return err when stack name does not exist

Signed-off-by: allencloud <allen.sun@daocloud.io>
Upstream-commit: 416613f2e54581c62d3efa1c4f0288b6e7d58365
Component: engine

components/engine/integration-cli/docker_cli_stack_test.go

@@ -0,0 +1,28 @@
+// +build experimental
+
+package main
+
+import (
+	"github.com/docker/docker/pkg/integration/checker"
+	"github.com/go-check/check"
+)
+
+func (s *DockerSwarmSuite) TestStackRemove(c *check.C) {
+	d := s.AddDaemon(c, true, true)
+
+	stackArgs := append([]string{"remove", "UNKNOWN_STACK"})
+
+	out, err := d.Cmd("stack", stackArgs...)
+	c.Assert(err, checker.IsNil)
+	c.Assert(out, check.Equals, "Nothing found in stack: UNKNOWN_STACK\n")
+}
+
+func (s *DockerSwarmSuite) TestStackTasks(c *check.C) {
+	d := s.AddDaemon(c, true, true)
+
+	stackArgs := append([]string{"tasks", "UNKNOWN_STACK"})
+
+	out, err := d.Cmd("stack", stackArgs...)
+	c.Assert(err, checker.IsNil)
+	c.Assert(out, check.Equals, "Nothing found in stack: UNKNOWN_STACK\n")
+}