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
|
# encoding: UTF-8
require 'minitest/autorun'
require 'archive/support/ioextensions.rb'
require 'archive/support/binary_stringio'
describe "IOExtensions.read_exactly" do
it "reads and returns length bytes from a given IO object" do
io = BinaryStringIO.new('This is test data')
IOExtensions.read_exactly(io, 4).must_equal 'This'
IOExtensions.read_exactly(io, 13).must_equal ' is test data'
end
it "raises an error when too little data is available" do
io = BinaryStringIO.new('This is test data')
lambda do
IOExtensions.read_exactly(io, 18)
end.must_raise EOFError
end
it "takes an optional buffer argument and fills it" do
io = BinaryStringIO.new('This is test data')
buffer = ''
IOExtensions.read_exactly(io, 4, buffer)
buffer.must_equal 'This'
buffer = ''
IOExtensions.read_exactly(io, 13, buffer)
buffer.must_equal ' is test data'
end
it "empties the optional buffer before filling it" do
io = BinaryStringIO.new('This is test data')
buffer = ''
IOExtensions.read_exactly(io, 4, buffer)
buffer.must_equal 'This'
IOExtensions.read_exactly(io, 13, buffer)
buffer.must_equal ' is test data'
end
it "can read 0 bytes" do
io = BinaryStringIO.new('This is test data')
IOExtensions.read_exactly(io, 0).must_equal ''
end
it "retries partial reads" do
io = MiniTest::Mock.new
io.expect(:read, 'hello', [10])
io.expect(:read, 'hello', [5])
IOExtensions.read_exactly(io, 10).must_equal 'hellohello'
end
end
|
