Add test

Author: sebastianbergmann

tests/unit/Framework/MockObject/Creation/MockBuilderTest.php

@@ -20,6 +20,7 @@
 use PHPUnit\Framework\Attributes\Group;
 use PHPUnit\Framework\Attributes\Medium;
 use PHPUnit\Framework\Attributes\TestDox;
+use PHPUnit\Framework\MockObject\Generator\DuplicateMethodException;
 use PHPUnit\Framework\MockObject\Generator\NameAlreadyInUseException;
 use PHPUnit\Framework\TestCase;
 use PHPUnit\TestFixture\MockObject\AbstractClass;
@@ -28,6 +29,7 @@
 use PHPUnit\TestFixture\MockObject\TraitWithConcreteAndAbstractMethod;
 
 #[CoversClass(MockBuilder::class)]
+#[CoversClass(DuplicateMethodException::class)]
 #[CoversClass(NameAlreadyInUseException::class)]
 #[CoversClass(CannotUseAddMethodsException::class)]
 #[Group('test-doubles')]
@@ -82,6 +84,16 @@ public function testCannotCreateMockObjectForExtendableClassAddingMethodsToItTha
             ->getMock();
     }
 
+    #[TestDox('addMethods() cannot be used to configure an additional method for the mock object class multiple times using the same name')]
+    public function testCannotCreateMockObjectForExtendableClassAddingMultipleMethodsWithSameNameToIt(): void
+    {
+        $this->expectException(DuplicateMethodException::class);
+
+        $this->getMockBuilder(ExtendableClass::class)
+            ->addMethods(['additionalMethod', 'additionalMethod'])
+            ->getMock();
+    }
+
     #[TestDox('getMockForAbstractClass() can be used to create a mock object for an abstract class')]
     public function testCreatesMockObjectForAbstractClassAndAllowsConfigurationOfAbstractMethods(): void
     {