test(container): fix broken restart test

This test started failing for mysterious reasons; it can be improved by
testing our more recent hand-rolled restart logic instead of the
previous Docker integration.

internal/container/integration_test.go

@@ -4,7 +4,7 @@ package container_test
 
 import (
 	"context"
-	"errors"
+	"fmt"
 	"testing"
 	"time"
 
@@ -167,7 +167,9 @@ func TestIntegrationClientRemoveContainers(t *testing.T) {
 	assert.NoError(t, <-err3C)
 }
 
-func TestContainerRestart(t *testing.T) {
+func TestIntegrationContainerRestart(t *testing.T) {
+	const wantRestartCount = 3
+
 	ctx, cancel := context.WithCancel(context.Background())
 	t.Cleanup(cancel)
 
@@ -185,41 +187,45 @@ func TestContainerRestart(t *testing.T) {
 		Name:     containerName,
 		ChanSize: 1,
 		ContainerConfig: &typescontainer.Config{
-			Image:  "alpine:latest",
-			Cmd:    []string{"sleep", "1"},
-			Labels: map[string]string{container.LabelComponent: component},
+			Image:      "alpine:3.18",
+			Entrypoint: []string{"sleep", "1"},
+			Cmd:        []string{"1"}, // 1 second
+			Labels:     map[string]string{container.LabelComponent: component},
 		},
 		HostConfig: &typescontainer.HostConfig{
-			NetworkMode:   "default",
-			RestartPolicy: typescontainer.RestartPolicy{Name: "always"},
+			NetworkMode: "default",
 		},
+		ShouldRestart: func(_ int64, restartCount int, _ [][]byte, _ time.Duration) (bool, error) {
+			return restartCount < wantRestartCount, nil
+		},
+		RestartInterval: 1 * time.Second,
 	})
 	testhelpers.ChanRequireNoError(t, errC)
 
-	containerState := <-containerStateC
-	assert.Equal(t, "pulling", containerState.Status)
-	containerState = <-containerStateC
-	assert.Equal(t, "created", containerState.Status)
-	containerState = <-containerStateC
-	assert.Equal(t, "running", containerState.Status)
+outer:
+	for {
+		select {
+		case containerState := <-containerStateC:
+			if containerState.Status == "running" {
+				break outer
+			}
+		case <-time.After(5 * time.Second):
+			require.Fail(t, "timeout waiting for container")
+		}
+	}
 
 	err = nil // reset error
 	done := make(chan struct{})
 	go func() {
 		defer close(done)
 
-		var count int
 		for {
-			containerState = <-containerStateC
-			if containerState.Status == domain.ContainerStatusRestarting {
+			containerState := <-containerStateC
+			if containerState.Status == domain.ContainerStatusExited {
+				if containerState.RestartCount != wantRestartCount {
+					err = fmt.Errorf("expected %d restarts, got %d", wantRestartCount, containerState.RestartCount)
+				}
 				break
-			} else if containerState.Status == domain.ContainerStatusExited {
-				err = errors.New("container exited unexpectedly")
-			} else if count >= 5 {
-				err = errors.New("container did not enter restarting state")
-			} else {
-				// wait for a few state changes
-				count++
 			}
 		}
 	}()