/** * @covers \Magento\Framework\View\Design\Theme\Image::removePreviewImage */ public function testRemoveEmptyPreviewImage() { $this->_themeMock->setData($this->_getThemeSampleData()); $this->_themeMock->setData('preview_image', null); $this->_filesystemMock->expects($this->never())->method('delete'); $this->_model->removePreviewImage(); $this->assertNull($this->_themeMock->getData('preview_image')); }