wire annotations

src/Framework/Attributes/RunClassInSeparateProcess.php

@@ -21,7 +21,7 @@
 {
     private ?bool $forkIfPossible;
 
-    public function __construct(bool $forkIfPossible = null)
+    public function __construct(?bool $forkIfPossible = null)
     {
         $this->forkIfPossible = $forkIfPossible;
     }

src/Framework/TestBuilder.php

@@ -19,6 +19,9 @@
 use PHPUnit\Metadata\ExcludeStaticPropertyFromBackup;
 use PHPUnit\Metadata\Parser\Registry as MetadataRegistry;
 use PHPUnit\Metadata\PreserveGlobalState;
+use PHPUnit\Metadata\RunClassInSeparateProcess;
+use PHPUnit\Metadata\RunInSeparateProcess;
+use PHPUnit\Metadata\RunTestsInSeparateProcesses;
 use PHPUnit\TextUI\Configuration\Registry as ConfigurationRegistry;
 use ReflectionClass;
 
@@ -51,6 +54,7 @@
                 $this->shouldTestMethodBeRunInSeparateProcess($className, $methodName),
                 $this->shouldGlobalStateBePreserved($className, $methodName),
                 $this->shouldAllTestMethodsOfTestClassBeRunInSingleSeparateProcess($className),
+                $this->shouldForkIfPossible($className, $methodName),
                 $this->backupSettings($className, $methodName),
                 $groups,
             );
@@ -64,6 +68,7 @@
             $this->shouldTestMethodBeRunInSeparateProcess($className, $methodName),
             $this->shouldGlobalStateBePreserved($className, $methodName),
             $this->shouldAllTestMethodsOfTestClassBeRunInSingleSeparateProcess($className),
+            $this->shouldForkIfPossible($className, $methodName),
             $this->backupSettings($className, $methodName),
         );
 
@@ -76,7 +81,7 @@
      * @psalm-param array{backupGlobals: ?bool, backupGlobalsExcludeList: list<string>, backupStaticProperties: ?bool, backupStaticPropertiesExcludeList: array<string,list<string>>} $backupSettings
      * @psalm-param list<non-empty-string> $groups
      */
-    private function buildDataProviderTestSuite(string $methodName, string $className, array $data, bool $runTestInSeparateProcess, ?bool $preserveGlobalState, bool $runClassInSeparateProcess, array $backupSettings, array $groups): DataProviderTestSuite
+    private function buildDataProviderTestSuite(string $methodName, string $className, array $data, bool $runTestInSeparateProcess, ?bool $preserveGlobalState, bool $runClassInSeparateProcess, bool $forkIfPossible, array $backupSettings, array $groups): DataProviderTestSuite
     {
         $dataProviderTestSuite = DataProviderTestSuite::empty(
             $className . '::' . $methodName,
@@ -98,6 +103,7 @@
                 $runTestInSeparateProcess,
                 $preserveGlobalState,
                 $runClassInSeparateProcess,
+                $forkIfPossible,
                 $backupSettings,
             );
 
@@ -110,7 +116,7 @@
     /**
      * @psalm-param array{backupGlobals: ?bool, backupGlobalsExcludeList: list<string>, backupStaticProperties: ?bool, backupStaticPropertiesExcludeList: array<string,list<string>>} $backupSettings
      */
-    private function configureTestCase(TestCase $test, bool $runTestInSeparateProcess, ?bool $preserveGlobalState, bool $runClassInSeparateProcess, array $backupSettings): void
+    private function configureTestCase(TestCase $test, bool $runTestInSeparateProcess, ?bool $preserveGlobalState, bool $runClassInSeparateProcess, bool $forkIfPossible, array $backupSettings): void
     {
         if ($runTestInSeparateProcess) {
             $test->setRunTestInSeparateProcess(true);
@@ -120,6 +126,10 @@
             $test->setRunClassInSeparateProcess(true);
         }
 
+        if ($forkIfPossible) {
+            $test->setForkIfPossible(true);
+        }
+
         if ($preserveGlobalState !== null) {
             $test->setPreserveGlobalState($preserveGlobalState);
         }
@@ -272,4 +282,53 @@
     {
         return MetadataRegistry::parser()->forClass($className)->isRunClassInSeparateProcess()->isNotEmpty();
     }
+
+    /**
+     * @psalm-param class-string $className
+     * @psalm-param non-empty-string $methodName
+     */
+    private function shouldForkIfPossible(string $className, string $methodName): bool
+    {
+        $metadataForMethod = MetadataRegistry::parser()->forMethod($className, $methodName);
+
+        if ($metadataForMethod->isRunInSeparateProcess()->isNotEmpty()) {
+            $metadata = $metadataForMethod->isRunInSeparateProcess()->asArray()[0];
+
+            assert($metadata instanceof RunInSeparateProcess);
+
+            $forkIfPossible = $metadata->forkIfPossible();
+
+            if ($forkIfPossible !== null) {
+                return $forkIfPossible;
+            }
+        }
+
+        $metadataForClass = MetadataRegistry::parser()->forClass($className);
+
+        if ($metadataForClass->isRunTestsInSeparateProcesses()->isNotEmpty()) {
+            $metadata = $metadataForClass->isRunTestsInSeparateProcesses()->asArray()[0];
+
+            assert($metadata instanceof RunTestsInSeparateProcesses);
+
+            $forkIfPossible = $metadata->forkIfPossible();
+
+            if ($forkIfPossible !== null) {
+                return $forkIfPossible;
+            }
+        }
+
+        if ($metadataForClass->isRunClassInSeparateProcess()->isNotEmpty()) {
+            $metadata = $metadataForClass->isRunClassInSeparateProcess()->asArray()[0];
+
+            assert($metadata instanceof RunClassInSeparateProcess);
+
+            $forkIfPossible = $metadata->forkIfPossible();
+
+            if ($forkIfPossible !== null) {
+                return $forkIfPossible;
+            }
+        }
+
+        return false;
+    }
 }

