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AsyncTask.test.js
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AsyncTask.test.js
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import { strictEqual, notStrictEqual, stringifyEqual } from 'source/common/verify'
import { setTimeoutAsync } from 'source/common/time'
import {
ASYNC_TASK_PHASE_MAP,
ASYNC_TASK_KEY_MAP,
getAsyncTaskPhase,
runAsyncTask,
resetAsyncTask
} from './AsyncTask'
const { describe, it } = global
const { IDLE, RUN, DONE } = ASYNC_TASK_PHASE_MAP
const { PLAN, PLAN_PROMISE, QUERY, PROMISE, OUTPUT } = ASYNC_TASK_KEY_MAP
const extraValue = {}
const outputResult = { output: 'result' }
const outputError = new Error('output')
const asyncTaskPlan = (asyncTask) => {
let queryCount = 0
let bail = false
return {
[ PLAN_PROMISE ]: setTimeoutAsync(32).then(() => {
if (bail) throw outputError
return outputResult
}),
[ QUERY ]: async (type) => {
if (asyncTask[ OUTPUT ]) return 'already done'
if (type === 'bail') bail = true
return queryCount++
},
extraValue
}
}
const getAsyncTask = () => ({ [ PLAN ]: asyncTaskPlan })
describe('source/common/module/AsyncTask', () => {
it('basic usage', async () => {
const asyncTask = getAsyncTask()
strictEqual(getAsyncTaskPhase(asyncTask), IDLE)
const promise = runAsyncTask(asyncTask)
strictEqual(getAsyncTaskPhase(asyncTask), RUN)
strictEqual(promise, asyncTask[ PROMISE ])
strictEqual(asyncTask.extraValue, extraValue, 'allow introduce new data, maybe a bad idea')
const queryResultList = [
await asyncTask[ QUERY ](''),
await asyncTask[ QUERY ](''),
await asyncTask[ QUERY ]('')
]
// console.log(queryResultList)
stringifyEqual(queryResultList, [ 0, 1, 2 ])
strictEqual(getAsyncTaskPhase(asyncTask), RUN) // should not take 32ms yet
const output = await promise
// console.log(output)
stringifyEqual(output, { result: outputResult, error: undefined })
strictEqual(getAsyncTaskPhase(asyncTask), DONE)
strictEqual(output, asyncTask[ OUTPUT ])
strictEqual(await asyncTask[ QUERY ](''), 'already done')
})
it('output for error', async () => {
const asyncTask = getAsyncTask()
const promise = runAsyncTask(asyncTask)
const queryResultList = [
await asyncTask[ QUERY ](''),
await asyncTask[ QUERY ]('bail'),
await asyncTask[ QUERY ]('')
]
stringifyEqual(queryResultList, [ 0, 1, 2 ])
const output = await promise
stringifyEqual(output, { result: undefined, error: outputError })
})
it('direct error', async () => {
const promise = runAsyncTask({
[ PLAN ]: () => ({
[ PLAN_PROMISE ]: Promise.reject(outputError),
[ QUERY ]: async (type) => {}
})
})
const output = await promise
stringifyEqual(output, { result: undefined, error: outputError })
})
it('resetAsyncTask', async () => {
const asyncTask = getAsyncTask()
await runAsyncTask(asyncTask)
strictEqual(getAsyncTaskPhase(asyncTask), DONE)
const asyncTaskNew = resetAsyncTask(asyncTask)
notStrictEqual(asyncTaskNew, asyncTask, 'should return different object')
strictEqual(getAsyncTaskPhase(asyncTaskNew), IDLE, 'should reset non-idle phase data')
})
})