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
|
# -*- encoding: utf-8 -*-
require File.expand_path('../../../spec_helper', __FILE__)
describe "String#getbyte" do
it "returns an Integer if given a valid index" do
"a".getbyte(0).should be_kind_of(Integer)
end
it "starts indexing at 0" do
"b".getbyte(0).should == 98
# copy-on-write case
_str1, str2 = "fooXbar".split("X")
str2.getbyte(0).should == 98
end
it "counts from the end of the String if given a negative argument" do
"glark".getbyte(-1).should == "glark".getbyte(4)
# copy-on-write case
_str1, str2 = "fooXbar".split("X")
str2.getbyte(-1).should == 114
end
it "returns an Integer between 0 and 255" do
"\x00".getbyte(0).should == 0
[0xFF].pack('C').getbyte(0).should == 255
256.chr('utf-8').getbyte(0).should == 196
256.chr('utf-8').getbyte(1).should == 128
end
it "regards a multi-byte character as having multiple bytes" do
chr = "\u{998}"
chr.bytesize.should == 3
chr.getbyte(0).should == 224
chr.getbyte(1).should == 166
chr.getbyte(2).should == 152
end
it "mirrors the output of #bytes" do
xDE = [0xDE].pack('C').force_encoding('utf-8')
str = "UTF-8 (\u{9865}} characters and hex escapes (#{xDE})"
str.bytes.to_a.each_with_index do |byte, index|
str.getbyte(index).should == byte
end
end
it "interprets bytes relative to the String's encoding" do
str = "\u{333}"
str.encode('utf-8').getbyte(0).should_not == str.encode('utf-16le').getbyte(0)
end
it "returns nil for out-of-bound indexes" do
"g".getbyte(1).should be_nil
end
it "regards the empty String as containing no bytes" do
"".getbyte(0).should be_nil
end
it "raises an ArgumentError unless given one argument" do
lambda { "glark".getbyte }.should raise_error(ArgumentError)
lambda { "food".getbyte(0,0) }.should raise_error(ArgumentError)
end
it "raises a TypeError unless its argument can be coerced into an Integer" do
lambda { "a".getbyte('a') }.should raise_error(TypeError)
end
end
|
