MockBuilder (alexandre-daubois)

This PR was merged into the 5.4 branch.

Discussion
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Remove calls to `TestCase::iniSet()` and calls to deprecated methods of `MockBuilder`

| Q             | A
| ------------- | ---
| Branch?       | 5.4
| Bug fix?      | no
| New feature?  | no
| Deprecations? | no
| Issues        | -
| License       | MIT

Last round (before new deprecations 🙂). All deprecations [listed here](https://github.com/sebastianbergmann/phpunit/blob/main/DEPRECATIONS.md) should be gone.

Commits
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4d5065ddd9 Remove calls to `TestCase::iniSet()` and calls to deprecated methods of `MockBuilder`

Author: xabbuh

Tests/ApplicationTest.php

@@ -41,6 +41,7 @@
 use Symfony\Component\Console\SignalRegistry\SignalRegistry;
 use Symfony\Component\Console\Terminal;
 use Symfony\Component\Console\Tester\ApplicationTester;
+use Symfony\Component\Console\Tests\Fixtures\MockableAppliationWithTerminalWidth;
 use Symfony\Component\DependencyInjection\ContainerBuilder;
 use Symfony\Component\EventDispatcher\EventDispatcher;
 use Symfony\Component\EventDispatcher\EventDispatcherInterface;
@@ -876,7 +877,9 @@ public function testRenderExceptionEscapesLines()
 
     public function testRenderExceptionLineBreaks()
     {
-        $application = $this->getMockBuilder(Application::class)->addMethods(['getTerminalWidth'])->getMock();
+        $application = $this->getMockBuilder(MockableAppliationWithTerminalWidth::class)
+            ->onlyMethods(['getTerminalWidth'])
+            ->getMock();
         $application->setAutoExit(false);
         $application->expects($this->any())
             ->method('getTerminalWidth')

Tests/Fixtures/MockableAppliationWithTerminalWidth.php

@@ -0,0 +1,22 @@
+<?php
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <fabien@symfony.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Symfony\Component\Console\Tests\Fixtures;
+
+use Symfony\Component\Console\Application;
+
+class MockableAppliationWithTerminalWidth extends Application
+{
+    public function getTerminalWidth(): int
+    {
+        return 0;
+    }
+}