github.com/hugh712/snapd@v0.0.0-20200910133618-1a99902bd583/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  
    25  var (
    26  	// one two "three four" "five \"six\"" seven#eight # nine # ten
    27  	// eleven 'twelve\'
    28  	testString = "\\one two \"three four\" \"five \\\"six\\\"\" seven#eight # nine # ten\n eleven 'twelve\\' thirteen=13 fourteen/14"
    29  )
    30  
    31  func TestClassifier(t *testing.T) {
    32  	classifier := newDefaultClassifier()
    33  	tests := map[rune]runeTokenClass{
    34  		' ':  spaceRuneClass,
    35  		'"':  escapingQuoteRuneClass,
    36  		'\'': nonEscapingQuoteRuneClass,
    37  		'#':  commentRuneClass}
    38  	for runeChar, want := range tests {
    39  		got := classifier.ClassifyRune(runeChar)
    40  		if got != want {
    41  			t.Errorf("ClassifyRune(%v) -> %v. Want: %v", runeChar, got, want)
    42  		}
    43  	}
    44  }
    45  
    46  func TestTokenizer(t *testing.T) {
    47  	testInput := strings.NewReader(testString)
    48  	expectedTokens := []*Token{
    49  		{WordToken, "one"},
    50  		{WordToken, "two"},
    51  		{WordToken, "three four"},
    52  		{WordToken, "five \"six\""},
    53  		{WordToken, "seven#eight"},
    54  		{CommentToken, " nine # ten"},
    55  		{WordToken, "eleven"},
    56  		{WordToken, "twelve\\"},
    57  		{WordToken, "thirteen=13"},
    58  		{WordToken, "fourteen/14"}}
    59  
    60  	tokenizer := NewTokenizer(testInput)
    61  	for i, want := range expectedTokens {
    62  		got, err := tokenizer.Next()
    63  		if err != nil {
    64  			t.Error(err)
    65  		}
    66  		if !got.Equal(want) {
    67  			t.Errorf("Tokenizer.Next()[%v] of %q -> %v. Want: %v", i, testString, got, want)
    68  		}
    69  	}
    70  }
    71  
    72  func TestLexer(t *testing.T) {
    73  	testInput := strings.NewReader(testString)
    74  	expectedStrings := []string{"one", "two", "three four", "five \"six\"", "seven#eight", "eleven", "twelve\\", "thirteen=13", "fourteen/14"}
    75  
    76  	lexer := NewLexer(testInput)
    77  	for i, want := range expectedStrings {
    78  		got, err := lexer.Next()
    79  		if err != nil {
    80  			t.Error(err)
    81  		}
    82  		if got != want {
    83  			t.Errorf("Lexer.Next()[%v] of %q -> %v. Want: %v", i, testString, got, want)
    84  		}
    85  	}
    86  }
    87  
    88  func TestSplit(t *testing.T) {
    89  	want := []string{"one", "two", "three four", "five \"six\"", "seven#eight", "eleven", "twelve\\", "thirteen=13", "fourteen/14"}
    90  	got, err := Split(testString)
    91  	if err != nil {
    92  		t.Error(err)
    93  	}
    94  	if len(want) != len(got) {
    95  		t.Errorf("Split(%q) -> %v. Want: %v", testString, got, want)
    96  	}
    97  	for i := range got {
    98  		if got[i] != want[i] {
    99  			t.Errorf("Split(%q)[%v] -> %v. Want: %v", testString, i, got[i], want[i])
   100  		}
   101  	}
   102  }
   103  
   104  func TestEOFAfterEscape(t *testing.T) {
   105  	_, err := Split(testString + "\\")
   106  	if err == nil {
   107  		t.Error(err)
   108  	}
   109  }
   110  
   111  func TestEOFInQuotingEscape(t *testing.T) {
   112  	_, err := Split(`foo"`)
   113  	if err == nil {
   114  		t.Error(err)
   115  	}
   116  
   117  	_, err = Split(`foo'`)
   118  	if err == nil {
   119  		t.Error(err)
   120  	}
   121  
   122  	_, err = Split(`"foo\`)
   123  	if err == nil {
   124  		t.Error(err)
   125  	}
   126  }
   127  
   128  func TestEOFInComment(t *testing.T) {
   129  	got, err := Split("#")
   130  	if err != nil {
   131  		t.Error(err)
   132  	}
   133  	if len(got) > 1 {
   134  		t.Errorf("Split(%q) -> %v", testString, got)
   135  	}
   136  }
   137  
   138  type nastyReader struct{}
   139  
   140  var nastyReaderErr = errors.New("foo")
   141  
   142  func (*nastyReader) Read(_ []byte) (int, error) {
   143  	return 0, nastyReaderErr
   144  }
   145  
   146  func TestNastyReader(t *testing.T) {
   147  	l := NewLexer(&nastyReader{})
   148  	_, err := l.Next()
   149  	if err == nil {
   150  		t.Errorf("expected an error, got nil instead")
   151  	}
   152  	if err != nastyReaderErr {
   153  		t.Errorf("unexpected error")
   154  	}
   155  }