integration-cli/docker_cli_service_scale_test.go
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 // +build !windows
 
 package main
 
 import (
 	"fmt"
 	"strings"
 
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 	"github.com/docker/docker/integration-cli/checker"
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 	"github.com/go-check/check"
 )
 
 func (s *DockerSwarmSuite) TestServiceScale(c *check.C) {
 	d := s.AddDaemon(c, true, true)
 
 	service1Name := "TestService1"
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 	service1Args := append([]string{"service", "create", "--detach", "--no-resolve-image", "--name", service1Name, defaultSleepImage}, sleepCommandForDaemonPlatform()...)
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 	// global mode
 	service2Name := "TestService2"
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 	service2Args := append([]string{"service", "create", "--detach", "--no-resolve-image", "--name", service2Name, "--mode=global", defaultSleepImage}, sleepCommandForDaemonPlatform()...)
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 	// Create services
 	out, err := d.Cmd(service1Args...)
 	c.Assert(err, checker.IsNil)
 
 	out, err = d.Cmd(service2Args...)
 	c.Assert(err, checker.IsNil)
 
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 	out, err = d.Cmd("service", "scale", "TestService1=2")
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 	c.Assert(err, checker.IsNil)
 
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 	out, err = d.Cmd("service", "scale", "TestService1=foobar")
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 	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)
 	}
 
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 	out, err = d.Cmd("service", "scale", "TestService1=-1")
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 	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
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 	out, err = d.Cmd("service", "scale", "TestService2=2")
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 	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)
 	}
 }