1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
|
// Copyright 2009 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package io
import (
"io";
"rand";
"testing";
)
const N = 10000; // make this bigger for a larger (and slower) test
var data []byte; // test data for write tests
func init() {
data = make([]byte, N);
for i := 0; i < len(data); i++ {
data[i] = 'a' + byte(i % 26)
}
}
// Verify that contents of buf match the string s.
func check(t *testing.T, testname string, buf *ByteBuffer, s string) {
if buf.Len() != len(buf.Data()) {
t.Errorf("%s: buf.Len() == %d, len(buf.Data()) == %d\n", testname, buf.Len(), len(buf.Data()))
}
if buf.Len() != len(s) {
t.Errorf("%s: buf.Len() == %d, len(s) == %d\n", testname, buf.Len(), len(s))
}
if string(buf.Data()) != s {
t.Errorf("%s: string(buf.Data()) == %q, s == %q\n", testname, string(buf.Data()), s)
}
}
// Fill buf through n writes of fub.
// The initial contents of buf corresponds to the string s;
// the result is the final contents of buf returned as a string.
func fill(t *testing.T, testname string, buf *ByteBuffer, s string, n int, fub []byte) string {
check(t, testname + " (fill 1)", buf, s);
for ; n > 0; n-- {
m, err := buf.Write(fub);
if m != len(fub) {
t.Errorf(testname + " (fill 2): m == %d, expected %d\n", m, len(fub));
}
if err != nil {
t.Errorf(testname + " (fill 3): err should always be nil, found err == %s\n", err);
}
s += string(fub);
check(t, testname + " (fill 4)", buf, s);
}
return s;
}
// Empty buf through repeated reads into fub.
// The initial contents of buf corresponds to the string s.
func empty(t *testing.T, testname string, buf *ByteBuffer, s string, fub []byte) {
check(t, testname + " (empty 1)", buf, s);
for {
n, err := buf.Read(fub);
if n == 0 {
break;
}
if err != nil {
t.Errorf(testname + " (empty 2): err should always be nil, found err == %s\n", err);
}
s = s[n : len(s)];
check(t, testname + " (empty 3)", buf, s);
}
check(t, testname + " (empty 4)", buf, "");
}
func TestBasicOperations(t *testing.T) {
var buf ByteBuffer;
for i := 0; i < 5; i++ {
check(t, "TestBasicOperations (1)", &buf, "");
buf.Reset();
check(t, "TestBasicOperations (2)", &buf, "");
buf.Truncate(0);
check(t, "TestBasicOperations (3)", &buf, "");
n, err := buf.Write(data[0 : 1]);
if n != 1 {
t.Errorf("wrote 1 byte, but n == %d\n", n);
}
if err != nil {
t.Errorf("err should always be nil, but err == %s\n", err);
}
check(t, "TestBasicOperations (4)", &buf, "a");
buf.WriteByte(data[1]);
check(t, "TestBasicOperations (5)", &buf, "ab");
n, err = buf.Write(data[2 : 26]);
if n != 24 {
t.Errorf("wrote 25 bytes, but n == %d\n", n);
}
check(t, "TestBasicOperations (6)", &buf, string(data[0 : 26]));
buf.Truncate(26);
check(t, "TestBasicOperations (7)", &buf, string(data[0 : 26]));
buf.Truncate(20);
check(t, "TestBasicOperations (8)", &buf, string(data[0 : 20]));
empty(t, "TestBasicOperations (9)", &buf, string(data[0 : 20]), make([]byte, 5));
empty(t, "TestBasicOperations (10)", &buf, "", make([]byte, 100));
}
}
func TestLargeWrites(t *testing.T) {
var buf ByteBuffer;
for i := 3; i < 30; i += 3 {
s := fill(t, "TestLargeWrites (1)", &buf, "", 5, data);
empty(t, "TestLargeWrites (2)", &buf, s, make([]byte, len(data)/i));
}
check(t, "TestLargeWrites (3)", &buf, "");
}
func TestLargeReads(t *testing.T) {
var buf ByteBuffer;
for i := 3; i < 30; i += 3 {
s := fill(t, "TestLargeReads (1)", &buf, "", 5, data[0 : len(data)/i]);
empty(t, "TestLargeReads (2)", &buf, s, make([]byte, len(data)));
}
check(t, "TestLargeReads (3)", &buf, "");
}
func TestMixedReadsAndWrites(t *testing.T) {
var buf ByteBuffer;
s := "";
for i := 0; i < 50; i++ {
wlen := rand.Intn(len(data));
s = fill(t, "TestMixedReadsAndWrites (1)", &buf, s, 1, data[0 : wlen]);
rlen := rand.Intn(len(data));
fub := make([]byte, rlen);
n, err := buf.Read(fub);
s = s[n : len(s)];
}
empty(t, "TestMixedReadsAndWrites (2)", &buf, s, make([]byte, buf.Len()));
}
|
