mirror of https://github.com/hashicorp/consul
122 lines
2.2 KiB
Go
122 lines
2.2 KiB
Go
// Copyright (c) HashiCorp, Inc.
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// SPDX-License-Identifier: BUSL-1.1
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package controller
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import (
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"context"
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"errors"
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"sync/atomic"
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"testing"
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"time"
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)
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func TestSupervise(t *testing.T) {
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t.Parallel()
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ctx, cancel := context.WithCancel(context.Background())
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t.Cleanup(cancel)
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runCh := make(chan struct{})
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stopCh := make(chan struct{})
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errCh := make(chan error)
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task := func(taskCtx context.Context) error {
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runCh <- struct{}{}
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select {
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case err := <-errCh:
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return err
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case <-taskCtx.Done():
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stopCh <- struct{}{}
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return taskCtx.Err()
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}
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}
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lease := newTestLease()
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go newSupervisor(task, lease).run(ctx)
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select {
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case <-runCh:
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t.Fatal("task should not be running before lease is held")
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case <-time.After(500 * time.Millisecond):
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}
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lease.acquired()
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select {
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case <-runCh:
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case <-time.After(500 * time.Millisecond):
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t.Fatal("task not running after lease is acquired")
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}
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select {
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case <-stopCh:
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t.Fatal("task should not have stopped before lease is lost")
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case <-time.After(500 * time.Millisecond):
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}
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lease.lost()
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select {
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case <-stopCh:
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case <-time.After(500 * time.Millisecond):
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t.Fatal("task still running after lease was lost")
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}
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select {
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case <-runCh:
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t.Fatal("task should not be run again before lease is re-acquired")
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case <-time.After(500 * time.Millisecond):
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}
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lease.acquired()
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select {
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case <-runCh:
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case <-time.After(500 * time.Millisecond):
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t.Fatal("task not running after lease is re-acquired")
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}
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errCh <- errors.New("KABOOM")
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select {
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case <-runCh:
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case <-time.After(2 * time.Second):
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t.Fatal("task was not restarted")
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}
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cancel()
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select {
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case <-stopCh:
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case <-time.After(500 * time.Millisecond):
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t.Fatal("task still running after parent context was canceled")
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}
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}
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func newTestLease() *testLease {
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return &testLease{ch: make(chan struct{}, 1)}
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}
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type testLease struct {
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held atomic.Bool
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ch chan struct{}
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}
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func (l *testLease) Held() bool { return l.held.Load() }
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func (l *testLease) Changed() <-chan struct{} { return l.ch }
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func (l *testLease) acquired() { l.setHeld(true) }
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func (l *testLease) lost() { l.setHeld(false) }
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func (l *testLease) setHeld(held bool) {
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l.held.Store(held)
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select {
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case l.ch <- struct{}{}:
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default:
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}
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}
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