Add test for exec'ing new process in existing container

Signed-off-by: Kenfe-Mickael Laventure <mickael.laventure@gmail.com>

integration-test/exec_test.go

@@ -0,0 +1,56 @@
+package main
+
+import (
+	"github.com/docker/containerd/api/grpc/types"
+	"github.com/docker/docker/pkg/integration/checker"
+	"github.com/go-check/check"
+)
+
+func (cs *ContainerdSuite) TestBusyboxTopExecEcho(t *check.C) {
+	bundleName := "busybox-top"
+	if err := CreateBusyboxBundle(bundleName, []string{"top"}); err != nil {
+		t.Fatal(err)
+	}
+
+	var (
+		err   error
+		initp *containerProcess
+		echop *containerProcess
+	)
+
+	containerId := "top"
+	initp, err = cs.StartContainer(containerId, bundleName)
+	t.Assert(err, checker.Equals, nil)
+
+	echop, err = cs.AddProcessToContainer(initp, "echo", "/", []string{"PATH=/bin"}, []string{"sh", "-c", "echo -n Ay Caramba! ; exit 1"}, 0, 0)
+	t.Assert(err, checker.Equals, nil)
+
+	for _, evt := range []types.Event{
+		{
+			Type:   "start-container",
+			Id:     containerId,
+			Status: 0,
+			Pid:    "",
+		},
+		{
+			Type:   "start-process",
+			Id:     containerId,
+			Status: 0,
+			Pid:    "echo",
+		},
+		{
+			Type:   "exit",
+			Id:     containerId,
+			Status: 1,
+			Pid:    "echo",
+		},
+	} {
+		ch := initp.GetEventsChannel()
+		e := <-ch
+		evt.Timestamp = e.Timestamp
+
+		t.Assert(*e, checker.Equals, evt)
+	}
+
+	t.Assert(echop.io.stdoutBuffer.String(), checker.Equals, "Ay Caramba!")
+}