github.com/rakyll/go@v0.0.0-20170216000551-64c02460d703/src/mime/multipart/writer_test.go (about)

     1  // Copyright 2011 The Go 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 multipart
     6  
     7  import (
     8  	"bytes"
     9  	"io/ioutil"
    10  	"net/textproto"
    11  	"strings"
    12  	"testing"
    13  )
    14  
    15  func TestWriter(t *testing.T) {
    16  	fileContents := []byte("my file contents")
    17  
    18  	var b bytes.Buffer
    19  	w := NewWriter(&b)
    20  	{
    21  		part, err := w.CreateFormFile("myfile", "my-file.txt")
    22  		if err != nil {
    23  			t.Fatalf("CreateFormFile: %v", err)
    24  		}
    25  		part.Write(fileContents)
    26  		err = w.WriteField("key", "val")
    27  		if err != nil {
    28  			t.Fatalf("WriteField: %v", err)
    29  		}
    30  		part.Write([]byte("val"))
    31  		err = w.Close()
    32  		if err != nil {
    33  			t.Fatalf("Close: %v", err)
    34  		}
    35  		s := b.String()
    36  		if len(s) == 0 {
    37  			t.Fatal("String: unexpected empty result")
    38  		}
    39  		if s[0] == '\r' || s[0] == '\n' {
    40  			t.Fatal("String: unexpected newline")
    41  		}
    42  	}
    43  
    44  	r := NewReader(&b, w.Boundary())
    45  
    46  	part, err := r.NextPart()
    47  	if err != nil {
    48  		t.Fatalf("part 1: %v", err)
    49  	}
    50  	if g, e := part.FormName(), "myfile"; g != e {
    51  		t.Errorf("part 1: want form name %q, got %q", e, g)
    52  	}
    53  	slurp, err := ioutil.ReadAll(part)
    54  	if err != nil {
    55  		t.Fatalf("part 1: ReadAll: %v", err)
    56  	}
    57  	if e, g := string(fileContents), string(slurp); e != g {
    58  		t.Errorf("part 1: want contents %q, got %q", e, g)
    59  	}
    60  
    61  	part, err = r.NextPart()
    62  	if err != nil {
    63  		t.Fatalf("part 2: %v", err)
    64  	}
    65  	if g, e := part.FormName(), "key"; g != e {
    66  		t.Errorf("part 2: want form name %q, got %q", e, g)
    67  	}
    68  	slurp, err = ioutil.ReadAll(part)
    69  	if err != nil {
    70  		t.Fatalf("part 2: ReadAll: %v", err)
    71  	}
    72  	if e, g := "val", string(slurp); e != g {
    73  		t.Errorf("part 2: want contents %q, got %q", e, g)
    74  	}
    75  
    76  	part, err = r.NextPart()
    77  	if part != nil || err == nil {
    78  		t.Fatalf("expected end of parts; got %v, %v", part, err)
    79  	}
    80  }
    81  
    82  func TestWriterSetBoundary(t *testing.T) {
    83  	var b bytes.Buffer
    84  	w := NewWriter(&b)
    85  	tests := []struct {
    86  		b  string
    87  		ok bool
    88  	}{
    89  		{"abc", true},
    90  		{"", false},
    91  		{"ungültig", false},
    92  		{"!", false},
    93  		{strings.Repeat("x", 70), true},
    94  		{strings.Repeat("x", 71), false},
    95  		{"bad!ascii!", false},
    96  		{"my-separator", true},
    97  	}
    98  	for i, tt := range tests {
    99  		err := w.SetBoundary(tt.b)
   100  		got := err == nil
   101  		if got != tt.ok {
   102  			t.Errorf("%d. boundary %q = %v (%v); want %v", i, tt.b, got, err, tt.ok)
   103  		} else if tt.ok {
   104  			got := w.Boundary()
   105  			if got != tt.b {
   106  				t.Errorf("boundary = %q; want %q", got, tt.b)
   107  			}
   108  		}
   109  	}
   110  	w.Close()
   111  	if got := b.String(); !strings.Contains(got, "\r\n--my-separator--\r\n") {
   112  		t.Errorf("expected my-separator in output. got: %q", got)
   113  	}
   114  }
   115  
   116  func TestWriterBoundaryGoroutines(t *testing.T) {
   117  	// Verify there's no data race accessing any lazy boundary if it's used by
   118  	// different goroutines. This was previously broken by
   119  	// https://codereview.appspot.com/95760043/ and reverted in
   120  	// https://codereview.appspot.com/117600043/
   121  	w := NewWriter(ioutil.Discard)
   122  	done := make(chan int)
   123  	go func() {
   124  		w.CreateFormField("foo")
   125  		done <- 1
   126  	}()
   127  	w.Boundary()
   128  	<-done
   129  }
   130  
   131  func TestSortedHeader(t *testing.T) {
   132  	var buf bytes.Buffer
   133  	w := NewWriter(&buf)
   134  	if err := w.SetBoundary("MIMEBOUNDARY"); err != nil {
   135  		t.Fatalf("Error setting mime boundary: %v", err)
   136  	}
   137  
   138  	header := textproto.MIMEHeader{
   139  		"A": {"2"},
   140  		"B": {"5", "7", "6"},
   141  		"C": {"4"},
   142  		"M": {"3"},
   143  		"Z": {"1"},
   144  	}
   145  
   146  	part, err := w.CreatePart(header)
   147  	if err != nil {
   148  		t.Fatalf("Unable to create part: %v", err)
   149  	}
   150  	part.Write([]byte("foo"))
   151  
   152  	w.Close()
   153  
   154  	want := "--MIMEBOUNDARY\r\nA: 2\r\nB: 5\r\nB: 7\r\nB: 6\r\nC: 4\r\nM: 3\r\nZ: 1\r\n\r\nfoo\r\n--MIMEBOUNDARY--\r\n"
   155  	if want != buf.String() {
   156  		t.Fatalf("\n got: %q\nwant: %q\n", buf.String(), want)
   157  	}
   158  }