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Last active September 20, 2017 22:31
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Testing Filter Expressions in the Browser Console
  1. Open the DevTools and go into the settings via the Gear Icon

  2. Ensure "Enable browser chrome and add-on debugging toolboxes" is checked.

  3. Open the browser console

    • Tools > Web Developer > Browser Console
    • Cmd + Shift + J
  4. Run the following in the console:

    Cu.import("resource://shield-recipe-client/lib/RecipeRunner.jsm", {}).RecipeRunner.checkFilter({
      id: 1,
      arguments: {},
      filter_expression: FILTER_TO_TEST,
    }).then(result => console.log(result))

    For example:

    Cu.import("resource://shield-recipe-client/lib/RecipeRunner.jsm", {}).RecipeRunner.checkFilter({
      id: 1,
      arguments: {},
      filter_expression: 'true',
    }).then(result => console.log(result))

    You can use backticks for multi-line expressions:

    Cu.import("resource://shield-recipe-client/lib/RecipeRunner.jsm", {}).RecipeRunner.checkFilter({
      id: 1,
      arguments: {},
      filter_expression: `
        (
          true &&
          normandy.country == "US"
        )
      `,
    }).then(result => console.log(result))
  5. The console will output a Promise object, and then log true or false depending on whether the expression passed for your client or not.

Notes

  • Certain filters, particular filters that involve normandy.recipe, may not work as expected, as they rely on the id and arguments fields passed in.
  • If you are using time-based or geolocation-based filters, which rely on the Normandy service, this method may fail if you've configured Firefox to point towards a local instance of Normandy which is not running.
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