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
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
|
require_relative '../../spec_helper'
require 'stringio'
describe "StringIO.open when passed [Object, mode]" do
it "uses the passed Object as the StringIO backend" do
io = StringIO.open(str = "example", "r")
io.string.should equal(str)
end
it "returns the blocks return value when yielding" do
ret = StringIO.open("example", "r") { :test }
ret.should equal(:test)
end
it "yields self to the passed block" do
io = nil
StringIO.open("example", "r") { |strio| io = strio }
io.should be_kind_of(StringIO)
end
it "closes self after yielding" do
io = nil
StringIO.open("example", "r") { |strio| io = strio }
io.closed?.should be_true
end
it "even closes self when an exception is raised while yielding" do
io = nil
begin
StringIO.open("example", "r") do |strio|
io = strio
raise "Error"
end
rescue
end
io.closed?.should be_true
end
it "sets self's string to nil after yielding" do
io = nil
StringIO.open("example", "r") { |strio| io = strio }
io.string.should be_nil
end
it "even sets self's string to nil when an exception is raised while yielding" do
io = nil
begin
StringIO.open("example", "r") do |strio|
io = strio
raise "Error"
end
rescue
end
io.string.should be_nil
end
it "sets the mode based on the passed mode" do
io = StringIO.open("example", "r")
io.closed_read?.should be_false
io.closed_write?.should be_true
io = StringIO.open("example", "rb")
io.closed_read?.should be_false
io.closed_write?.should be_true
io = StringIO.open("example", "r+")
io.closed_read?.should be_false
io.closed_write?.should be_false
io = StringIO.open("example", "rb+")
io.closed_read?.should be_false
io.closed_write?.should be_false
io = StringIO.open("example", "w")
io.closed_read?.should be_true
io.closed_write?.should be_false
io = StringIO.open("example", "wb")
io.closed_read?.should be_true
io.closed_write?.should be_false
io = StringIO.open("example", "w+")
io.closed_read?.should be_false
io.closed_write?.should be_false
io = StringIO.open("example", "wb+")
io.closed_read?.should be_false
io.closed_write?.should be_false
io = StringIO.open("example", "a")
io.closed_read?.should be_true
io.closed_write?.should be_false
io = StringIO.open("example", "ab")
io.closed_read?.should be_true
io.closed_write?.should be_false
io = StringIO.open("example", "a+")
io.closed_read?.should be_false
io.closed_write?.should be_false
io = StringIO.open("example", "ab+")
io.closed_read?.should be_false
io.closed_write?.should be_false
end
it "allows passing the mode as an Integer" do
io = StringIO.open("example", IO::RDONLY)
io.closed_read?.should be_false
io.closed_write?.should be_true
io = StringIO.open("example", IO::RDWR)
io.closed_read?.should be_false
io.closed_write?.should be_false
io = StringIO.open("example", IO::WRONLY)
io.closed_read?.should be_true
io.closed_write?.should be_false
io = StringIO.open("example", IO::WRONLY | IO::TRUNC)
io.closed_read?.should be_true
io.closed_write?.should be_false
io = StringIO.open("example", IO::RDWR | IO::TRUNC)
io.closed_read?.should be_false
io.closed_write?.should be_false
io = StringIO.open("example", IO::WRONLY | IO::APPEND)
io.closed_read?.should be_true
io.closed_write?.should be_false
io = StringIO.open("example", IO::RDWR | IO::APPEND)
io.closed_read?.should be_false
io.closed_write?.should be_false
end
it "raises a FrozenError when passed a frozen String in truncate mode as StringIO backend" do
-> { StringIO.open("example".freeze, IO::TRUNC) }.should raise_error(FrozenError)
end
it "tries to convert the passed mode to a String using #to_str" do
obj = mock('to_str')
obj.should_receive(:to_str).and_return("r")
io = StringIO.open("example", obj)
io.closed_read?.should be_false
io.closed_write?.should be_true
end
it "raises an Errno::EACCES error when passed a frozen string with a write-mode" do
(str = "example").freeze
-> { StringIO.open(str, "r+") }.should raise_error(Errno::EACCES)
-> { StringIO.open(str, "w") }.should raise_error(Errno::EACCES)
-> { StringIO.open(str, "a") }.should raise_error(Errno::EACCES)
end
end
describe "StringIO.open when passed [Object]" do
it "uses the passed Object as the StringIO backend" do
io = StringIO.open(str = "example")
io.string.should equal(str)
end
it "yields self to the passed block" do
io = nil
ret = StringIO.open("example") { |strio| io = strio }
io.should equal(ret)
end
it "sets the mode to read-write" do
io = StringIO.open("example")
io.closed_read?.should be_false
io.closed_write?.should be_false
end
it "tries to convert the passed Object to a String using #to_str" do
obj = mock('to_str')
obj.should_receive(:to_str).and_return("example")
io = StringIO.open(obj)
io.string.should == "example"
end
it "automatically sets the mode to read-only when passed a frozen string" do
(str = "example").freeze
io = StringIO.open(str)
io.closed_read?.should be_false
io.closed_write?.should be_true
end
end
describe "StringIO.open when passed no arguments" do
it "yields self to the passed block" do
io = nil
ret = StringIO.open { |strio| io = strio }
io.should equal(ret)
end
it "sets the mode to read-write" do
io = StringIO.open
io.closed_read?.should be_false
io.closed_write?.should be_false
end
it "uses an empty String as the StringIO backend" do
StringIO.open.string.should == ""
end
end
|
