Adds a __toString() method that proxies to the decorated input

Signed-off-by: George Steel <[email protected]>

src/Input/AbstractParamAwareInput.php

@@ -307,8 +307,11 @@ static function (mixed $value) use ($originalValidator) {
         return $originalValidator;
     }
 
+    /**
+     * Returns a stringified representation of the args passed to the command.
+     */
     public function __toString(): string
     {
-        return '';
+        return $this->input->__toString();
     }
 }

test/Input/ParamAwareInputTest.php

@@ -18,6 +18,7 @@
 use ReflectionMethod;
 use Symfony\Component\Console\Formatter\NullOutputFormatter;
 use Symfony\Component\Console\Helper\QuestionHelper;
+use Symfony\Component\Console\Input\ArrayInput;
 use Symfony\Component\Console\Input\InputDefinition;
 use Symfony\Component\Console\Input\InputInterface;
 use Symfony\Component\Console\Input\StreamableInputInterface;
@@ -636,4 +637,24 @@ public function testGetParamAllowsEmptyValuesForParamsWithValidationIfParamIsNot
 
         $this->assertNull($input->getParam('non-required'));
     }
+
+    public function testThatCastingToAStringProxiesToTheUnderlyingInputImplementation(): void
+    {
+        /**
+         * Mocking a concrete class here because `__toString` is not part of the InputInterface contract
+         */
+        $decoratedInput = $this->createMock(ArrayInput::class);
+        $decoratedInput->expects(self::atLeastOnce())
+            ->method('__toString')
+            ->willReturn('something');
+
+        $input = new $this->class(
+            $decoratedInput,
+            $this->output,
+            $this->helper,
+            $this->params,
+        );
+
+        self::assertSame('something', $input->__toString());
+    }
 }