Add e2e container kill test

Signed-off-by: Vincent Demeester <vincent@sbr.pm>

e2e/container/kill_test.go

@@ -0,0 +1,53 @@
+package container
+
+import (
+	"strings"
+	"testing"
+	"time"
+
+	"github.com/docker/cli/e2e/internal/fixtures"
+	"github.com/gotestyourself/gotestyourself/icmd"
+	"github.com/gotestyourself/gotestyourself/poll"
+)
+
+func TestKillContainer(t *testing.T) {
+	containerID := runBackgroundTop(t)
+
+	// Kill with SIGTERM should kill the process
+	result := icmd.RunCmd(
+		icmd.Command("docker", "kill", "-s", "SIGTERM", containerID),
+	)
+
+	result.Assert(t, icmd.Success)
+	poll.WaitOn(t, containerStatus(t, containerID, "exited"), poll.WithDelay(100*time.Millisecond), poll.WithTimeout(5*time.Second))
+
+	// Kill on a stop container should return an error
+	result = icmd.RunCmd(
+		icmd.Command("docker", "kill", containerID),
+	)
+	result.Assert(t, icmd.Expected{
+		ExitCode: 1,
+		Err:      "is not running",
+	})
+}
+
+func runBackgroundTop(t *testing.T) string {
+	result := icmd.RunCmd(shell(t,
+		"docker run -d %s top", fixtures.AlpineImage))
+	result.Assert(t, icmd.Success)
+	return strings.TrimSpace(result.Stdout())
+}
+
+func containerStatus(t *testing.T, containerID, status string) func(poll.LogT) poll.Result {
+	return func(poll.LogT) poll.Result {
+		result := icmd.RunCmd(
+			shell(t, "docker inspect -f '{{ .State.Status }}' %s", containerID),
+		)
+		result.Assert(t, icmd.Success)
+		actual := strings.TrimSpace(result.Stdout())
+		if actual == status {
+			return poll.Success()
+		}
+		return poll.Continue("expected status %s != %s", status, actual)
+	}
+}