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test: improve coverage for events and runes

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This commit is contained in:
Ricardo Arturo Cabral Mejia
2022-08-27 03:36:37 +00:00
parent 262e00ad53
commit 376d0eb599
5 changed files with 316 additions and 53 deletions
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19
test/unit/utils/stream.spec.ts
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@ -2,7 +2,7 @@ import * as chai from 'chai'
import * as sinon from 'sinon'
import sinonChai from 'sinon-chai'
import { streamEach, streamEnd, streamMap } from '../../../src/utils/stream'
import { streamEach, streamEnd, streamFilter, streamMap } from '../../../src/utils/stream'
chai.use(sinonChai)
@ -54,3 +54,20 @@ describe('streamEnd', () => {
})
})
describe('streamFilter', () => {
it('passes elements that pass the given predicate downstream', () => {
const spy = sinon.spy()
const stream = streamFilter(({ a }) => a > 1 && a < 4)
stream.on('data', spy)
stream.write({ a: 1 })
stream.write({ a: 2 })
stream.write({ a: 3 })
stream.write({ a: 4 })
stream.end()
expect(spy).to.have.been.calledTwice
expect(spy.firstCall).to.have.been.calledWithExactly({ a: 2 })
expect(spy.secondCall).to.have.been.calledWithExactly({ a: 3 })
})
})