Declare classes readonly

Author: sebastianbergmann

.psalm/baseline.xml

@@ -81,6 +81,9 @@
     </PropertyTypeCoercion>
   </file>
   <file src="src/Event/Value/Test/TestData/TestDataCollection.php">
+    <PropertyNotSetInConstructor>
+      <code>$fromDataProvider</code>
+    </PropertyNotSetInConstructor>
     <PropertyTypeCoercion>
       <code>$data</code>
     </PropertyTypeCoercion>

src/Event/Value/ComparisonFailureBuilder.php

@@ -18,7 +18,7 @@
 /**
  * @internal This class is not covered by the backward compatibility promise for PHPUnit
  */
-final class ComparisonFailureBuilder
+final readonly class ComparisonFailureBuilder
 {
     public static function from(Throwable $t): ?ComparisonFailure
     {

src/Event/Value/Telemetry/Php81GarbageCollectorStatusProvider.php

@@ -14,7 +14,7 @@
 /**
  * @internal This class is not covered by the backward compatibility promise for PHPUnit
  */
-final class Php81GarbageCollectorStatusProvider implements GarbageCollectorStatusProvider
+final readonly class Php81GarbageCollectorStatusProvider implements GarbageCollectorStatusProvider
 {
     public function status(): GarbageCollectorStatus
     {

src/Event/Value/Telemetry/Php83GarbageCollectorStatusProvider.php

@@ -14,7 +14,7 @@
 /**
  * @internal This class is not covered by the backward compatibility promise for PHPUnit
  */
-final class Php83GarbageCollectorStatusProvider implements GarbageCollectorStatusProvider
+final readonly class Php83GarbageCollectorStatusProvider implements GarbageCollectorStatusProvider
 {
     public function status(): GarbageCollectorStatus
     {

src/Event/Value/Telemetry/SystemMemoryMeter.php

@@ -15,7 +15,7 @@
 /**
  * @internal This class is not covered by the backward compatibility promise for PHPUnit
  */
-final class SystemMemoryMeter implements MemoryMeter
+final readonly class SystemMemoryMeter implements MemoryMeter
 {
     public function memoryUsage(): MemoryUsage
     {

src/Event/Value/Telemetry/SystemStopWatch.php

@@ -15,7 +15,7 @@
 /**
  * @internal This class is not covered by the backward compatibility promise for PHPUnit
  */
-final class SystemStopWatch implements StopWatch
+final readonly class SystemStopWatch implements StopWatch
 {
     /**
      * @throws InvalidArgumentException

src/Event/Value/Test/Phpt.php

@@ -14,7 +14,7 @@
  *
  * @no-named-arguments Parameter names are not covered by the backward compatibility promise for PHPUnit
  */
-final class Phpt extends Test
+final readonly class Phpt extends Test
 {
     /**
      * @psalm-assert-if-true Phpt $this

src/Event/Value/Test/Test.php

@@ -14,12 +14,12 @@
  *
  * @no-named-arguments Parameter names are not covered by the backward compatibility promise for PHPUnit
  */
-abstract class Test
+abstract readonly class Test
 {
     /**
      * @psalm-var non-empty-string
      */
-    private readonly string $file;
+    private string $file;
 
     /**
      * @psalm-param non-empty-string $file

src/Event/Value/Test/TestData/DataFromDataProvider.php

@@ -14,10 +14,10 @@
  *
  * @no-named-arguments Parameter names are not covered by the backward compatibility promise for PHPUnit
  */
-final class DataFromDataProvider extends TestData
+final readonly class DataFromDataProvider extends TestData
 {
-    private readonly int|string $dataSetName;
-    private readonly string $dataAsStringForResultOutput;
+    private int|string $dataSetName;
+    private string $dataAsStringForResultOutput;
 
     public static function from(int|string $dataSetName, string $data, string $dataAsStringForResultOutput): self
     {

src/Event/Value/Test/TestData/DataFromTestDependency.php

@@ -14,7 +14,7 @@
  *
  * @no-named-arguments Parameter names are not covered by the backward compatibility promise for PHPUnit
  */
-final class DataFromTestDependency extends TestData
+final readonly class DataFromTestDependency extends TestData
 {
     public static function from(string $data): self
     {