gopkg.in/hugelgupf/u-root.v2@v2.0.0-20180831055005-3f8fdb0ce09d/cmds/id/id_test.go (about)

     1  // Copyright 2017-2018 the u-root Authors. All rights reserved
     2  // Use of this source code is governed by a BSD-style
     3  // license that can be found in the LICENSE file.
     4  
     5  package main
     6  
     7  import (
     8  	"bytes"
     9  	"os/exec"
    10  	"testing"
    11  
    12  	"github.com/u-root/u-root/pkg/testutil"
    13  )
    14  
    15  var (
    16  	logPrefixLength = len("2009/11/10 23:00:00 ")
    17  )
    18  
    19  type test struct {
    20  	opt []string
    21  	out string
    22  }
    23  
    24  // Run the command, with the optional args, and return a string
    25  // for stdout, stderr, and an error.
    26  func run(c *exec.Cmd) (string, string, error) {
    27  	var o, e bytes.Buffer
    28  	c.Stdout, c.Stderr = &o, &e
    29  	err := c.Run()
    30  	return o.String(), e.String(), err
    31  }
    32  
    33  // Test incorrect invocation of id
    34  func TestInvocation(t *testing.T) {
    35  	var tests = []test{
    36  		{opt: []string{"-n"}, out: "id: cannot print only names in default format\n"},
    37  		{opt: []string{"-G", "-g"}, out: "id: cannot print \"only\" of more than one choice\n"},
    38  		{opt: []string{"-G", "-u"}, out: "id: cannot print \"only\" of more than one choice\n"},
    39  		{opt: []string{"-g", "-u"}, out: "id: cannot print \"only\" of more than one choice\n"},
    40  		{opt: []string{"-g", "-u", "-G"}, out: "id: cannot print \"only\" of more than one choice\n"},
    41  	}
    42  
    43  	for _, test := range tests {
    44  		c := testutil.Command(t, test.opt...)
    45  		_, e, _ := run(c)
    46  
    47  		// Ignore the date and time because we're using Log.Fatalf
    48  		if e[logPrefixLength:] != test.out {
    49  			t.Errorf("id for '%v' failed: got '%s', want '%s'", test.opt, e, test.out)
    50  		}
    51  	}
    52  }
    53  
    54  func TestMain(m *testing.M) {
    55  	testutil.Run(m, main)
    56  }