improve WithoutErrorHandler test

Author: mvorisek

tests/end-to-end/event/_files/error-handler-can-be-disabled/tests/FooTest.php

@@ -9,6 +9,8 @@
  */
 namespace PHPUnit\TestFixture\Event\ErrorHandlerCanBeDisabled;
 
+use function restore_error_handler;
+use function set_error_handler;
 use function sys_get_temp_dir;
 use function tempnam;
 use Exception;
@@ -33,4 +35,26 @@ public function testMethodB(): void
     {
         $this->assertSame('Triggering', (new Foo)->methodB()['message']);
     }
+
+    public function testErrorHandlerSet(): void
+    {
+        $this->assertIsCallable($this->getErrorHandler());
+    }
+
+    #[WithoutErrorHandler]
+    public function testErrorHandlerIsNotSet(): void
+    {
+        $this->assertNull($this->getErrorHandler());
+    }
+
+    /**
+     * @return null|callable
+     */
+    private function getErrorHandler()
+    {
+        $res = set_error_handler(static fn () => false);
+        restore_error_handler();
+
+        return $res;
+    }
 }

tests/end-to-end/event/error-handler-can-be-disabled.phpt

@@ -23,14 +23,14 @@ unlink($traceFile);
 PHPUnit Started (PHPUnit %s using %s)
 Test Runner Configured
 Bootstrap Finished (%s%esrc/Foo.php)
-Test Suite Loaded (2 tests)
+Test Suite Loaded (4 tests)
 Event Facade Sealed
 Test Runner Started
 Test Suite Sorted
-Test Runner Execution Started (2 tests)
-Test Suite Started (%s%ephpunit.xml, 2 tests)
-Test Suite Started (default, 2 tests)
-Test Suite Started (PHPUnit\TestFixture\Event\ErrorHandlerCanBeDisabled\FooTest, 2 tests)
+Test Runner Execution Started (4 tests)
+Test Suite Started (%s%ephpunit.xml, 4 tests)
+Test Suite Started (default, 4 tests)
+Test Suite Started (PHPUnit\TestFixture\Event\ErrorHandlerCanBeDisabled\FooTest, 4 tests)
 Test Preparation Started (PHPUnit\TestFixture\Event\ErrorHandlerCanBeDisabled\FooTest::testMethodA)
 Test Prepared (PHPUnit\TestFixture\Event\ErrorHandlerCanBeDisabled\FooTest::testMethodA)
 Assertion Succeeded (Constraint: exception of type "Exception", Value: {enable export of objects to see this value})
@@ -42,9 +42,19 @@ Test Prepared (PHPUnit\TestFixture\Event\ErrorHandlerCanBeDisabled\FooTest::test
 Assertion Succeeded (Constraint: is identical to 'Triggering', Value: 'Triggering')
 Test Passed (PHPUnit\TestFixture\Event\ErrorHandlerCanBeDisabled\FooTest::testMethodB)
 Test Finished (PHPUnit\TestFixture\Event\ErrorHandlerCanBeDisabled\FooTest::testMethodB)
-Test Suite Finished (PHPUnit\TestFixture\Event\ErrorHandlerCanBeDisabled\FooTest, 2 tests)
-Test Suite Finished (default, 2 tests)
-Test Suite Finished (%s%ephpunit.xml, 2 tests)
+Test Preparation Started (PHPUnit\TestFixture\Event\ErrorHandlerCanBeDisabled\FooTest::testErrorHandlerSet)
+Test Prepared (PHPUnit\TestFixture\Event\ErrorHandlerCanBeDisabled\FooTest::testErrorHandlerSet)
+Assertion Succeeded (Constraint: is of type callable, Value: {enable export of objects to see this value})
+Test Passed (PHPUnit\TestFixture\Event\ErrorHandlerCanBeDisabled\FooTest::testErrorHandlerSet)
+Test Finished (PHPUnit\TestFixture\Event\ErrorHandlerCanBeDisabled\FooTest::testErrorHandlerSet)
+Test Preparation Started (PHPUnit\TestFixture\Event\ErrorHandlerCanBeDisabled\FooTest::testErrorHandlerIsNotSet)
+Test Prepared (PHPUnit\TestFixture\Event\ErrorHandlerCanBeDisabled\FooTest::testErrorHandlerIsNotSet)
+Assertion Succeeded (Constraint: is null, Value: {enable export of objects to see this value})
+Test Passed (PHPUnit\TestFixture\Event\ErrorHandlerCanBeDisabled\FooTest::testErrorHandlerIsNotSet)
+Test Finished (PHPUnit\TestFixture\Event\ErrorHandlerCanBeDisabled\FooTest::testErrorHandlerIsNotSet)
+Test Suite Finished (PHPUnit\TestFixture\Event\ErrorHandlerCanBeDisabled\FooTest, 4 tests)
+Test Suite Finished (default, 4 tests)
+Test Suite Finished (%s%ephpunit.xml, 4 tests)
 Test Runner Execution Finished
 Test Runner Finished
 PHPUnit Finished (Shell Exit Code: 0)