@serenity-js/assertions
Version:
Serenity/JS universal assertion library supporting all types of functional tests, including both web and REST API scenarios
51 lines • 1.72 kB
JavaScript
;
Object.defineProperty(exports, "__esModule", { value: true });
exports.not = not;
const core_1 = require("@serenity-js/core");
/**
* Produces an [expectation](https://serenity-js.org/api/core/class/Expectation/) that negates the provided `expectation`.
*
* ## Ensuring that the actual value does not equal the expected value
*
* ```ts
* import { actorCalled } from '@serenity-js/core'
* import { Ensure, equals, not } from '@serenity-js/assertions'
*
* const actual = { name: 'apples' }
* const expected = { name: 'bananas' }
*
* await actorCalled('Ester').attemptsTo(
* Ensure.that(actual, not(equals(expected))),
* )
* ```
*
* @param expectation
*
* @group Expectations
*/
function not(expectation) {
return new Not(expectation);
}
/**
* @package
*/
class Not extends core_1.Expectation {
expectation;
static flipped(message) {
return message.startsWith('not ')
? message.slice(4)
: `not ${message}`;
}
constructor(expectation) {
super('not', Not.flipped(expectation.toString()), async (actor, actual) => {
const subject = Not.flipped(expectation.toString());
const outcome = await actor.answer(expectation.isMetFor(actual));
const expectationDetails = core_1.ExpectationDetails.of('not', outcome.expectation);
return outcome instanceof core_1.ExpectationNotMet
? new core_1.ExpectationMet(subject, expectationDetails, outcome.expected, outcome.actual)
: new core_1.ExpectationNotMet(subject, expectationDetails, outcome.expected, outcome.actual);
});
this.expectation = expectation;
}
}
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