github.com/olljanat/moby@v1.13.1/builder/dockerfile/shell_parser_test.go (about)

     1  package dockerfile
     2  
     3  import (
     4  	"bufio"
     5  	"os"
     6  	"runtime"
     7  	"strings"
     8  	"testing"
     9  )
    10  
    11  func TestShellParser4EnvVars(t *testing.T) {
    12  	fn := "envVarTest"
    13  	lineCount := 0
    14  
    15  	file, err := os.Open(fn)
    16  	if err != nil {
    17  		t.Fatalf("Can't open '%s': %s", err, fn)
    18  	}
    19  	defer file.Close()
    20  
    21  	scanner := bufio.NewScanner(file)
    22  	envs := []string{"PWD=/home", "SHELL=bash", "KOREAN=한국어"}
    23  	for scanner.Scan() {
    24  		line := scanner.Text()
    25  		lineCount++
    26  
    27  		// Trim comments and blank lines
    28  		i := strings.Index(line, "#")
    29  		if i >= 0 {
    30  			line = line[:i]
    31  		}
    32  		line = strings.TrimSpace(line)
    33  
    34  		if line == "" {
    35  			continue
    36  		}
    37  
    38  		words := strings.Split(line, "|")
    39  		if len(words) != 3 {
    40  			t.Fatalf("Error in '%s' - should be exactly one | in:%q", fn, line)
    41  		}
    42  
    43  		words[0] = strings.TrimSpace(words[0])
    44  		words[1] = strings.TrimSpace(words[1])
    45  		words[2] = strings.TrimSpace(words[2])
    46  
    47  		// Key W=Windows; A=All; U=Unix
    48  		if (words[0] != "W") && (words[0] != "A") && (words[0] != "U") {
    49  			t.Fatalf("Invalid tag %s at line %d of %s. Must be W, A or U", words[0], lineCount, fn)
    50  		}
    51  
    52  		if ((words[0] == "W" || words[0] == "A") && runtime.GOOS == "windows") ||
    53  			((words[0] == "U" || words[0] == "A") && runtime.GOOS != "windows") {
    54  			newWord, err := ProcessWord(words[1], envs, '\\')
    55  
    56  			if err != nil {
    57  				newWord = "error"
    58  			}
    59  
    60  			if newWord != words[2] {
    61  				t.Fatalf("Error. Src: %s  Calc: %s  Expected: %s at line %d", words[1], newWord, words[2], lineCount)
    62  			}
    63  		}
    64  	}
    65  }
    66  
    67  func TestShellParser4Words(t *testing.T) {
    68  	fn := "wordsTest"
    69  
    70  	file, err := os.Open(fn)
    71  	if err != nil {
    72  		t.Fatalf("Can't open '%s': %s", err, fn)
    73  	}
    74  	defer file.Close()
    75  
    76  	envs := []string{}
    77  	scanner := bufio.NewScanner(file)
    78  	for scanner.Scan() {
    79  		line := scanner.Text()
    80  
    81  		if strings.HasPrefix(line, "#") {
    82  			continue
    83  		}
    84  
    85  		if strings.HasPrefix(line, "ENV ") {
    86  			line = strings.TrimLeft(line[3:], " ")
    87  			envs = append(envs, line)
    88  			continue
    89  		}
    90  
    91  		words := strings.Split(line, "|")
    92  		if len(words) != 2 {
    93  			t.Fatalf("Error in '%s' - should be exactly one | in: %q", fn, line)
    94  		}
    95  		test := strings.TrimSpace(words[0])
    96  		expected := strings.Split(strings.TrimLeft(words[1], " "), ",")
    97  
    98  		result, err := ProcessWords(test, envs, '\\')
    99  
   100  		if err != nil {
   101  			result = []string{"error"}
   102  		}
   103  
   104  		if len(result) != len(expected) {
   105  			t.Fatalf("Error. %q was suppose to result in %q, but got %q instead", test, expected, result)
   106  		}
   107  		for i, w := range expected {
   108  			if w != result[i] {
   109  				t.Fatalf("Error. %q was suppose to result in %q, but got %q instead", test, expected, result)
   110  			}
   111  		}
   112  	}
   113  }
   114  
   115  func TestGetEnv(t *testing.T) {
   116  	sw := &shellWord{
   117  		word: "",
   118  		envs: nil,
   119  		pos:  0,
   120  	}
   121  
   122  	sw.envs = []string{}
   123  	if sw.getEnv("foo") != "" {
   124  		t.Fatalf("2 - 'foo' should map to ''")
   125  	}
   126  
   127  	sw.envs = []string{"foo"}
   128  	if sw.getEnv("foo") != "" {
   129  		t.Fatalf("3 - 'foo' should map to ''")
   130  	}
   131  
   132  	sw.envs = []string{"foo="}
   133  	if sw.getEnv("foo") != "" {
   134  		t.Fatalf("4 - 'foo' should map to ''")
   135  	}
   136  
   137  	sw.envs = []string{"foo=bar"}
   138  	if sw.getEnv("foo") != "bar" {
   139  		t.Fatalf("5 - 'foo' should map to 'bar'")
   140  	}
   141  
   142  	sw.envs = []string{"foo=bar", "car=hat"}
   143  	if sw.getEnv("foo") != "bar" {
   144  		t.Fatalf("6 - 'foo' should map to 'bar'")
   145  	}
   146  	if sw.getEnv("car") != "hat" {
   147  		t.Fatalf("7 - 'car' should map to 'hat'")
   148  	}
   149  
   150  	// Make sure we grab the first 'car' in the list
   151  	sw.envs = []string{"foo=bar", "car=hat", "car=bike"}
   152  	if sw.getEnv("car") != "hat" {
   153  		t.Fatalf("8 - 'car' should map to 'hat'")
   154  	}
   155  }