github.com/bugraaydogar/snapd@v0.0.0-20210315170335-8c70bb858939/strutil/shlex/shlex_test.go (about)

     1  /*
     2  Copyright 2012 Google Inc. All Rights Reserved.
     3  
     4  Licensed under the Apache License, Version 2.0 (the "License");
     5  you may not use this file except in compliance with the License.
     6  You may obtain a copy of the License at
     7  
     8      http://www.apache.org/licenses/LICENSE-2.0
     9  
    10  Unless required by applicable law or agreed to in writing, software
    11  distributed under the License is distributed on an "AS IS" BASIS,
    12  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    13  See the License for the specific language governing permissions and
    14  limitations under the License.
    15  */
    16  
    17  package shlex
    18  
    19  import (
    20  	"errors"
    21  	"strings"
    22  	"testing"
    23  
    24  	. "gopkg.in/check.v1"
    25  )
    26  
    27  func Test(t *testing.T) { TestingT(t) }
    28  
    29  var (
    30  	// one two "three four" "five \"six\"" seven#eight # nine # ten
    31  	// eleven 'twelve\'
    32  	testString = "\\one two \"three four\" \"five \\\"six\\\"\" seven#eight # nine # ten\n eleven 'twelve\\' thirteen=13 fourteen/14"
    33  )
    34  
    35  func TestClassifier(t *testing.T) {
    36  	classifier := newDefaultClassifier()
    37  	tests := map[rune]runeTokenClass{
    38  		' ':  spaceRuneClass,
    39  		'"':  escapingQuoteRuneClass,
    40  		'\'': nonEscapingQuoteRuneClass,
    41  		'#':  commentRuneClass}
    42  	for runeChar, want := range tests {
    43  		got := classifier.ClassifyRune(runeChar)
    44  		if got != want {
    45  			t.Errorf("ClassifyRune(%v) -> %v. Want: %v", runeChar, got, want)
    46  		}
    47  	}
    48  }
    49  
    50  func TestTokenizer(t *testing.T) {
    51  	testInput := strings.NewReader(testString)
    52  	expectedTokens := []*Token{
    53  		{WordToken, "one"},
    54  		{WordToken, "two"},
    55  		{WordToken, "three four"},
    56  		{WordToken, "five \"six\""},
    57  		{WordToken, "seven#eight"},
    58  		{CommentToken, " nine # ten"},
    59  		{WordToken, "eleven"},
    60  		{WordToken, "twelve\\"},
    61  		{WordToken, "thirteen=13"},
    62  		{WordToken, "fourteen/14"}}
    63  
    64  	tokenizer := NewTokenizer(testInput)
    65  	for i, want := range expectedTokens {
    66  		got, err := tokenizer.Next()
    67  		if err != nil {
    68  			t.Error(err)
    69  		}
    70  		if !got.Equal(want) {
    71  			t.Errorf("Tokenizer.Next()[%v] of %q -> %v. Want: %v", i, testString, got, want)
    72  		}
    73  	}
    74  }
    75  
    76  func TestLexer(t *testing.T) {
    77  	testInput := strings.NewReader(testString)
    78  	expectedStrings := []string{"one", "two", "three four", "five \"six\"", "seven#eight", "eleven", "twelve\\", "thirteen=13", "fourteen/14"}
    79  
    80  	lexer := NewLexer(testInput)
    81  	for i, want := range expectedStrings {
    82  		got, err := lexer.Next()
    83  		if err != nil {
    84  			t.Error(err)
    85  		}
    86  		if got != want {
    87  			t.Errorf("Lexer.Next()[%v] of %q -> %v. Want: %v", i, testString, got, want)
    88  		}
    89  	}
    90  }
    91  
    92  func TestSplit(t *testing.T) {
    93  	want := []string{"one", "two", "three four", "five \"six\"", "seven#eight", "eleven", "twelve\\", "thirteen=13", "fourteen/14"}
    94  	got, err := Split(testString)
    95  	if err != nil {
    96  		t.Error(err)
    97  	}
    98  	if len(want) != len(got) {
    99  		t.Errorf("Split(%q) -> %v. Want: %v", testString, got, want)
   100  	}
   101  	for i := range got {
   102  		if got[i] != want[i] {
   103  			t.Errorf("Split(%q)[%v] -> %v. Want: %v", testString, i, got[i], want[i])
   104  		}
   105  	}
   106  }
   107  
   108  func TestEOFAfterEscape(t *testing.T) {
   109  	_, err := Split(testString + "\\")
   110  	if err == nil {
   111  		t.Error(err)
   112  	}
   113  }
   114  
   115  func TestEOFInQuotingEscape(t *testing.T) {
   116  	_, err := Split(`foo"`)
   117  	if err == nil {
   118  		t.Error(err)
   119  	}
   120  
   121  	_, err = Split(`foo'`)
   122  	if err == nil {
   123  		t.Error(err)
   124  	}
   125  
   126  	_, err = Split(`"foo\`)
   127  	if err == nil {
   128  		t.Error(err)
   129  	}
   130  }
   131  
   132  func TestEOFInComment(t *testing.T) {
   133  	got, err := Split("#")
   134  	if err != nil {
   135  		t.Error(err)
   136  	}
   137  	if len(got) > 1 {
   138  		t.Errorf("Split(%q) -> %v", testString, got)
   139  	}
   140  }
   141  
   142  type nastyReader struct{}
   143  
   144  var nastyReaderErr = errors.New("foo")
   145  
   146  func (*nastyReader) Read(_ []byte) (int, error) {
   147  	return 0, nastyReaderErr
   148  }
   149  
   150  func TestNastyReader(t *testing.T) {
   151  	l := NewLexer(&nastyReader{})
   152  	_, err := l.Next()
   153  	if err == nil {
   154  		t.Errorf("expected an error, got nil instead")
   155  	}
   156  	if err != nastyReaderErr {
   157  		t.Errorf("unexpected error")
   158  	}
   159  }