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