lib/cmd/cmd_test.go

   1 // Copyright (C) The Arvados Authors. All rights reserved.
   2 //
   3 // SPDX-License-Identifier: Apache-2.0
   4
   5 package cmd
   6
   7 import (
   8         "bytes"
   9         "flag"
  10         "fmt"
  11         "io"
  12         "strings"
  13         "testing"
  14
  15         "git.arvados.org/arvados.git/lib/cmdtest"
  16         check "gopkg.in/check.v1"
  17 )
  18
  19 // Gocheck boilerplate
  20 func Test(t *testing.T) {
  21         check.TestingT(t)
  22 }
  23
  24 var _ = check.Suite(&CmdSuite{})
  25
  26 type CmdSuite struct{}
  27
  28 var testCmd = Multi(map[string]Handler{
  29         "echo": HandlerFunc(func(prog string, args []string, stdin io.Reader, stdout io.Writer, stderr io.Writer) int {
  30                 fmt.Fprintln(stdout, strings.Join(args, " "))
  31                 return 0
  32         }),
  33 })
  34
  35 func (s *CmdSuite) TestHello(c *check.C) {
  36         defer cmdtest.LeakCheck(c)()
  37         stdout := bytes.NewBuffer(nil)
  38         stderr := bytes.NewBuffer(nil)
  39         exited := testCmd.RunCommand("prog", []string{"echo", "hello", "world"}, bytes.NewReader(nil), stdout, stderr)
  40         c.Check(exited, check.Equals, 0)
  41         c.Check(stdout.String(), check.Equals, "hello world\n")
  42         c.Check(stderr.String(), check.Equals, "")
  43 }
  44
  45 func (s *CmdSuite) TestHelloViaProg(c *check.C) {
  46         defer cmdtest.LeakCheck(c)()
  47         stdout := bytes.NewBuffer(nil)
  48         stderr := bytes.NewBuffer(nil)
  49         exited := testCmd.RunCommand("/usr/local/bin/echo", []string{"hello", "world"}, bytes.NewReader(nil), stdout, stderr)
  50         c.Check(exited, check.Equals, 0)
  51         c.Check(stdout.String(), check.Equals, "hello world\n")
  52         c.Check(stderr.String(), check.Equals, "")
  53 }
  54
  55 func (s *CmdSuite) TestUsage(c *check.C) {
  56         defer cmdtest.LeakCheck(c)()
  57         stdout := bytes.NewBuffer(nil)
  58         stderr := bytes.NewBuffer(nil)
  59         exited := testCmd.RunCommand("prog", []string{"nosuchcommand", "hi"}, bytes.NewReader(nil), stdout, stderr)
  60         c.Check(exited, check.Equals, 2)
  61         c.Check(stdout.String(), check.Equals, "")
  62         c.Check(stderr.String(), check.Matches, `(?ms)^prog: unrecognized command "nosuchcommand"\n.*echo.*\n`)
  63 }
  64
  65 func (s *CmdSuite) TestSubcommandToFront(c *check.C) {
  66         defer cmdtest.LeakCheck(c)()
  67         flags := flag.NewFlagSet("", flag.ContinueOnError)
  68         flags.String("format", "json", "")
  69         flags.Bool("n", false, "")
  70         args := SubcommandToFront([]string{"--format=yaml", "-n", "-format", "beep", "echo", "hi"}, flags)
  71         c.Check(args, check.DeepEquals, []string{"echo", "--format=yaml", "-n", "-format", "beep", "hi"})
  72 }