Add argument assertion to inspect/status/url commands

Signed-off-by: Kazuyuki Suzuki <kechol28@gmail.com>

commands/inspect.go

@@ -23,6 +23,11 @@ var funcMap = template.FuncMap{
 }
 
 func cmdInspect(c *cli.Context) {
+	if len(c.Args()) == 0 {
+		cli.ShowCommandHelp(c, "inspect")
+		log.Fatal("You must specify a machine name")
+	}
+
 	tmplString := c.String("format")
 	if tmplString != "" {
 		var tmpl *template.Template

commands/status.go

@@ -1,12 +1,14 @@
 package commands
 
 import (
-	"github.com/docker/machine/libmachine/log"
-
 	"github.com/codegangsta/cli"
+	"github.com/docker/machine/libmachine/log"
 )
 
 func cmdStatus(c *cli.Context) {
+	if len(c.Args()) != 1 {
+		log.Fatal(ErrExpectedOneMachine)
+	}
 	host := getFirstArgHost(c)
 	currentState, err := host.Driver.GetState()
 	if err != nil {

commands/url.go

@@ -3,12 +3,14 @@ package commands
 import (
 	"fmt"
 
-	"github.com/docker/machine/libmachine/log"
-
 	"github.com/codegangsta/cli"
+	"github.com/docker/machine/libmachine/log"
 )
 
 func cmdUrl(c *cli.Context) {
+	if len(c.Args()) != 1 {
+		log.Fatal(ErrExpectedOneMachine)
+	}
 	url, err := getFirstArgHost(c).GetURL()
 	if err != nil {
 		log.Fatal(err)

test/integration/cli/inspect.bats

@@ -0,0 +1,9 @@
+#!/usr/bin/env bats
+
+load ${BASE_TEST_DIR}/helpers.bash
+
+@test "inspect: show error in case of no args" {
+  run machine inspect
+  [ "$status" -eq 1 ]
+  [[ ${output} == *"must specify a machine name"* ]]
+}

test/integration/cli/status.bats

@@ -0,0 +1,9 @@
+#!/usr/bin/env bats
+
+load ${BASE_TEST_DIR}/helpers.bash
+
+@test "status: show error in case of no args" {
+  run machine inspect
+  [ "$status" -eq 1 ]
+  [[ ${output} == *"must specify a machine name"* ]]
+}

test/integration/cli/url.bats

@@ -0,0 +1,9 @@
+#!/usr/bin/env bats
+
+load ${BASE_TEST_DIR}/helpers.bash
+
+@test "url: show error in case of no args" {
+  run machine inspect
+  [ "$status" -eq 1 ]
+  [[ ${output} == *"must specify a machine name"* ]]
+}