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
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
|
local dbuffer = require "util.dbuffer";
describe("util.dbuffer", function ()
describe("#new", function ()
it("has a constructor", function ()
assert.Function(dbuffer.new);
end);
it("can be created", function ()
assert.truthy(dbuffer.new());
end);
it("won't create an empty buffer", function ()
assert.falsy(dbuffer.new(0));
end);
it("won't create a negatively sized buffer", function ()
assert.falsy(dbuffer.new(-1));
end);
end);
describe(":write", function ()
local b = dbuffer.new();
it("works", function ()
assert.truthy(b:write("hi"));
end);
end);
describe(":read", function ()
it("supports optional bytes parameter", function ()
-- should return the frontmost chunk
local b = dbuffer.new();
assert.truthy(b:write("hello"));
assert.truthy(b:write(" "));
assert.truthy(b:write("world"));
assert.equal("h", b:read(1));
assert.equal("ello", b:read());
assert.equal(" ", b:read());
assert.equal("world", b:read());
end);
end);
describe(":read_until", function ()
it("works", function ()
local b = dbuffer.new();
b:write("hello\n");
b:write("world");
b:write("\n");
b:write("\n\n");
b:write("stuff");
b:write("more\nand more");
assert.equal(nil, b:read_until("."));
assert.equal(nil, b:read_until("%"));
assert.equal("hello\n", b:read_until("\n"));
assert.equal("world\n", b:read_until("\n"));
assert.equal("\n", b:read_until("\n"));
assert.equal("\n", b:read_until("\n"));
assert.equal("stu", b:read(3));
assert.equal("ffmore\n", b:read_until("\n"));
assert.equal(nil, b:read_until("\n"));
assert.equal("and more", b:read_chunk());
end);
it("works with multi-character sequences", function ()
local b = dbuffer.new();
b:write("hello\r\n");
b:write("world");
b:write("\r\n");
b:write("\r\n\r\n");
b:write("stuff");
b:write("more\r\nand more");
assert.equal(nil, b:read_until("."));
assert.equal(nil, b:read_until("%"));
assert.equal("hello\r\n", b:read_until("\r\n"));
assert.equal("world\r\n", b:read_until("\r\n"));
assert.equal("\r\n", b:read_until("\r\n"));
assert.equal("\r\n", b:read_until("\r\n"));
assert.equal("stu", b:read(3));
assert.equal("ffmore\r\n", b:read_until("\r\n"));
assert.equal(nil, b:read_until("\r\n"));
assert.equal("and more", b:read_chunk());
end);
end);
describe(":discard", function ()
local b = dbuffer.new();
it("works", function ()
assert.truthy(b:write("hello world"));
assert.truthy(b:discard(6));
assert.equal(5, b:length());
assert.equal(5, b:len());
assert.equal("world", b:read(5));
end);
end);
describe(":collapse()", function ()
it("works on an empty buffer", function ()
local b = dbuffer.new();
b:collapse();
end);
end);
describe(":sub", function ()
-- Helper function to compare buffer:sub() with string:sub()
local s = "hello world";
local function test_sub(b, x, y)
local string_result, buffer_result = s:sub(x, y), b:sub(x, y);
assert.equals(string_result, buffer_result, ("buffer:sub(%d, %s) does not match string:sub()"):format(x, y and ("%d"):format(y) or "nil"));
end
it("works", function ()
local b = dbuffer.new();
assert.truthy(b:write("hello world"));
assert.equals("hello", b:sub(1, 5));
end);
it("works after discard", function ()
local b = dbuffer.new(256);
assert.truthy(b:write("foobar"));
assert.equals("foobar", b:sub(1, 6));
assert.truthy(b:discard(3)); -- consume "foo"
assert.equals("bar", b:sub(1, 3));
end);
it("supports optional end parameter", function ()
local b = dbuffer.new();
assert.truthy(b:write("hello world"));
assert.equals("hello world", b:sub(1));
assert.equals("world", b:sub(-5));
end);
it("is equivalent to string:sub", function ()
local b = dbuffer.new(11);
assert.truthy(b:write(s));
for i = -13, 13 do
for j = -13, 13 do
test_sub(b, i, j);
end
end
end);
end);
describe(":byte", function ()
-- Helper function to compare buffer:byte() with string:byte()
local s = "hello world"
local function test_byte(b, x, y)
local string_result, buffer_result = {s:byte(x, y)}, {b:byte(x, y)};
assert.same(string_result, buffer_result, ("buffer:byte(%d, %s) does not match string:byte()"):format(x, y and ("%d"):format(y) or "nil"));
end
it("is equivalent to string:byte", function ()
local b = dbuffer.new(11);
assert.truthy(b:write(s));
test_byte(b, 1);
test_byte(b, 3);
test_byte(b, -1);
test_byte(b, -3);
for i = -13, 13 do
for j = -13, 13 do
test_byte(b, i, j);
end
end
end);
it("works with characters > 127", function ()
local b = dbuffer.new();
b:write(string.char(0, 140));
local r = { b:byte(1, 2) };
assert.same({ 0, 140 }, r);
end);
it("works on an empty buffer", function ()
local b = dbuffer.new();
assert.equal("", b:sub(1,1));
end);
end);
end);
|
