add test coverage

wait_any_test.go

@@ -24,10 +24,10 @@ func TestWaitAny(t *testing.T) {
 	// should finish after right away
 	assert.True(t, elapsed < 2*time.Millisecond, fmt.Sprintf("actually elapsed: %v", elapsed))
 
+	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))
-	start = time.Now()
 	err = asynctask.WaitAny(ctx, &asynctask.WaitAnyOptions{FailFast: true}, countingTsk1, countingTsk2, countingTsk3)
 	elapsed = time.Since(start)
 	assert.NoError(t, err)
@@ -42,6 +42,31 @@ func TestWaitAny(t *testing.T) {
 	time.Sleep(1 * time.Millisecond)
 }
 
+func TestWaitAnyContextCancel(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))
+	go func() {
+		time.Sleep(5 * time.Millisecond)
+		cancelTaskExecution()
+	}()
+	err := asynctask.WaitAny(ctx, nil, countingTsk1, countingTsk2)
+	elapsed := time.Since(start)
+	assert.Error(t, err)
+	assert.Equal(t, "WaitAny context canceled", err.Error(), "expecting context canceled error")
+	// should finish right after countingTsk3
+	assert.True(t, elapsed >= 5*time.Millisecond && elapsed < 200*time.Millisecond, fmt.Sprintf("actually elapsed: %v", elapsed))
+
+	// 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 TestWaitAnyErrorCase(t *testing.T) {
 	t.Parallel()
 	ctx, cancelTaskExecution := newTestContextWithTimeout(t, 3*time.Second)
@@ -58,6 +83,7 @@ func TestWaitAnyErrorCase(t *testing.T) {
 	completedTskState := completedTsk.State()
 	assert.Equal(t, asynctask.StateCompleted, completedTskState, "completed task should finished")
 
+	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))
@@ -84,6 +110,34 @@ func TestWaitAnyErrorCase(t *testing.T) {
 	time.Sleep(1 * time.Millisecond)
 }
 
+func TestWaitAnyAllFailCase(t *testing.T) {
+	t.Parallel()
+	ctx, cancelTaskExecution := newTestContextWithTimeout(t, 3*time.Second)
+
+	start := time.Now()
+	errorTsk := asynctask.Start(ctx, getErrorTask("expected error", 10*time.Millisecond))
+	panicTsk := asynctask.Start(ctx, getPanicTask(20*time.Millisecond))
+	err := asynctask.WaitAny(ctx, nil, errorTsk, panicTsk)
+	assert.Error(t, err)
+
+	panicTskState := panicTsk.State()
+	errTskState := errorTsk.State()
+	elapsed := time.Since(start)
+	cancelTaskExecution() // all assertion variable captured, cancel counting task
+
+	assert.Equal(t, "expected error", err.Error(), "expecting first error")
+	// should finsh after both error
+	assert.True(t, elapsed >= 20*time.Millisecond, fmt.Sprintf("actually elapsed: %v", elapsed))
+
+	assert.Equal(t, asynctask.StateFailed, errTskState, "error task should failed")
+	assert.Equal(t, asynctask.StateFailed, panicTskState, "panic task should Not failed")
+
+	// 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 TestWaitAnyErrorWithFailFastCase(t *testing.T) {
 	t.Parallel()
 	ctx, cancelTaskExecution := newTestContextWithTimeout(t, 3*time.Second)
@@ -98,6 +152,7 @@ func TestWaitAnyErrorWithFailFastCase(t *testing.T) {
 	// should finish after right away
 	assert.True(t, elapsed < 20*time.Millisecond, fmt.Sprintf("actually elapsed: %v", elapsed))
 
+	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))