SUPPORT - How to set misMatchThreshold

[omarlopesino]

Hi. I would like to know how to set the misMatchThreshold parameter. I've tried to set it up following README configuration without success. How can I do it?

System specs

BackstopJS 6.3.7

SO: Debian 12

What I've tried

I've tried to:

• SEt defaultMisMatchThreshold: 1 at root composer.json:

{
...
  "defaultMisMatchThreshold": 1,
...
}

• Set misMatchThreshold: 1 at scenarioDefaults:

  "onBeforeScript": "puppet/onBefore.js",
  "onReadyScript": "puppet/onReady.js",
  "scenarioDefaults": {
    "misMatchThreshold": 1
  },

Force use precise matching in resemble options:

  "resembleOutputOptions": {
    "usePreciseMatching": true
  },

• Set misMatchThreshold: 1 at scenario configuration:

    {
      "label": "Components 1",
      "cookiePath": "engine_scripts/cookies.json",
      "url": "https://web//components-1",
      "selectorExpansion": true,
      "readySelector": "body",
      "misMatchThreshold": 10
    },

• Set requireSameDimensions as false at the same levels (defaultRequireSameDimensions, scenarioDefaults and scenario level).

After trying all this, the result is always , in the error output, that the threshold is 0.1:

ERROR { requireSameDimensions: true, size: isDifferent, content: 0.13%, threshold: 0.1% }:

[GueGuerreiro]

You are using a very old version of Backstop. It's possible the default scenarios hadn't been properly implemented yet. I think if you update to the latest (6.3.25) you won't have such issues anymore 👍