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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
ruby_version_is "1.8.7" do
it "returns an enumerator when no block given" do
enum = "hello".each_byte
enum.should be_an_instance_of(enumerator_class)
enum.to_a.should == [104, 101, 108, 108, 111]
end
end
end
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