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require File.expand_path('../../../spec_helper', __FILE__)
require File.expand_path('../fixtures/classes', __FILE__)
describe "IO#each_byte" do
before :each do
@io = IOSpecs.io_fixture "lines.txt"
ScratchPad.record []
end
after :each do
@io.close unless @io.closed?
end
it "raises IOError on closed stream" do
# each_byte must have a block in order to raise the Error.
# MRI 1.8.7 returns enumerator if block is not provided.
# See [ruby-core:16557].
lambda { IOSpecs.closed_io.each_byte {} }.should raise_error(IOError)
end
it "yields each byte" do
count = 0
@io.each_byte do |byte|
ScratchPad << byte
break if 4 < count += 1
end
ScratchPad.recorded.should == [86, 111, 105, 99, 105]
end
ruby_version_is "" ... "1.8.7" do
it "yields a LocalJumpError when passed no block" do
lambda { @io.each_byte }.should raise_error(LocalJumpError)
end
end
ruby_version_is "1.8.7" do
it "returns an Enumerator when passed no block" do
enum = @io.each_byte
enum.should be_an_instance_of(enumerator_class)
enum.first(5).should == [86, 111, 105, 99, 105]
end
end
end
describe "IO#each_byte" do
before :each do
@io = IOSpecs.io_fixture "empty.txt"
end
after :each do
@io.close unless @io.closed?
end
it "returns self on an empty stream" do
@io.each_byte { |b| }.should equal(@io)
end
end
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