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
|
require "spec"
private class PartialReaderIO < IO
@slice : Bytes
def initialize(data : String)
@slice = data.to_slice
end
def read(slice : Bytes)
return 0 if @slice.size == 0
max_read_size = {slice.size, @slice.size}.min
read_size = rand(1..max_read_size)
slice.copy_from(@slice[0, read_size])
@slice += read_size
read_size
end
def write(slice : Bytes) : NoReturn
raise "write"
end
end
describe "IO::Delimited" do
describe "#read" do
it "doesn't read past the limit" do
io = IO::Memory.new("abcderzzrfgzr")
delimited = IO::Delimited.new(io, read_delimiter: "zr")
delimited.gets_to_end.should eq("abcderz")
io.gets_to_end.should eq("fgzr")
end
it "doesn't read past the limit (char-by-char)" do
io = IO::Memory.new("abcderzzrfg")
delimited = IO::Delimited.new(io, read_delimiter: "zr")
delimited.read_char.should eq('a')
delimited.read_char.should eq('b')
delimited.read_char.should eq('c')
delimited.read_char.should eq('d')
delimited.read_char.should eq('e')
delimited.read_char.should eq('r')
delimited.read_char.should eq('z')
delimited.read_char.should eq(nil)
delimited.read_char.should eq(nil)
delimited.read_char.should eq(nil)
delimited.read_char.should eq(nil)
io.read_char.should eq('f')
io.read_char.should eq('g')
end
it "doesn't clobber active_delimiter_buffer" do
io = IO::Memory.new("ab12312")
delimited = IO::Delimited.new(io, read_delimiter: "12345")
delimited.gets_to_end.should eq("ab12312")
end
it "handles the delimiter at the start" do
io = IO::Memory.new("ab12312")
delimited = IO::Delimited.new(io, read_delimiter: "ab1")
delimited.read_char.should eq(nil)
end
it "handles the delimiter at the end" do
io = IO::Memory.new("ab12312z")
delimited = IO::Delimited.new(io, read_delimiter: "z")
delimited.gets_to_end.should eq("ab12312")
end
it "handles nearly a delimiter at the end" do
io = IO::Memory.new("ab12312")
delimited = IO::Delimited.new(io, read_delimiter: "122")
delimited.gets_to_end.should eq("ab12312")
end
it "doesn't clobber the buffer on closely-offset partial matches" do
io = IO::Memory.new("abab1234abcdefgh")
delimited = IO::Delimited.new(io, read_delimiter: "abcdefgh")
delimited.gets_to_end.should eq("abab1234")
end
it "handles partial reads" do
io = PartialReaderIO.new("abab1234abcdefgh")
delimited = IO::Delimited.new(io, read_delimiter: "abcdefgh")
delimited.gets_to_end.should eq("abab1234")
end
end
describe "#write" do
it "raises" do
delimited = IO::Delimited.new(IO::Memory.new, read_delimiter: "zr")
expect_raises(IO::Error, "Can't write to IO::Delimited") do
delimited.puts "test string"
end
end
end
describe "#close" do
it "stops reading" do
io = IO::Memory.new "abcdefg"
delimited = IO::Delimited.new(io, read_delimiter: "zr")
delimited.read_char.should eq('a')
delimited.read_char.should eq('b')
delimited.close
delimited.closed?.should eq(true)
expect_raises(IO::Error, "Closed stream") do
delimited.read_char
end
end
it "closes the underlying stream if sync_close is true" do
io = IO::Memory.new "abcdefg"
delimited = IO::Delimited.new(io, read_delimiter: "zr", sync_close: true)
delimited.sync_close?.should eq(true)
io.closed?.should eq(false)
delimited.close
io.closed?.should eq(true)
end
end
end
|
