Add test

Author: VincentLanglet

tests/PHPStan/Rules/Pure/PureMethodRuleTest.php

@@ -268,6 +268,10 @@ public function testAllMethodsArePure(): void
 				'Impure call to method AllMethodsArePure\Test::impure() in pure method AllMethodsArePure\SideEffectImpure::pureWithImpure().',
 				148,
 			],
+			[
+				'Impure call to method AllMethodsArePure\FooWithMixed::impureMethod() in pure method AllMethodsArePure\FooWithMixed::testMixed().',
+				163,
+			],
 		]);
 	}
 

tests/PHPStan/Rules/Pure/data/all-methods-are-pure.php

@@ -152,3 +152,21 @@ public function pureWithPure(): int {
 		Test::pure();
 	}
 }
+
+/**
+ * @phpstan-all-methods-pure
+ */
+final class FooWithMixed
+{
+	public function testMixed(): mixed
+	{
+		return $this->impureMethod();
+	}
+
+	/**
+	 * @phpstan-impure
+	 */
+	public function impureMethod(): mixed {
+		return time();
+	}
+}