src/Framework/TestCase.php

@@ -142,6 +142,7 @@ abstract class TestCase extends Assert implements Reorderable, SelfDescribing, T
      */
     private ?array $backupGlobalExceptionHandlers   = null;
     private ?bool $runClassInSeparateProcess        = null;
+    private ?bool $forkIfPossible                   = null;
     private ?bool $runTestInSeparateProcess         = null;
     private bool $preserveGlobalState               = false;
     private bool $inIsolation                       = false;
@@ -340,6 +341,7 @@ final public function run(): void
                 $this,
                 $this->runClassInSeparateProcess && !$this->runTestInSeparateProcess,
                 $this->preserveGlobalState,
+                $this->forkIfPossible === true,
             );
         }
     }
@@ -709,6 +711,14 @@ final public function setRunClassInSeparateProcess(bool $runClassInSeparateProce
         $this->runClassInSeparateProcess = $runClassInSeparateProcess;
     }
 
+    /**
+     * @internal This method is not covered by the backward compatibility promise for PHPUnit
+     */
+    final public function setForkIfPossible(bool $forkIfPossible): void
+    {
+        $this->forkIfPossible = $forkIfPossible;
+    }
+
     /**
      * @internal This method is not covered by the backward compatibility promise for PHPUnit
      */

src/Framework/TestRunner.php

@@ -249,15 +249,15 @@
      * @throws ProcessIsolationException
      * @throws StaticAnalysisCacheNotConfiguredException
      */
-    public function runInSeparateProcess(TestCase $test, bool $runEntireClass, bool $preserveGlobalState): void
+    public function runInSeparateProcess(TestCase $test, bool $runEntireClass, bool $preserveGlobalState, bool $forkIfPossible): void
     {
-        if (PcntlFork::isPcntlForkAvailable()) {
+        if ($forkIfPossible && PcntlFork::isPcntlForkAvailable()) {
             // forking the parent process is a more lightweight way to run a test in isolation.
             // it requires the pcntl extension though.
             $fork = new PcntlFork;
             $fork->runTest($test);
 
             return;
         }
 
         $class = new ReflectionClass($test);

tests/_files/Metadata/Attribute/tests/ProcessIsolationForkedTest.php

@@ -0,0 +1,25 @@
+<?php declare(strict_types=1);
+/*
+ * This file is part of PHPUnit.
+ *
+ * (c) Sebastian Bergmann <[email protected]>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+namespace PHPUnit\TestFixture\Metadata\Attribute;
+
+use PHPUnit\Framework\Attributes\RunClassInSeparateProcess;
+use PHPUnit\Framework\Attributes\RunInSeparateProcess;
+use PHPUnit\Framework\Attributes\RunTestsInSeparateProcesses;
+use PHPUnit\Framework\TestCase;
+
+#[RunClassInSeparateProcess(true)]
+#[RunTestsInSeparateProcesses]
+final class ProcessIsolationForkedTest extends TestCase
+{
+    #[RunInSeparateProcess]
+    public function testOne(): void
+    {
+    }
+}

tests/_files/TestWithClassLevelIsolationAttributesForked.php

@@ -0,0 +1,27 @@
+<?php declare(strict_types=1);
+/*
+ * This file is part of PHPUnit.
+ *
+ * (c) Sebastian Bergmann <[email protected]>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+namespace PHPUnit\TestFixture\TestBuilder;
+
+use PHPUnit\Framework\Attributes\BackupGlobals;
+use PHPUnit\Framework\Attributes\BackupStaticProperties;
+use PHPUnit\Framework\Attributes\RunClassInSeparateProcess;
+use PHPUnit\Framework\Attributes\RunTestsInSeparateProcesses;
+use PHPUnit\Framework\TestCase;
+
+#[BackupGlobals(true)]
+#[BackupStaticProperties(true)]
+#[RunClassInSeparateProcess]
+#[RunTestsInSeparateProcesses(true)]
+final class TestWithClassLevelIsolationAttributesForked extends TestCase
+{
+    public function testOne(): void
+    {
+    }
+}

tests/_files/TestWithMethodLevelIsolationAttributesForked.php

@@ -0,0 +1,25 @@
+<?php declare(strict_types=1);
+/*
+ * This file is part of PHPUnit.
+ *
+ * (c) Sebastian Bergmann <[email protected]>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+namespace PHPUnit\TestFixture\TestBuilder;
+
+use PHPUnit\Framework\Attributes\BackupGlobals;
+use PHPUnit\Framework\Attributes\BackupStaticProperties;
+use PHPUnit\Framework\Attributes\RunInSeparateProcess;
+use PHPUnit\Framework\TestCase;
+
+final class TestWithMethodLevelIsolationAttributes extends TestCase
+{
+    #[BackupGlobals(true)]
+    #[BackupStaticProperties(true)]
+    #[RunInSeparateProcess(true)]
+    public function testOne(): void
+    {
+    }
+}