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
|
require File.expand_path('../../spec_helper', __FILE__)
require File.expand_path('../fixtures/return', __FILE__)
describe "The return keyword" do
it "returns any object directly" do
def r; return 1; end
r().should == 1
end
it "returns an single element array directly" do
def r; return [1]; end
r().should == [1]
end
it "returns an multi element array directly" do
def r; return [1,2]; end
r().should == [1,2]
end
it "returns nil by default" do
def r; return; end
r().should be_nil
end
describe "in a Thread" do
it "raises a LocalJumpError if used to exit a thread" do
lambda { Thread.new { return }.join }.should raise_error(LocalJumpError)
end
end
describe "when passed a splat" do
it "returns [] when the ary is empty" do
def r; ary = []; return *ary; end
r.should == []
end
it "returns the array when the array is size of 1" do
def r; ary = [1]; return *ary; end
r.should == [1]
end
it "returns the whole array when size is greater than 1" do
def r; ary = [1,2]; return *ary; end
r.should == [1,2]
def r; ary = [1,2,3]; return *ary; end
r.should == [1,2,3]
end
it "returns an array when used as a splat" do
def r; value = 1; return *value; end
r.should == [1]
end
it "calls 'to_a' on the splatted value first" do
def r
obj = Object.new
def obj.to_a
[1,2]
end
return *obj
end
r().should == [1,2]
end
end
describe "within a begin" do
before :each do
ScratchPad.record []
end
it "executes ensure before returning" do
def f()
begin
ScratchPad << :begin
return :begin
ScratchPad << :after_begin
ensure
ScratchPad << :ensure
end
ScratchPad << :function
end
f().should == :begin
ScratchPad.recorded.should == [:begin, :ensure]
end
it "returns last value returned in ensure" do
def f()
begin
ScratchPad << :begin
return :begin
ScratchPad << :after_begin
ensure
ScratchPad << :ensure
return :ensure
ScratchPad << :after_ensure
end
ScratchPad << :function
end
f().should == :ensure
ScratchPad.recorded.should == [:begin, :ensure]
end
it "executes nested ensures before returning" do
def f()
begin
begin
ScratchPad << :inner_begin
return :inner_begin
ScratchPad << :after_inner_begin
ensure
ScratchPad << :inner_ensure
end
ScratchPad << :outer_begin
return :outer_begin
ScratchPad << :after_outer_begin
ensure
ScratchPad << :outer_ensure
end
ScratchPad << :function
end
f().should == :inner_begin
ScratchPad.recorded.should == [:inner_begin, :inner_ensure, :outer_ensure]
end
it "returns last value returned in nested ensures" do
def f()
begin
begin
ScratchPad << :inner_begin
return :inner_begin
ScratchPad << :after_inner_begin
ensure
ScratchPad << :inner_ensure
return :inner_ensure
ScratchPad << :after_inner_ensure
end
ScratchPad << :outer_begin
return :outer_begin
ScratchPad << :after_outer_begin
ensure
ScratchPad << :outer_ensure
return :outer_ensure
ScratchPad << :after_outer_ensure
end
ScratchPad << :function
end
f().should == :outer_ensure
ScratchPad.recorded.should == [:inner_begin, :inner_ensure, :outer_ensure]
end
it "executes the ensure clause when begin/ensure are inside a lambda" do
lambda do
begin
return
ensure
ScratchPad.recorded << :ensure
end
end.call
ScratchPad.recorded.should == [:ensure]
end
end
describe "within a block" do
before :each do
ScratchPad.clear
end
it "causes lambda to return nil if invoked without any arguments" do
lambda { return; 456 }.call.should be_nil
end
it "causes lambda to return nil if invoked with an empty expression" do
lambda { return (); 456 }.call.should be_nil
end
it "causes lambda to return the value passed to return" do
lambda { return 123; 456 }.call.should == 123
end
it "causes the method that lexically encloses the block to return" do
ReturnSpecs::Blocks.new.enclosing_method.should == :return_value
ScratchPad.recorded.should == :before_return
end
it "returns from the lexically enclosing method even in case of chained calls" do
ReturnSpecs::NestedCalls.new.enclosing_method.should == :return_value
ScratchPad.recorded.should == :before_return
end
it "returns from the lexically enclosing method even in case of chained calls(in yield)" do
ReturnSpecs::NestedBlocks.new.enclosing_method.should == :return_value
ScratchPad.recorded.should == :before_return
end
it "causes the method to return even when the immediate parent has already returned" do
ReturnSpecs::SavedInnerBlock.new.start.should == :return_value
ScratchPad.recorded.should == :before_return
end
# jruby/jruby#3143
describe "downstream from a lambda" do
it "returns to its own return-capturing lexical enclosure" do
def a
->{ yield }.call
return 2
end
def b
a { return 1 }
end
b.should == 1
end
end
end
describe "within two blocks" do
it "causes the method that lexically encloses the block to return" do
def f
1.times { 1.times {return true}; false}; false
end
f.should be_true
end
end
describe "within define_method" do
it "goes through the method via a closure" do
ReturnSpecs::ThroughDefineMethod.new.outer.should == :good
end
it "stops at the method when the return is used directly" do
ReturnSpecs::DefineMethod.new.outer.should == :good
end
end
describe "invoked with a method call without parentheses with a block" do
it "returns the value returned from the method call" do
ReturnSpecs::MethodWithBlock.new.method1.should == 5
ReturnSpecs::MethodWithBlock.new.method2.should == [0, 1, 2]
end
end
end
|