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wait_all_test.go
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wait_all_test.go
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package asynctask_test
import (
"context"
"errors"
"fmt"
"testing"
"time"
"github.com/Azure/go-asynctask"
"github.com/stretchr/testify/assert"
)
func TestWaitAll(t *testing.T) {
t.Parallel()
ctx, cancelTaskExecution := newTestContextWithTimeout(t, 2*time.Second)
start := time.Now()
countingTsk1 := asynctask.Start(ctx, getCountingTask(10, "countingPer40ms", 40*time.Millisecond))
countingTsk2 := asynctask.Start(ctx, getCountingTask(10, "countingPer20ms", 20*time.Millisecond))
countingTsk3 := asynctask.Start(ctx, getCountingTask(10, "countingPer2ms", 2*time.Millisecond))
result := "something"
completedTsk := asynctask.NewCompletedTask(&result)
err := asynctask.WaitAll(ctx, &asynctask.WaitAllOptions{FailFast: true}, countingTsk1, countingTsk2, countingTsk3, completedTsk)
elapsed := time.Since(start)
assert.NoError(t, err)
cancelTaskExecution()
// should only finish after longest task.
assert.True(t, elapsed > 10*40*time.Millisecond, fmt.Sprintf("actually elapsed: %v", elapsed))
}
func TestWaitAllFailFastCase(t *testing.T) {
t.Parallel()
ctx, cancelTaskExecution := newTestContextWithTimeout(t, 3*time.Second)
start := time.Now()
countingTsk := asynctask.Start(ctx, getCountingTask(10, "countingPer40ms", 40*time.Millisecond))
errorTsk := asynctask.Start(ctx, getErrorTask("expected error", 10*time.Millisecond))
panicTsk := asynctask.Start(ctx, getPanicTask(20*time.Millisecond))
result := "something"
completedTsk := asynctask.NewCompletedTask(&result)
err := asynctask.WaitAll(ctx, &asynctask.WaitAllOptions{FailFast: true}, countingTsk, errorTsk, panicTsk, completedTsk)
countingTskState := countingTsk.State()
panicTskState := countingTsk.State()
errTskState := errorTsk.State()
elapsed := time.Since(start)
cancelTaskExecution() // all assertion variable captured, cancel counting task
assert.Error(t, err)
assert.Equal(t, "expected error", err.Error())
// should fail before we finish panic task
assert.True(t, elapsed.Milliseconds() < 20)
// since we pass FailFast, countingTsk and panicTsk should be still running
assert.Equal(t, asynctask.StateRunning, countingTskState)
assert.Equal(t, asynctask.StateRunning, panicTskState)
assert.Equal(t, asynctask.StateFailed, errTskState, "error task should the one failed the waitAll.")
// counting task do testing.Logf in another go routine
// while testing.Logf would cause DataRace error when test is already finished: https://github.com/golang/go/issues/40343
// wait minor time for the go routine to finish.
time.Sleep(1 * time.Millisecond)
}
func TestWaitAllErrorCase(t *testing.T) {
t.Parallel()
ctx, cancelTaskExecution := newTestContextWithTimeout(t, 3*time.Second)
start := time.Now()
countingTsk := asynctask.Start(ctx, getCountingTask(10, "countingPer40ms", 40*time.Millisecond))
errorTsk := asynctask.Start(ctx, getErrorTask("expected error", 10*time.Millisecond))
panicTsk := asynctask.Start(ctx, getPanicTask(20*time.Millisecond))
result := "something"
completedTsk := asynctask.NewCompletedTask(&result)
err := asynctask.WaitAll(ctx, nil, countingTsk, errorTsk, panicTsk, completedTsk)
countingTskState := countingTsk.State()
panicTskState := panicTsk.State()
errTskState := errorTsk.State()
completedTskState := completedTsk.State()
elapsed := time.Since(start)
cancelTaskExecution() // all assertion variable captured, cancel counting task
assert.Error(t, err)
assert.Equal(t, "expected error", err.Error(), "expecting first error")
// should only finish after longest task.
assert.True(t, elapsed > 10*40*time.Millisecond, fmt.Sprintf("actually elapsed: %v", elapsed))
assert.Equal(t, asynctask.StateCompleted, countingTskState, "countingTask should finished")
assert.Equal(t, asynctask.StateFailed, errTskState, "error task should failed")
assert.Equal(t, asynctask.StateFailed, panicTskState, "panic task should failed")
assert.Equal(t, asynctask.StateCompleted, completedTskState, "completed task should finished")
// counting task do testing.Logf in another go routine
// while testing.Logf would cause DataRace error when test is already finished: https://github.com/golang/go/issues/40343
// wait minor time for the go routine to finish.
