blob: 6ba0edf1745e8359f795a4595b25497f3065ad0f (
plain)
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
|
require_relative '../../spec_helper'
require_relative 'fixtures/common'
describe "Enumerator#rewind" do
before :each do
@enum = 1.upto(3)
end
it "resets the enumerator to its initial state" do
@enum.next.should == 1
@enum.next.should == 2
@enum.rewind
@enum.next.should == 1
end
it "returns self" do
@enum.rewind.should.equal? @enum
end
it "has no effect on a new enumerator" do
@enum.rewind
@enum.next.should == 1
end
it "has no effect if called multiple, consecutive times" do
@enum.next.should == 1
@enum.rewind
@enum.rewind
@enum.next.should == 1
end
it "works with peek to reset the position" do
@enum.next
@enum.next
@enum.rewind
@enum.next
@enum.peek.should == 2
end
it "calls the enclosed object's rewind method if one exists" do
obj = mock('rewinder')
enum = obj.to_enum
obj.should_receive(:each).at_most(1)
obj.should_receive(:rewind)
enum.rewind
end
it "does nothing if the object doesn't have a #rewind method" do
obj = mock('rewinder')
enum = obj.to_enum
obj.should_receive(:each).at_most(1)
enum.rewind.should == enum
end
end
describe "Enumerator#rewind" do
before :each do
ScratchPad.record []
@enum = EnumeratorSpecs::Feed.new.to_enum(:each)
end
it "clears a pending #feed value" do
@enum.next
@enum.feed :a
@enum.rewind
@enum.next
@enum.next
ScratchPad.recorded.should == [nil]
end
end
|