rx-assert
Helper methods for making asserts in unit tests for rxjs library.
Installation
npm install rx-assert
Description
This package provides a low level api for comparing observable sequences.
Can be used in unit tests for comparing observables.
Here is the wrapper around this library to use it as chai plugin - chai-rx-assert
Example:
const rxAssert = require('rx-assert');
const assert = require('chai').assert;
const Rx = require('rx');
const TestScheduler = Rx.TestScheduler;
const onNext = Rx.ReactiveTest.onNext;
const onError = Rx.ReactiveTest.onError;
const onCompleted = Rx.ReactiveTest.onCompleted;
const subscribe = Rx.ReactiveTest.subscribe;
describe('getDelayedStream', () => {
it('should return messages with delay', () => {
const scheduler = new TestScheduler();
const xs = scheduler.createHotObservable(
onNext(150, 1),
onNext(250, 2),
onNext(350, 3),
onNext(450, 4),
onCompleted(550)
);
const results = scheduler.startScheduler(() => {
return xs.delay(100, scheduler);
});
const expected = [
onNext(350, 2),
onNext(450, 3),
onNext(550, 4),
onCompleted(650)
]
const [equal, message] = rxAssert.isEqual(results.messages, expected);
assert.isOk(equal, message)
});
});Methods
isEqual(actual, expected)
- @param {List} actual List with notification records (onNext(), onCompleted e.t.c)
- @param {List} expected List with notification records (onNext(), onCompleted e.t.c)
- @return {List} List with 2 elements - [isEqual {bool}, diffMessage {String}]
First element defines wether actual and expected sequences are equal.
The second one provides a diff message.
Example:
const xs = scheduler.createHotObservable(
onNext(150, 1),
onNext(250, 2),
onNext(350, 3),
onNext(450, 4),
onCompleted(550)
);
const results = scheduler.startScheduler(() => {
return xs.delay(100, scheduler);
});
const expected = [
onNext(350, 2),
onNext(450, 3),
onNext(550, 4),
onCompleted(650)
]
const [equal, message] = rxAssert.isEqual(results.messages, expected);Dev info
Installation
git clone
cd
npm install .Test coverage
Contributions are welcome. Dont forget to check the tests.
npm test