time.Sleep(1 * time.Millisecond)
}
func TestWaitAllFailFastCancelingWait(t *testing.T) {
t.Parallel()
ctx, cancelTaskExecution := newTestContextWithTimeout(t, 3*time.Second)
start := time.Now()
countingTsk1 := asynctask.Start(ctx, getCountingTask(10, "countingPer40ms", 40*time.Millisecond))
countingTsk2 := asynctask.Start(ctx, getCountingTask(10, "countingPer20ms", 20*time.Millisecond))
countingTsk3 := asynctask.Start(ctx, getCountingTask(10, "countingPer2ms", 2*time.Millisecond))
result := "something"
completedTsk := asynctask.NewCompletedTask(&result)
waitCtx, cancelWait := context.WithTimeout(ctx, 5*time.Millisecond)
defer cancelWait()
err := asynctask.WaitAll(waitCtx, &asynctask.WaitAllOptions{FailFast: true}, countingTsk1, countingTsk2, countingTsk3, completedTsk)
elapsed := time.Since(start)
countingTsk1State := countingTsk1.State()
countingTsk2State := countingTsk2.State()
countingTsk3State := countingTsk3.State()
completedTskState := completedTsk.State()
cancelTaskExecution() // all assertion variable captured, cancel task execution
assert.Error(t, err)
assert.True(t, errors.Is(err, context.DeadlineExceeded))
// should return before first task
assert.True(t, elapsed < 10*2*time.Millisecond)
assert.Equal(t, countingTsk1State, asynctask.StateRunning)
assert.Equal(t, countingTsk2State, asynctask.StateRunning)
assert.Equal(t, countingTsk3State, asynctask.StateRunning)
assert.Equal(t, completedTskState, asynctask.StateCompleted)
// counting task do testing.Logf in another go routine
// while testing.Logf would cause DataRace error when test is already finished: https://github.com/golang/go/issues/40343
// wait minor time for the go routine to finish.
time.Sleep(1 * time.Millisecond)
}
func TestWaitAllCancelingWait(t *testing.T) {
t.Parallel()
ctx, cancelTaskExecution := newTestContextWithTimeout(t, 4*time.Millisecond)
start := time.Now()
rcCtx, rcCancel := context.WithCancel(context.Background())
uncontrollableTask := asynctask.Start(ctx, getUncontrollableTask(rcCtx, t))
countingTsk1 := asynctask.Start(ctx, getCountingTask(10, "countingPer40ms", 40*time.Millisecond))
countingTsk2 := asynctask.Start(ctx, getCountingTask(10, "countingPer20ms", 20*time.Millisecond))
countingTsk3 := asynctask.Start(ctx, getCountingTask(10, "countingPer2ms", 2*time.Millisecond))
result := "something"
completedTsk := asynctask.NewCompletedTask(&result)
waitCtx, cancelWait := context.WithTimeout(ctx, 5*time.Millisecond)
defer cancelWait()
err := asynctask.WaitAll(waitCtx, nil, countingTsk1, countingTsk2, countingTsk3, completedTsk, uncontrollableTask)
elapsed := time.Since(start)
t.Logf("WaitAll finished, elapsed: %v", elapsed)
cancelTaskExecution() // all assertion variable captured, cancel counting task
assert.Error(t, err)
assert.True(t, errors.Is(err, context.DeadlineExceeded))
// should return before first task
assert.True(t, elapsed < 10*2*time.Millisecond)
// cancel the remote control context to stop the uncontrollable task, or goleak.VerifyNone will fail.
rcCancel()
// counting task do testing.Logf in another go routine
// while testing.Logf would cause DataRace error when test is already finished: https://github.com/golang/go/issues/40343
// wait minor time for the go routine to finish.
time.Sleep(50 * time.Millisecond)
}
func TestWaitAllWithNoTasks(t *testing.T) {
t.Parallel()
ctx, cancelFunc := newTestContextWithTimeout(t, 1*time.Millisecond)
defer cancelFunc()
err := asynctask.WaitAll(ctx, nil)
assert.NoError(t, err)
}
// getUncontrollableTask return a task that is not honor context, it only hornor the remoteControl context.
func getUncontrollableTask(rcCtx context.Context, t *testing.T) asynctask.AsyncFunc[int] {
return func(ctx context.Context) (int, error) {
for {
select {
case <-time.After(1 * time.Millisecond):
if err := ctx.Err(); err != nil {
t.Logf("[UncontrollableTask]: context %s, but not honoring it.", err)
}
case <-rcCtx.Done():
t.Logf("[UncontrollableTask]: cancelled by remote control")
return 0, rcCtx.Err()
}
}
}
}