This test verifies the position and size of the highlight rectangles overlayed on an inspected CSS flex div.

flex-container{
  "paths": [
    {
      "path": [
        "M",
        8,
        8,
        "L",
        508,
        8,
        "L",
        508,
        108,
        "L",
        8,
        108,
        "Z"
      ],
      "fillColor": "rgba(255, 0, 0, 0)",
      "outlineColor": "rgba(128, 0, 0, 0)",
      "name": "content"
    },
    {
      "path": [
        "M",
        8,
        8,
        "L",
        508,
        8,
        "L",
        508,
        108,
        "L",
        8,
        108,
        "Z"
      ],
      "fillColor": "rgba(0, 255, 0, 0)",
      "name": "padding"
    },
    {
      "path": [
        "M",
        8,
        8,
        "L",
        508,
        8,
        "L",
        508,
        108,
        "L",
        8,
        108,
        "Z"
      ],
      "fillColor": "rgba(0, 0, 255, 0)",
      "name": "border"
    },
    {
      "path": [
        "M",
        8,
        8,
        "L",
        508,
        8,
        "L",
        508,
        108,
        "L",
        8,
        108,
        "Z"
      ],
      "fillColor": "rgba(255, 255, 255, 0)",
      "name": "margin"
    }
  ],
  "showRulers": true,
  "showExtensionLines": true,
  "showAccessibilityInfo": true,
  "colorFormat": "hex",
  "elementInfo": {
    "tagName": "div",
    "idValue": "flex-container",
    "nodeWidth": "500",
    "nodeHeight": "100",
    "isKeyboardFocusable": false,
    "accessibleName": "",
    "accessibleRole": "generic",
    "layoutObjectName": "LayoutFlexibleBox",
    "showAccessibilityInfo": true
  },
  "flexInfo": [
    {
      "containerBorder": [
        "M",
        8,
        8,
        "L",
        508,
        8,
        "L",
        508,
        108,
        "L",
        8,
        108,
        "Z"
      ],
      "lines": [
        [
          {
            "itemBorder": [
              "M",
              8,
              8,
              "L",
              174.65625,
              8,
              "L",
              174.65625,
              108,
              "L",
              8,
              108,
              "Z"
            ],
            "baseline": 90
          },
          {
            "itemBorder": [
              "M",
              174.65625,
              8,
              "L",
              341.328125,
              8,
              "L",
              341.328125,
              108,
              "L",
              174.65625,
              108,
              "Z"
            ],
            "baseline": 90
          },
          {
            "itemBorder": [
              "M",
              341.328125,
              8,
              "L",
              508,
              8,
              "L",
              508,
              108,
              "L",
              341.328125,
              108,
              "Z"
            ],
            "baseline": 90
          }
        ]
      ],
      "isHorizontalFlow": true,
      "isReverse": false,
      "alignItemsStyle": "normal",
      "mainGap": 0,
      "crossGap": 0,
      "flexContainerHighlightConfig": {
        "containerBorder": {
          "color": "rgba(255, 0, 0, 0)",
          "pattern": "solid"
        },
        "lineSeparator": {
          "color": "rgba(255, 0, 0, 0)",
          "pattern": "solid"
        },
        "itemSeparator": {
          "color": "rgba(255, 0, 0, 0)",
          "pattern": "solid"
        },
        "mainDistributedSpace": {
          "fillColor": "rgba(255, 0, 0, 0)",
          "hatchColor": "rgba(255, 0, 0, 0)"
        },
        "crossDistributedSpace": {
          "fillColor": "rgba(255, 0, 0, 0)",
          "hatchColor": "rgba(255, 0, 0, 0)"
        },
        "rowGapSpace": {
          "fillColor": "rgba(255, 0, 0, 0)",
          "hatchColor": "rgba(255, 0, 0, 0)"
        },
        "columnGapSpace": {
          "fillColor": "rgba(255, 0, 0, 0)",
          "hatchColor": "rgba(255, 0, 0, 0)"
        },
        "crossAlignment": {
          "color": "rgba(255, 0, 0, 0)",
          "pattern": "solid"
        }
      }
    }
  ]
}
should-not-be-flexbox{
  "paths": [
    {
      "path": [
        "M",
        8,
        108,
        "L",
        58,
        108,
        "L",
        58,
        158,
        "L",
        8,
        158,
        "Z"
      ],
      "fillColor": "rgba(255, 0, 0, 0)",
      "outlineColor": "rgba(128, 0, 0, 0)",
      "name": "content"
    },
    {
      "path": [
        "M",
        8,
        108,
        "L",
        58,
        108,
        "L",
        58,
        158,
        "L",
        8,
        158,
        "Z"
      ],
      "fillColor": "rgba(0, 255, 0, 0)",
      "name": "padding"
    },
    {
      "path": [
        "M",
        8,
        108,
        "L",
        58,
        108,
        "L",
        58,
        158,
        "L",
        8,
        158,
        "Z"
      ],
      "fillColor": "rgba(0, 0, 255, 0)",
      "name": "border"
    },
    {
      "path": [
        "M",
        8,
        108,
        "L",
        58,
        108,
        "L",
        58,
        158,
        "L",
        8,
        158,
        "Z"
      ],
      "fillColor": "rgba(255, 255, 255, 0)",
      "name": "margin"
    }
  ],
  "showRulers": true,
  "showExtensionLines": true,
  "showAccessibilityInfo": true,
  "colorFormat": "hex",
  "elementInfo": {
    "tagName": "button",
    "idValue": "should-not-be-flexbox",
    "nodeWidth": "50",
    "nodeHeight": "50",
    "isKeyboardFocusable": true,
    "accessibleName": "click",
    "accessibleRole": "button",
    "layoutObjectName": "LayoutBlockFlow",
    "showAccessibilityInfo": true
  }
}