_moduleReaderMock = $this->createMock(\Magento\Framework\Module\Dir\Reader::class); $this->_moduleReaderMock->expects( $this->any() )->method( 'getModuleDir' )->with( 'etc', 'Magento_Config' )->will( $this->returnValue('schema_dir') ); $this->_model = new \Magento\Config\Model\Config\SchemaLocator($this->_moduleReaderMock); } public function testGetSchema() { $this->assertEquals('schema_dir/system.xsd', $this->_model->getSchema()); } public function testGetPerFileSchema() { $this->assertEquals('schema_dir/system_file.xsd', $this->_model->getPerFileSchema()); } }