Add ability to check for multiple Extends

README.md

@@ -186,6 +186,8 @@ $rules[] = Rule::allClasses()
     ->that(new ResideInOneOfTheseNamespaces('App\Controller'))
     ->should(new Extend('App\Controller\AbstractController'))
     ->because('we want to be sure that all controllers extend AbstractController');
+
+You can add multiple parameters, the violation will happen when none of them match
 ```
 
 ### Has an attribute (requires PHP >= 8.0)

src/Expression/ForClasses/Extend.php

@@ -13,25 +13,30 @@
 
 class Extend implements Expression
 {
-    /** @var string */
-    private $className;
+    /** @var string[] */
+    private $classNames;
 
-    public function __construct(string $className)
+    public function __construct(string ...$classNames)
     {
-        $this->className = $className;
+        $this->classNames = $classNames;
     }
 
     public function describe(ClassDescription $theClass, string $because): Description
     {
-        return new Description("should extend {$this->className}", $because);
+        $desc = implode(', ', $this->classNames);
+
+        return new Description("should extend one of these classes: {$desc}", $because);
     }
 
     public function evaluate(ClassDescription $theClass, Violations $violations, string $because): void
     {
         $extends = $theClass->getExtends();
 
-        if (null !== $extends && $extends->matches($this->className)) {
-            return;
+        /** @var string $className */
+        foreach ($this->classNames as $className) {
+            if (null !== $extends && $extends->matches($className)) {
+                return;
+            }
         }
 
         $violation = Violation::create(

tests/Unit/Expressions/ForClasses/ExtendTest.php

@@ -70,7 +70,7 @@ public function test_it_should_return_violation_error_when_class_not_extend(): v
         $extend->evaluate($classDescription, $violations, 'we want to add this rule for our software');
 
         self::assertEquals(1, $violations->count());
-        self::assertEquals('should extend My\BaseClass because we want to add this rule for our software', $violations->get(0)->getError());
+        self::assertEquals('should extend one of these classes: My\BaseClass because we want to add this rule for our software', $violations->get(0)->getError());
     }
 
     public function test_it_should_return_violation_error_if_extend_is_null(): void
@@ -97,6 +97,21 @@ public function test_it_should_return_violation_error_if_extend_is_null(): void
         $extend->evaluate($classDescription, $violations, $because);
 
         self::assertEquals(1, $violations->count());
-        self::assertEquals('should extend My\BaseClass because we want to add this rule for our software', $violationError);
+        self::assertEquals('should extend one of these classes: My\BaseClass because we want to add this rule for our software', $violationError);
+    }
+
+    public function test_it_should_accept_multiple_extends(): void
+    {
+        $extend = new Extend('My\FirstExtend', 'My\SecondExtend');
+
+        $classDescription = (new ClassDescriptionBuilder())
+            ->setClassName('My\Class')
+            ->setExtends('My\SecondExtend', 10)
+            ->build();
+
+        $violations = new Violations();
+        $extend->evaluate($classDescription, $violations, 'because');
+
+        self::assertEquals(0, $violations->count());
     }
 }