Closes #6046

Author: sebastianbergmann

ChangeLog-11.5.md

@@ -12,4 +12,8 @@ All notable changes of the PHPUnit 11.5 release series are documented in this fi
 * [#5999](https://github.com/sebastianbergmann/phpunit/pull/5999): Do not run `CLEAN` section of PHPT test in separate process when it is free of side effects that modify the parent process
 * `TestRunner\ChildProcessStarted` and `TestRunner\ChildProcessFinished` events
 
+### Deprecated
+
+* [#6046](https://github.com/sebastianbergmann/phpunit/issues/6046): Support for using `assertContainsOnly()` (and `assertNotContainsOnly()`) with classes and interfaces
+
 [11.5.0]: https://github.com/sebastianbergmann/phpunit/compare/11.4...11.5

DEPRECATIONS.md

@@ -8,10 +8,11 @@ This functionality is currently [hard-deprecated](https://phpunit.de/backward-co
 
 #### Assertions, Constraints, and Expectations
 
-| Issue                                                             | Description                                    | Since  | Replacement |
-|-------------------------------------------------------------------|------------------------------------------------|--------|-------------|
-| [#5472](https://github.com/sebastianbergmann/phpunit/issues/5472) | `TestCase::assertStringNotMatchesFormat()`     | 10.4.0 |             |
-| [#5472](https://github.com/sebastianbergmann/phpunit/issues/5472) | `TestCase::assertStringNotMatchesFormatFile()` | 10.4.0 |             |
+| Issue                                                             | Description                                                                            | Since  | Replacement                                                                |
+|-------------------------------------------------------------------|----------------------------------------------------------------------------------------|--------|----------------------------------------------------------------------------|
+| [#5472](https://github.com/sebastianbergmann/phpunit/issues/5472) | `TestCase::assertStringNotMatchesFormat()`                                             | 10.4.0 |                                                                            |
+| [#5472](https://github.com/sebastianbergmann/phpunit/issues/5472) | `TestCase::assertStringNotMatchesFormatFile()`                                         | 10.4.0 |                                                                            |
+| [#6046](https://github.com/sebastianbergmann/phpunit/issues/6046) | Using `assertContainsOnly()` and `assertNotContainsOnly()` with classes and interfaces | 11.5.0 | `assertContainsOnlyInstancesOf()` and `assertNotContainsOnlyInstancesOf()` |
 
 #### Test Double API
 

src/Framework/Assert.php

@@ -279,6 +279,13 @@ final public static function assertContainsOnly(string $type, iterable $haystack
             $isNativeType = self::isNativeType($type);
         }
 
+        if (!$isNativeType || class_exists($type) || interface_exists($type)) {
+            Event\Facade::emitter()->testTriggeredPhpunitDeprecation(
+                null,
+                'Using assertContainsOnly() with classes or interfaces is deprecated. Support for this will be removed in PHPUnit 12. Please use assertContainsOnlyInstancesOf() instead.',
+            );
+        }
+
         self::assertThat(
             $haystack,
             new TraversableContainsOnly(
@@ -325,6 +332,13 @@ final public static function assertNotContainsOnly(string $type, iterable $hayst
             $isNativeType = self::isNativeType($type);
         }
 
+        if (!$isNativeType || class_exists($type) || interface_exists($type)) {
+            Event\Facade::emitter()->testTriggeredPhpunitDeprecation(
+                null,
+                'Using assertNotContainsOnly() with classes or interfaces is deprecated. Support for this will be removed in PHPUnit 12. Please use assertContainsOnlyInstancesOf() instead.',
+            );
+        }
+
         self::assertThat(
             $haystack,
             new LogicalNot(

tests/unit/Framework/Assert/assertContainsOnlyTest.php

@@ -12,6 +12,7 @@
 use function fopen;
 use PHPUnit\Framework\Attributes\CoversMethod;
 use PHPUnit\Framework\Attributes\DataProvider;
+use PHPUnit\Framework\Attributes\IgnorePhpunitDeprecations;
 use PHPUnit\Framework\Attributes\Small;
 use PHPUnit\Framework\Attributes\TestDox;
 use stdClass;
@@ -20,6 +21,7 @@
 #[CoversMethod(Assert::class, 'isNativeType')]
 #[TestDox('assertContainsOnly()')]
 #[Small]
+#[IgnorePhpunitDeprecations]
 final class assertContainsOnlyTest extends TestCase
 {
     /**

tests/unit/Framework/Assert/assertNotContainsOnlyTest.php

@@ -11,13 +11,15 @@
 
 use PHPUnit\Framework\Attributes\CoversMethod;
 use PHPUnit\Framework\Attributes\DataProviderExternal;
+use PHPUnit\Framework\Attributes\IgnorePhpunitDeprecations;
 use PHPUnit\Framework\Attributes\Small;
 use PHPUnit\Framework\Attributes\TestDox;
 
 #[CoversMethod(Assert::class, 'assertNotContainsOnly')]
 #[CoversMethod(Assert::class, 'isNativeType')]
 #[TestDox('assertNotContainsOnly()')]
 #[Small]
+#[IgnorePhpunitDeprecations]
 final class assertNotContainsOnlyTest extends TestCase
 {
     #[DataProviderExternal(assertContainsOnlyTest::class, 'failureProvider')]