test: Proof @param ?string is supported in current setup

Author: DannyvdSluijs

tests/DispatcherTest.php

@@ -72,5 +72,10 @@ public function testCallMethodWithTypeHintWithNamedArgsOnNestedTarget()
         $this->assertEquals($this->callsOfNestedTarget, [new MethodCall('someMethodWithTypeHint', [new Argument('whatever')])]);
     }
 
-
+    public function testSomeMethodWithNullableTypeParamTag(): void
+    {
+        $result = $this->dispatcher->dispatch((string)new Request(1, 'someMethodWithNullableTypeParamTag', ['arg' => null]));
+        $this->assertEquals('Hello World', $result);
+        $this->assertEquals($this->calls, [new MethodCall('someMethodWithNullableTypeParamTag', [null])]);
+    }
 }

tests/Target.php

@@ -49,4 +49,13 @@ public function someMethodWithDifferentlyTypedArgs(string $arg1 = null, int $arg
         $this->calls[] = new MethodCall('someMethodWithDifferentlyTypedArgs', func_get_args());
         return 'Hello World';
     }
+
+    /**
+     * @param ?string $arg
+     */
+    public function someMethodWithNullableTypeParamTag($arg): string
+    {
+        $this->calls[] = new MethodCall('someMethodWithNullableTypeParamTag', func_get_args());
+        return 'Hello World';
+    }
 }