DX: check deprecations exactly - order or count of expectation vs act…

…ual usage can vary, but result sets must be identical

tests/TestCase.php

@@ -35,10 +35,16 @@ abstract class TestCase extends BaseTestCase
     protected function tearDown(): void
     {
         if (null !== $this->previouslyDefinedErrorHandler) {
+            $this->actualDeprecations = array_unique($this->actualDeprecations);
+            sort($this->actualDeprecations);
+            $this->expectedDeprecations = array_unique($this->expectedDeprecations);
+            sort($this->expectedDeprecations);
             self::assertSame($this->expectedDeprecations, $this->actualDeprecations);
 
             restore_error_handler();
         }
+
+        parent::tearDown();
     }
 
     final public function testNotDefiningConstructor(): void
@@ -52,6 +58,8 @@ final public function testNotDefiningConstructor(): void
     }
 
     /**
+     * Mark test to expect given deprecation. Order or repetition count of expected vs actual deprecation usage can vary, but result sets must be identical.
+     *
      * @TODO change access to protected and pass the parameter when PHPUnit 9 support is dropped
      */
     public function expectDeprecation(/* string $message */): void
@@ -66,8 +74,6 @@ function (
                 ) {
                     if (E_USER_DEPRECATED === $code || E_DEPRECATED === $code) {
                         $this->actualDeprecations[] = $message;
-                        $this->actualDeprecations = array_unique($this->actualDeprecations);
-                        sort($this->actualDeprecations);
                     }
 
                     return true;