QA Mode

[jdorn]

Make it easier to test experiments during automated testing. Example below uses Jest, but these new helper methods and qa flag should be applicable to any testing library.

describe('my app', () => {
  beforeAll(() => {
    // Flag to turn on QA mode
    // Force variation -1 for all experiments unless explicitly forced to something else
    // Disable auto experiments
    client.config.qa = true;
  })
  beforeEach(() => {
    // Undo any forces applied within test cases
    client.forcedVariations.clear();
  })

  it("works for control", () => {
    // test the control behavior
  })

  it("works for variation", () => {
    // force a non-control variation
    client.forceVariations.set("my-test", 1);

    // test the variation 1 behavior
  })
})