another_number(value: number): this {
this.number2 = value;
return this;
}
they_are_summed(): this {
this.result = sum(this.number1, this.number2);
return this;
}
the_result_is(expectedResult: number): this {
expect(this.result).toEqual(expectedResult);
return this;
}
}
scenarios('sum', SumStage, ({ given, when, then }) => {
return {
two_numbers_can_be_added: scenario({}, () => {
given()
.a_number(1)
.and()
.another_number(2);
when().they_are_summed();
then().the_result_is(3);
}),
};
});
}
they_are_summed(): this {
this.result = sum(this.number1, this.number2);
return this;
}
the_result_is(expectedResult: number): this {
expect(this.result).toEqual(expectedResult);
return this;
}
}
scenarios('sum-parametrized', SumStage, ({ given, when, then }) => {
return {
two_numbers_can_be_added: scenario(
{},
parametrized3([[1, 2, 3], [2, 3, 5]], (x, y, result) => {
given()
.a_number(x)
.and()
.another_number(y);
when().they_are_summed();
then().the_result_is(result);
})
),
};
});
}
}
class SumThenStage extends Stage {
@State result: number;
the_result_is(expectedResult: number): this {
expect(this.result).toEqual(expectedResult);
return this;
}
}
scenarios(
'sum-multiple-stages',
[SumGivenStage, SumWhenStage, SumThenStage],
({ given, when, then }) => {
return {
two_numbers_can_be_added: scenario({}, () => {
given()
.a_number(1)
.and()
.another_number(2);
when().they_are_summed();
then().the_result_is(3);
}),
};
}
);
});
return this;
}
the_status_code_is(expectedStatusCode: number): this {
expect(this.statusCode).toEqual(expectedStatusCode);
return this;
}
}
scenarios('async', AsyncStage, ({ given, when, then }) => {
return {
an_async_scenario_can_be_executed: scenario({}, () => {
given().the_url('https://jsgiven.org');
when().making_an_http_request_to_that_url();
then().the_status_code_is(200);
}),
};
});
class PromiseStage extends Stage {
url: string;
statusCode: number;
the_url(url: string): this {
this.url = url;
return this;
}