                    value: `expect matrix on ${item.expect} due to\nl/r/t/b/w/h settings are:\n`
                                        + JSON.stringify(item.layout)
                                }]
                            }
                        })),

                        // z-order test
                        ...[{
                            matrixLayout: {
                                top: 10,
                                left: 10,
                                width: 300,
         