572 lines
13 KiB
TypeScript
572 lines
13 KiB
TypeScript
import {
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queueJob,
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nextTick,
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queuePostFlushCb,
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invalidateJob,
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queuePreFlushCb,
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flushPreFlushCbs,
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flushPostFlushCbs
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} from '../src/scheduler'
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describe('scheduler', () => {
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it('nextTick', async () => {
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const calls: string[] = []
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const dummyThen = Promise.resolve().then()
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const job1 = () => {
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calls.push('job1')
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}
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const job2 = () => {
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calls.push('job2')
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}
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nextTick(job1)
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job2()
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expect(calls.length).toBe(1)
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await dummyThen
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// job1 will be pushed in nextTick
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expect(calls.length).toBe(2)
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expect(calls).toMatchObject(['job2', 'job1'])
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})
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describe('queueJob', () => {
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it('basic usage', async () => {
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const calls: string[] = []
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const job1 = () => {
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calls.push('job1')
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}
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const job2 = () => {
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calls.push('job2')
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}
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queueJob(job1)
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queueJob(job2)
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expect(calls).toEqual([])
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await nextTick()
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expect(calls).toEqual(['job1', 'job2'])
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})
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it("should insert jobs in ascending order of job's id when flushing", async () => {
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const calls: string[] = []
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const job1 = () => {
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calls.push('job1')
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queueJob(job2)
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queueJob(job3)
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queueJob(job4)
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}
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const job2 = () => {
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calls.push('job2')
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}
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job2.id = 10
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const job3 = () => {
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calls.push('job3')
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}
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job3.id = 1
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// job4 gets the Infinity as it's id
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const job4 = () => {
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calls.push('job4')
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}
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queueJob(job1)
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expect(calls).toEqual([])
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await nextTick()
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expect(calls).toEqual(['job1', 'job3', 'job2', 'job4'])
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})
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it('should dedupe queued jobs', async () => {
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const calls: string[] = []
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const job1 = () => {
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calls.push('job1')
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}
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const job2 = () => {
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calls.push('job2')
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}
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queueJob(job1)
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queueJob(job2)
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queueJob(job1)
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queueJob(job2)
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expect(calls).toEqual([])
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await nextTick()
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expect(calls).toEqual(['job1', 'job2'])
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})
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it('queueJob while flushing', async () => {
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const calls: string[] = []
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const job1 = () => {
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calls.push('job1')
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// job2 will be executed after job1 at the same tick
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queueJob(job2)
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}
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const job2 = () => {
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calls.push('job2')
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}
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queueJob(job1)
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await nextTick()
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expect(calls).toEqual(['job1', 'job2'])
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})
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})
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describe('queuePreFlushCb', () => {
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it('basic usage', async () => {
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const calls: string[] = []
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const cb1 = () => {
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calls.push('cb1')
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}
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const cb2 = () => {
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calls.push('cb2')
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}
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queuePreFlushCb(cb1)
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queuePreFlushCb(cb2)
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expect(calls).toEqual([])
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await nextTick()
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expect(calls).toEqual(['cb1', 'cb2'])
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})
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it('should dedupe queued preFlushCb', async () => {
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const calls: string[] = []
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const cb1 = () => {
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calls.push('cb1')
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}
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const cb2 = () => {
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calls.push('cb2')
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}
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const cb3 = () => {
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calls.push('cb3')
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}
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queuePreFlushCb(cb1)
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queuePreFlushCb(cb2)
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queuePreFlushCb(cb1)
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queuePreFlushCb(cb2)
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queuePreFlushCb(cb3)
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expect(calls).toEqual([])
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await nextTick()
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expect(calls).toEqual(['cb1', 'cb2', 'cb3'])
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})
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it('chained queuePreFlushCb', async () => {
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const calls: string[] = []
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const cb1 = () => {
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calls.push('cb1')
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// cb2 will be executed after cb1 at the same tick
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queuePreFlushCb(cb2)
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}
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const cb2 = () => {
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calls.push('cb2')
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}
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queuePreFlushCb(cb1)
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await nextTick()
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expect(calls).toEqual(['cb1', 'cb2'])
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})
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})
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describe('queueJob w/ queuePreFlushCb', () => {
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it('queueJob inside preFlushCb', async () => {
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const calls: string[] = []
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const job1 = () => {
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calls.push('job1')
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}
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const cb1 = () => {
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// queueJob in postFlushCb
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calls.push('cb1')
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queueJob(job1)
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}
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queuePreFlushCb(cb1)
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await nextTick()
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expect(calls).toEqual(['cb1', 'job1'])
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})
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it('queueJob & preFlushCb inside preFlushCb', async () => {
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const calls: string[] = []
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const job1 = () => {
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calls.push('job1')
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}
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const cb1 = () => {
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calls.push('cb1')
