[PHPUnit 9.1] Migrate PHPUnit test class from built-in Prophecy integration to trait

[sebastianbergmann]

The tight integration of Prophecy into PHPUnit is deprecated in PHPUnit 9.1 and will be removed in PHPUnit 10.

A rector would be nice that looks for classes that extend PHPUnit\Framework\TestCase and call $this->prophesize(). The class needs to be changed to use the Prophecy\PhpUnit\ProphecyTrait trait:

 use PHPUnit\Framework\TestCase;
+use Prophecy\PhpUnit\ProphecyTrait;
 
final class ExampleTest extends TestCase
 {
+    use ProphecyTrait;
+
     public function testOne(): void
     {
         $prophecy = $this->prophesize(\AnInterface::class);

[TomasVotruba]

I'll look on it this week. Thanks for clear diff!

[TomasVotruba]

Done: #3117