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
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
|
require_relative '../spec_helper'
require_relative 'fixtures/ensure'
describe "An ensure block inside a begin block" do
before :each do
ScratchPad.record []
end
it "is executed when an exception is raised in it's corresponding begin block" do
-> {
begin
ScratchPad << :begin
raise EnsureSpec::Error
ensure
ScratchPad << :ensure
end
}.should raise_error(EnsureSpec::Error)
ScratchPad.recorded.should == [:begin, :ensure]
end
it "is executed when an exception is raised and rescued in it's corresponding begin block" do
begin
ScratchPad << :begin
raise "An exception occurred!"
rescue
ScratchPad << :rescue
ensure
ScratchPad << :ensure
end
ScratchPad.recorded.should == [:begin, :rescue, :ensure]
end
it "is executed even when a symbol is thrown in it's corresponding begin block" do
catch(:symbol) do
begin
ScratchPad << :begin
throw(:symbol)
rescue
ScratchPad << :rescue
ensure
ScratchPad << :ensure
end
end
ScratchPad.recorded.should == [:begin, :ensure]
end
it "is executed when nothing is raised or thrown in it's corresponding begin block" do
begin
ScratchPad << :begin
rescue
ScratchPad << :rescue
ensure
ScratchPad << :ensure
end
ScratchPad.recorded.should == [:begin, :ensure]
end
it "has no return value" do
begin
:begin
ensure
:ensure
end.should == :begin
end
it "sets exception cause if raises exception in block and in ensure" do
-> {
begin
raise "from block"
ensure
raise "from ensure"
end
}.should raise_error(RuntimeError, "from ensure") { |e|
e.cause.message.should == "from block"
}
end
end
describe "The value of an ensure expression," do
it "in no-exception scenarios, is the value of the last statement of the protected body" do
begin
v = 1
eval('x=1') # to prevent opts from triggering
v
ensure
v = 2
end.should == 1
end
it "when an exception is rescued, is the value of the rescuing block" do
begin
raise 'foo'
rescue
v = 3
ensure
v = 2
end.should == 3
end
end
describe "An ensure block inside a method" do
before :each do
@obj = EnsureSpec::Container.new
end
it "is executed when an exception is raised in the method" do
-> { @obj.raise_in_method_with_ensure }.should raise_error(EnsureSpec::Error)
@obj.executed.should == [:method, :ensure]
end
it "is executed when an exception is raised and rescued in the method" do
@obj.raise_and_rescue_in_method_with_ensure
@obj.executed.should == [:method, :rescue, :ensure]
end
it "is executed even when a symbol is thrown in the method" do
catch(:symbol) { @obj.throw_in_method_with_ensure }
@obj.executed.should == [:method, :ensure]
end
it "has no impact on the method's implicit return value" do
@obj.implicit_return_in_method_with_ensure.should == :method
end
it "has an impact on the method's explicit return value" do
@obj.explicit_return_in_method_with_ensure.should == :ensure
end
it "has an impact on the method's explicit return value from rescue if returns explicitly" do
@obj.explicit_return_in_rescue_and_explicit_return_in_ensure.should == "returned in ensure"
end
it "has no impact on the method's explicit return value from rescue if returns implicitly" do
@obj.explicit_return_in_rescue_and_implicit_return_in_ensure.should == "returned in rescue"
end
it "suppresses exception raised in method if returns value explicitly" do
@obj.raise_and_explicit_return_in_ensure.should == "returned in ensure"
end
it "suppresses exception raised in rescue if returns value explicitly" do
@obj.raise_in_rescue_and_explicit_return_in_ensure.should == "returned in ensure"
end
it "overrides exception raised in rescue if raises exception itself" do
-> {
@obj.raise_in_rescue_and_raise_in_ensure
}.should raise_error(RuntimeError, "raised in ensure")
end
it "suppresses exception raised in method if raises exception itself" do
-> {
@obj.raise_in_method_and_raise_in_ensure
}.should raise_error(RuntimeError, "raised in ensure")
end
end
describe "An ensure block inside a class" do
before :each do
ScratchPad.record []
end
it "is executed when an exception is raised" do
-> {
eval <<-ruby
class EnsureInClassExample
ScratchPad << :class
raise EnsureSpec::Error
ensure
ScratchPad << :ensure
end
ruby
}.should raise_error(EnsureSpec::Error)
ScratchPad.recorded.should == [:class, :ensure]
end
it "is executed when an exception is raised and rescued" do
eval <<-ruby
class EnsureInClassExample
ScratchPad << :class
raise
rescue
ScratchPad << :rescue
ensure
ScratchPad << :ensure
end
ruby
ScratchPad.recorded.should == [:class, :rescue, :ensure]
end
it "is executed even when a symbol is thrown" do
catch(:symbol) do
eval <<-ruby
class EnsureInClassExample
ScratchPad << :class
throw(:symbol)
rescue
ScratchPad << :rescue
ensure
ScratchPad << :ensure
end
ruby
end
ScratchPad.recorded.should == [:class, :ensure]
end
it "is executed when nothing is raised or thrown" do
eval <<-ruby
class EnsureInClassExample
ScratchPad << :class
rescue
ScratchPad << :rescue
ensure
ScratchPad << :ensure
end
ruby
ScratchPad.recorded.should == [:class, :ensure]
end
it "has no return value" do
result = eval <<-ruby
class EnsureInClassExample
:class
ensure
:ensure
end
ruby
result.should == :class
end
end
describe "An ensure block inside {} block" do
it "is not allowed" do
-> {
eval <<-ruby
lambda {
raise
ensure
}
ruby
}.should raise_error(SyntaxError)
end
end
describe "An ensure block inside 'do end' block" do
before :each do
ScratchPad.record []
end
it "is executed when an exception is raised in it's corresponding begin block" do
-> {
eval(<<-ruby).call
lambda do
ScratchPad << :begin
raise EnsureSpec::Error
ensure
ScratchPad << :ensure
end
ruby
}.should raise_error(EnsureSpec::Error)
ScratchPad.recorded.should == [:begin, :ensure]
end
it "is executed when an exception is raised and rescued in it's corresponding begin block" do
eval(<<-ruby).call
lambda do
ScratchPad << :begin
raise "An exception occurred!"
rescue
ScratchPad << :rescue
ensure
ScratchPad << :ensure
end
ruby
ScratchPad.recorded.should == [:begin, :rescue, :ensure]
end
it "is executed even when a symbol is thrown in it's corresponding begin block" do
catch(:symbol) do
eval(<<-ruby).call
lambda do
ScratchPad << :begin
throw(:symbol)
rescue
ScratchPad << :rescue
ensure
ScratchPad << :ensure
end
ruby
end
ScratchPad.recorded.should == [:begin, :ensure]
end
it "is executed when nothing is raised or thrown in it's corresponding begin block" do
eval(<<-ruby).call
lambda do
ScratchPad << :begin
rescue
ScratchPad << :rescue
ensure
ScratchPad << :ensure
end
ruby
ScratchPad.recorded.should == [:begin, :ensure]
end
it "has no return value" do
result = eval(<<-ruby).call
lambda do
:begin
ensure
:ensure
end
ruby
result.should == :begin
end
end
|
