+ // Submit the form using the button id.
+ $edit = ['bananas' => 'blue'];
+ $result = $this->drupalPostForm('form-test/object-builder', $edit, 'edit-submit');
+ $this->assertSame($this->getSession()->getPage()->getContent(), $result);
+ $value = $config_factory->get('form_test.object')->get('bananas');
+ $this->assertSame('blue', $value);
+
+ // Submit the form using the button name.
+ $edit = ['bananas' => 'purple'];
+ $result = $this->drupalPostForm('form-test/object-builder', $edit, 'op');
+ $this->assertSame($this->getSession()->getPage()->getContent(), $result);
+ $value = $config_factory->get('form_test.object')->get('bananas');
+ $this->assertSame('purple', $value);
+