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
|
require File.expand_path('../../../spec_helper', __FILE__)
require File.expand_path('../fixtures/classes', __FILE__)
# NOTE: A call to define_finalizer does not guarantee that the
# passed proc or callable will be called at any particular time.
# It is highly questionable whether these aspects of ObjectSpace
# should be spec'd at all.
describe "ObjectSpace.define_finalizer" do
it "raises an ArgumentError if the action does not respond to call" do
lambda {
ObjectSpace.define_finalizer("", mock("ObjectSpace.define_finalizer no #call"))
}.should raise_error(ArgumentError)
end
it "accepts an object and a proc" do
handler = lambda { |obj| obj }
ObjectSpace.define_finalizer("garbage", handler).should == [0, handler]
end
it "accepts an object and a callable" do
handler = mock("callable")
def handler.call(obj) end
ObjectSpace.define_finalizer("garbage", handler).should == [0, handler]
end
it "raises ArgumentError trying to define a finalizer on a non-reference" do
lambda {
ObjectSpace.define_finalizer(:blah) { 1 }
}.should raise_error(ArgumentError)
end
# see [ruby-core:24095]
with_feature :fork do
it "calls finalizer on process termination" do
rd, wr = IO.pipe
pid = Process.fork do
rd.close
handler = ObjectSpaceFixtures.scoped(wr)
obj = "Test"
ObjectSpace.define_finalizer(obj, handler)
exit 0
end
wr.close
begin
rd.read.should == "finalized"
ensure
rd.close
Process.wait pid
end
end
it "calls finalizer at exit even if it is self-referencing" do
rd, wr = IO.pipe
pid = Process.fork do
rd.close
obj = "Test"
handler = Proc.new { wr.write "finalized"; wr.close }
ObjectSpace.define_finalizer(obj, handler)
exit 0
end
wr.close
begin
rd.read.should == "finalized"
ensure
rd.close
Process.wait pid
end
end
# These specs are defined under the fork specs because there is no
# deterministic way to force finalizers to be run, except process exit, so
# we rely on that.
it "allows multiple finalizers with different 'callables' to be defined" do
rd1, wr1 = IO.pipe
rd2, wr2 = IO.pipe
pid = Kernel::fork do
rd1.close
rd2.close
obj = mock("ObjectSpace.define_finalizer multiple")
ObjectSpace.define_finalizer(obj, Proc.new { wr1.write "finalized1"; wr1.close })
ObjectSpace.define_finalizer(obj, Proc.new { wr2.write "finalized2"; wr2.close })
exit 0
end
wr1.close
wr2.close
rd1.read.should == "finalized1"
rd2.read.should == "finalized2"
rd1.close
rd2.close
Process.wait pid
end
end
end
|