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queueJob(job1)
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// cb2 should execute before the job
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queuePreFlushCb(cb2)
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}
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const cb2 = () => {
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calls.push('cb2')
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}
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queuePreFlushCb(cb1)
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await nextTick()
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expect(calls).toEqual(['cb1', 'cb2', 'job1'])
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})
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it('preFlushCb inside queueJob', async () => {
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const calls: string[] = []
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const job1 = () => {
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// the only case where a pre-flush cb can be queued inside a job is
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// when updating the props of a child component. This is handled
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// directly inside `updateComponentPreRender` to avoid non atomic
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// cb triggers (#1763)
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queuePreFlushCb(cb1)
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queuePreFlushCb(cb2)
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flushPreFlushCbs(undefined, job1)
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calls.push('job1')
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}
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const cb1 = () => {
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calls.push('cb1')
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// a cb triggers its parent job, which should be skipped
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queueJob(job1)
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}
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const cb2 = () => {
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calls.push('cb2')
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}
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queueJob(job1)
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await nextTick()
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expect(calls).toEqual(['cb1', 'cb2', 'job1'])
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})
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// #3806
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it('queue preFlushCb inside postFlushCb', async () => {
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const cb = jest.fn()
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queuePostFlushCb(() => {
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queuePreFlushCb(cb)
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})
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await nextTick()
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expect(cb).toHaveBeenCalled()
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})
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})
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describe('queuePostFlushCb', () => {
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it('basic usage', async () => {
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const calls: string[] = []
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const cb1 = () => {
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calls.push('cb1')
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}
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const cb2 = () => {
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calls.push('cb2')
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}
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const cb3 = () => {
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calls.push('cb3')
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}
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queuePostFlushCb([cb1, cb2])
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queuePostFlushCb(cb3)
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expect(calls).toEqual([])
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await nextTick()
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expect(calls).toEqual(['cb1', 'cb2', 'cb3'])
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})
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it('should dedupe queued postFlushCb', async () => {
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const calls: string[] = []
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const cb1 = () => {
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calls.push('cb1')
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}
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const cb2 = () => {
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calls.push('cb2')
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}
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const cb3 = () => {
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calls.push('cb3')
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}
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queuePostFlushCb([cb1, cb2])
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queuePostFlushCb(cb3)
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queuePostFlushCb([cb1, cb3])
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queuePostFlushCb(cb2)
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expect(calls).toEqual([])
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await nextTick()
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expect(calls).toEqual(['cb1', 'cb2', 'cb3'])
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})
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it('queuePostFlushCb while flushing', async () => {
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const calls: string[] = []
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const cb1 = () => {
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calls.push('cb1')
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// cb2 will be executed after cb1 at the same tick
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queuePostFlushCb(cb2)
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}
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const cb2 = () => {
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calls.push('cb2')
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}
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queuePostFlushCb(cb1)
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await nextTick()
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expect(calls).toEqual(['cb1', 'cb2'])
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})
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})
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describe('queueJob w/ queuePostFlushCb', () => {
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it('queueJob inside postFlushCb', async () => {
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const calls: string[] = []
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const job1 = () => {
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calls.push('job1')
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}
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const cb1 = () => {
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// queueJob in postFlushCb
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calls.push('cb1')
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queueJob(job1)
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}
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queuePostFlushCb(cb1)
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await nextTick()
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expect(calls).toEqual(['cb1', 'job1'])
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})
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it('queueJob & postFlushCb inside postFlushCb', async () => {
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const calls: string[] = []
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const job1 = () => {
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calls.push('job1')
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}
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const cb1 = () => {
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calls.push('cb1')
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queuePostFlushCb(cb2)
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// job1 will executed before cb2
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// Job has higher priority than postFlushCb
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queueJob(job1)
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}
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const cb2 = () => {
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calls.push('cb2')
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}
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queuePostFlushCb(cb1)
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await nextTick()
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expect(calls).toEqual(['cb1', 'job1', 'cb2'])
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})
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it('postFlushCb inside queueJob', async () => {
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const calls: string[] = []
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const job1 = () => {
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calls.push('job1')
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// postFlushCb in queueJob
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queuePostFlushCb(cb1)
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}
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const cb1 = () => {
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calls.push('cb1')
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}
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queueJob(job1)
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await nextTick()
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expect(calls).toEqual(['job1', 'cb1'])
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})
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it('queueJob & postFlushCb inside queueJob', async () => {
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const calls: string[] = []
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const job1 = () => {
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calls.push('job1')
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// cb1 will executed after job2
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// Job has higher priority than postFlushCb
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queuePostFlushCb(cb1)
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queueJob(job2)
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}
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const job2 = () => {
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calls.push('job2')
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}
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const cb1 = () => {
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calls.push('cb1')
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}
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queueJob(job1)
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await nextTick()
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expect(calls).toEqual(['job1', 'job2', 'cb1'])
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})
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it('nested queueJob w/ postFlushCb', async () => {
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const calls: string[] = []
