github.com/u-root/u-root@v7.0.1-0.20200915234505-ad7babab0a8e+incompatible/cmds/core/strings/strings_test.go (about)

     1  // Copyright 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  	"fmt"
    10  	"io/ioutil"
    11  	"os"
    12  	"testing"
    13  
    14  	"github.com/u-root/u-root/pkg/testutil"
    15  )
    16  
    17  type test struct {
    18  	name  string
    19  	flags []string
    20  	in    string
    21  	out   string
    22  }
    23  
    24  var stringsTests = []test{
    25  	{
    26  		"empty",
    27  		[]string{}, "", "",
    28  	},
    29  	{
    30  		"sequences are too short",
    31  		[]string{}, "\n\na\nab\n\nabc\nabc\xff\n01\n", "",
    32  	},
    33  	{
    34  		"entire string is too short",
    35  		[]string{}, "abc", "",
    36  	},
    37  	{
    38  		"entire string just fits perfectly",
    39  		[]string{}, "abcd", "abcd\n",
    40  	},
    41  	{
    42  		"entire string is printable",
    43  		[]string{}, "abcdefghijklmnopqrstuvwxyz", "abcdefghijklmnopqrstuvwxyz\n",
    44  	},
    45  	{
    46  		"terminating newline",
    47  		[]string{}, "abcdefghijklmnopqrstuvwxyz\n", "abcdefghijklmnopqrstuvwxyz\n",
    48  	},
    49  	{
    50  		"mix of printable and non-printable sequences",
    51  		[]string{}, "\n\na123456\nab\n\nabc\nabcde\xff\n01\n", "a123456\nabcde\n",
    52  	},
    53  	{
    54  		"spaces are printable",
    55  		[]string{}, " abcdefghijklm nopqrstuvwxyz ", " abcdefghijklm nopqrstuvwxyz \n",
    56  	},
    57  	{
    58  		"shorter value of n",
    59  		[]string{"--n", "1"}, "\n\na\nab\n\nabc\nabc\xff\n01\n", "a\nab\nabc\nabc\n01\n",
    60  	},
    61  	{
    62  		"larger value of n",
    63  		[]string{"--n", "6"}, "\n\na123456\nab\n\nabc\nabcde\xff\n01\n", "a123456\n",
    64  	},
    65  }
    66  
    67  // strings < in > out
    68  func TestSortWithPipes(t *testing.T) {
    69  	tmpDir, err := ioutil.TempDir("", "strings")
    70  	if err != nil {
    71  		t.Fatal(err)
    72  	}
    73  	defer os.RemoveAll(tmpDir)
    74  
    75  	// Table-driven testing
    76  	for _, tt := range stringsTests {
    77  		t.Run(fmt.Sprintf("%v", tt.name), func(t *testing.T) {
    78  			cmd := testutil.Command(t, tt.flags...)
    79  			cmd.Stdin = bytes.NewReader([]byte(tt.in))
    80  			out, err := cmd.CombinedOutput()
    81  			if err != nil {
    82  				t.Errorf("strings(%#v): %v", tt.in, err)
    83  			}
    84  			if string(out) != tt.out {
    85  				t.Errorf("strings(%#v) = %#v; want %#v", tt.in,
    86  					string(out), tt.out)
    87  			}
    88  		})
    89  	}
    90  }
    91  
    92  func TestMain(m *testing.M) {
    93  	testutil.Run(m, main)
    94  }