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require File.expand_path('../../../spec_helper', __FILE__)
require File.expand_path('../fixtures/classes.rb', __FILE__)
describe "String#each_byte" do
it "passes each byte in self to the given block" do
a = []
"hello\x00".each_byte { |c| a << c }
a.should == [104, 101, 108, 108, 111, 0]
end
it "keeps iterating from the old position (to new string end) when self changes" do
r = ""
s = "hello world"
s.each_byte do |c|
r << c
s.insert(0, "<>") if r.size < 3
end
r.should == "h><>hello world"
r = ""
s = "hello world"
s.each_byte { |c| s.slice!(-1); r << c }
r.should == "hello "
r = ""
s = "hello world"
s.each_byte { |c| s.slice!(0); r << c }
r.should == "hlowrd"
r = ""
s = "hello world"
s.each_byte { |c| s.slice!(0..-1); r << c }
r.should == "h"
end
it "returns self" do
s = "hello"
(s.each_byte {}).should equal(s)
end
describe "when no block is given" do
it "returns an enumerator" do
enum = "hello".each_byte
enum.should be_an_instance_of(Enumerator)
enum.to_a.should == [104, 101, 108, 108, 111]
end
describe "returned enumerator" do
describe "size" do
it "should return the bytesize of the string" do
str = "hello"
str.each_byte.size.should == str.bytesize
str = "ola"
str.each_byte.size.should == str.bytesize
str = "\303\207\342\210\202\303\251\306\222g"
str.each_byte.size.should == str.bytesize
end
end
end
end
end
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