validate service parameter in client side to avoid api call

Signed-off-by: allencloud <allen.sun@daocloud.io>
Upstream-commit: 5ba203e73a541935128e29a3babf810aac8ee004
Component: engine

components/engine/integration-cli/docker_cli_service_scale_test.go

@@ -0,0 +1,57 @@
+// +build !windows
+
+package main
+
+import (
+	"fmt"
+	"strings"
+
+	"github.com/docker/docker/pkg/integration/checker"
+	"github.com/go-check/check"
+)
+
+func (s *DockerSwarmSuite) TestServiceScale(c *check.C) {
+	d := s.AddDaemon(c, true, true)
+
+	service1Name := "TestService1"
+	service1Args := append([]string{"service", "create", "--name", service1Name, defaultSleepImage}, sleepCommandForDaemonPlatform()...)
+
+	// global mode
+	service2Name := "TestService2"
+	service2Args := append([]string{"service", "create", "--name", service2Name, "--mode=global", defaultSleepImage}, sleepCommandForDaemonPlatform()...)
+
+	// Create services
+	out, err := d.Cmd(service1Args...)
+	c.Assert(err, checker.IsNil)
+
+	out, err = d.Cmd(service2Args...)
+	c.Assert(err, checker.IsNil)
+
+	out, err = d.Cmd("service", "scale", "TestService1=2")
+	c.Assert(err, checker.IsNil)
+
+	out, err = d.Cmd("service", "scale", "TestService1=foobar")
+	c.Assert(err, checker.NotNil)
+
+	str := fmt.Sprintf("%s: invalid replicas value %s", service1Name, "foobar")
+	if !strings.Contains(out, str) {
+		c.Errorf("got: %s, expected has sub string: %s", out, str)
+	}
+
+	out, err = d.Cmd("service", "scale", "TestService1=-1")
+	c.Assert(err, checker.NotNil)
+
+	str = fmt.Sprintf("%s: invalid replicas value %s", service1Name, "-1")
+	if !strings.Contains(out, str) {
+		c.Errorf("got: %s, expected has sub string: %s", out, str)
+	}
+
+	// TestService2 is a global mode
+	out, err = d.Cmd("service", "scale", "TestService2=2")
+	c.Assert(err, checker.NotNil)
+
+	str = fmt.Sprintf("%s: scale can only be used with replicated mode\n", service2Name)
+	if out != str {
+		c.Errorf("got: %s, expected: %s", out, str)
+	}
+}