parameterized-scenarios.test.js

import {
  scenario,
  scenarios,
  setupForRspec,
  parametrized,
  parametrized1,
  Stage,
} from 'js-given';

setupForRspec(describe, it);

// tag::DemoStage[]
class DemoStage extends Stage {
  number1;
  number2;
  result;

  a_number(value) {
    this.number1 = value;
    return this;
  }

  another_number(value) {
    this.number2 = value;
    return this;
  }

  they_are_summed() {
    this.result = this.number1 + this.number2;
    return this;
  }

  the_result_is(expectedResult) {
    expect(this.result).toEqual(expectedResult);
    return this;
  }

  they_are_successfully_added(): this {
    expect(this.result).toEqual(this.number1 + this.number2);
    return this;
  }
}
// end::DemoStage[]

// tag::ParametrizedScenario[]
scenarios('parametrized-scenarios', DemoStage, ({ given, when, then }) => {
  return {
    scenarios_can_be_parametrized: scenario(
      {},
      parametrized([[1, 2], [2, 4], [3, 6]], (value, result) => {
        given()
          .a_number(value)
          .and()
          .another_number(value);
        when().they_are_summed();
        then().the_result_is(result);
      })
    ),
  };
});
// end::ParametrizedScenario[]

// tag::Parametrized1Scenario[]
scenarios('parametrized-scenarios', DemoStage, ({ given, when, then }) => {
  return {
    scenarios_can_be_parametrized_with_only_one_value: scenario(
      {},
      parametrized1([1, 2, 3], value => {
        given()
          .a_number(value)
          .and()
          .another_number(value);
        when().they_are_summed();
        then().they_are_successfully_added();
      })
    ),
  };
});
// end::Parametrized1Scenario[]