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const job1 = () => {
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calls.push('job1')
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queuePostFlushCb(cb1)
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queueJob(job2)
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}
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const job2 = () => {
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calls.push('job2')
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queuePostFlushCb(cb2)
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}
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const cb1 = () => {
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calls.push('cb1')
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}
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const cb2 = () => {
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calls.push('cb2')
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}
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queueJob(job1)
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await nextTick()
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expect(calls).toEqual(['job1', 'job2', 'cb1', 'cb2'])
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})
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})
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test('invalidateJob', async () => {
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const calls: string[] = []
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const job1 = () => {
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calls.push('job1')
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invalidateJob(job2)
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job2()
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}
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const job2 = () => {
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calls.push('job2')
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}
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const job3 = () => {
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calls.push('job3')
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}
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const job4 = () => {
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calls.push('job4')
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}
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// queue all jobs
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queueJob(job1)
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queueJob(job2)
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queueJob(job3)
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queuePostFlushCb(job4)
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expect(calls).toEqual([])
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await nextTick()
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// job2 should be called only once
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expect(calls).toEqual(['job1', 'job2', 'job3', 'job4'])
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})
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test('sort job based on id', async () => {
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const calls: string[] = []
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const job1 = () => calls.push('job1')
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// job1 has no id
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const job2 = () => calls.push('job2')
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job2.id = 2
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const job3 = () => calls.push('job3')
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job3.id = 1
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queueJob(job1)
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queueJob(job2)
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queueJob(job3)
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await nextTick()
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expect(calls).toEqual(['job3', 'job2', 'job1'])
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})
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test('sort SchedulerCbs based on id', async () => {
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const calls: string[] = []
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const cb1 = () => calls.push('cb1')
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// cb1 has no id
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const cb2 = () => calls.push('cb2')
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cb2.id = 2
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const cb3 = () => calls.push('cb3')
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cb3.id = 1
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queuePostFlushCb(cb1)
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queuePostFlushCb(cb2)
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queuePostFlushCb(cb3)
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await nextTick()
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expect(calls).toEqual(['cb3', 'cb2', 'cb1'])
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})
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// #1595
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test('avoid duplicate postFlushCb invocation', async () => {
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const calls: string[] = []
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const cb1 = () => {
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calls.push('cb1')
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queuePostFlushCb(cb2)
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}
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const cb2 = () => {
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calls.push('cb2')
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}
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queuePostFlushCb(cb1)
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queuePostFlushCb(cb2)
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await nextTick()
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expect(calls).toEqual(['cb1', 'cb2'])
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})
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test('nextTick should capture scheduler flush errors', async () => {
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const err = new Error('test')
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queueJob(() => {
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throw err
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})
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try {
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await nextTick()
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} catch (e) {
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expect(e).toBe(err)
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}
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expect(
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`Unhandled error during execution of scheduler flush`
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).toHaveBeenWarned()
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// this one should no longer error
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await nextTick()
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})
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test('should prevent self-triggering jobs by default', async () => {
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let count = 0
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const job = () => {
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if (count < 3) {
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count++
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queueJob(job)
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}
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}
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queueJob(job)
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await nextTick()
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// only runs once - a job cannot queue itself
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expect(count).toBe(1)
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})
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test('should allow explicitly marked jobs to trigger itself', async () => {
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// normal job
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let count = 0
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const job = () => {
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if (count < 3) {
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count++
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queueJob(job)
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}
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}
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job.allowRecurse = true
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queueJob(job)
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await nextTick()
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expect(count).toBe(3)
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// post cb
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const cb = () => {
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if (count < 5) {
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count++
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queuePostFlushCb(cb)
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}
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}
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cb.allowRecurse = true
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queuePostFlushCb(cb)
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await nextTick()
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expect(count).toBe(5)
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})
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test('should prevent duplicate queue', async () => {
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let count = 0
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const job = () => {
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count++
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}
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job.cb = true
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queueJob(job)
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queueJob(job)
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await nextTick()
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expect(count).toBe(1)
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})
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// #1947 flushPostFlushCbs should handle nested calls
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// e.g. app.mount inside app.mount
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test('flushPostFlushCbs', async () => {
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let count = 0
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const queueAndFlush = (hook: Function) => {
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queuePostFlushCb(hook)
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flushPostFlushCbs()
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}
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queueAndFlush(() => {
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queueAndFlush(() => {
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count++
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})
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})
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await nextTick()
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expect(count).toBe(1)
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})
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})
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