summaryrefslogtreecommitdiff
path: root/spec/rubyspec/library/zlib/gzipreader/getc_spec.rb
blob: a3c4aecf766f35d34e8bf6697bcef9249ecb46c6 (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
require File.expand_path('../../../../spec_helper', __FILE__)
require 'stringio'
require 'zlib'

describe "GzipReader#getc" do

  before :each do
    @data = '12345abcde'
    @zip = [31, 139, 8, 0, 44, 220, 209, 71, 0, 3, 51, 52, 50, 54, 49, 77,
            76, 74, 78, 73, 5, 0, 157, 5, 0, 36, 10, 0, 0, 0].pack('C*')
    @io = StringIO.new @zip
  end

  it "returns the next character from the stream" do
    gz = Zlib::GzipReader.new @io
    gz.pos.should == 0

    gz.getc.should == '1'
    gz.getc.should == '2'
    gz.getc.should == '3'
    gz.getc.should == '4'
    gz.getc.should == '5'
  end

  it "increments position" do
    gz = Zlib::GzipReader.new @io
    (0..@data.size).each do |i|
      gz.pos.should == i
      gz.getc
    end
  end

  it "returns nil at the end of the stream" do
    gz = Zlib::GzipReader.new @io
    gz.read
    pos = gz.pos
    gz.getc.should be_nil
    gz.pos.should == pos
  end

end