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# -*- encoding: utf-8 -*-
describe :io_chars, shared: true do
before :each do
@io = IOSpecs.io_fixture "lines.txt"
ScratchPad.record []
end
after :each do
@io.close unless @io.closed?
end
it "yields each character" do
@io.readline.should == "Voici la ligne une.\n"
count = 0
@io.send(@method) do |c|
ScratchPad << c
break if 4 < count += 1
end
ScratchPad.recorded.should == ["Q", "u", "i", " ", "è"]
end
describe "when no block is given" do
it "returns an Enumerator" do
enum = @io.send(@method)
enum.should be_an_instance_of(Enumerator)
enum.first(5).should == ["V", "o", "i", "c", "i"]
end
describe "returned Enumerator" do
describe "size" do
it "should return nil" do
@io.send(@method).size.should == nil
end
end
end
end
it "returns itself" do
@io.send(@method) { |c| }.should equal(@io)
end
it "returns an enumerator for a closed stream" do
IOSpecs.closed_io.send(@method).should be_an_instance_of(Enumerator)
end
it "raises an IOError when an enumerator created on a closed stream is accessed" do
lambda { IOSpecs.closed_io.send(@method).first }.should raise_error(IOError)
end
it "raises IOError on closed stream" do
lambda { IOSpecs.closed_io.send(@method) {} }.should raise_error(IOError)
end
end
describe :io_chars_empty, shared: true do
before :each do
@name = tmp("io_each_char")
@io = new_io @name, "w+:utf-8"
ScratchPad.record []
end
after :each do
@io.close unless @io.closed?
rm_r @name
end
it "does not yield any characters on an empty stream" do
@io.send(@method) { |c| ScratchPad << c }
ScratchPad.recorded.should == []
end
end
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