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# -*- encoding: utf-8 -*-
require File.expand_path('../../fixtures/classes', __FILE__)
describe :io_codepoints, :shared => true do
before(:each) do
@io = IOSpecs.io_fixture "lines.txt"
@enum = @io.send(@method)
end
after(:each) do
@io.close
end
it "returns an Enumerator when passed no block" do
@enum.should be_an_instance_of(enumerator_class)
end
it "yields each codepoint" do
@enum.first(25).should == [
86, 111, 105, 99, 105, 32, 108, 97, 32, 108, 105, 103, 110,
101, 32, 117, 110, 101, 46, 10, 81, 117, 105, 32, 232
]
end
it "yields each codepoint starting from the current position" do
@io.pos = 130
@enum.to_a.should == [101, 32, 115, 105, 120, 46, 10]
end
it "raises an error if reading invalid sequence" do
@io.pos = 60 # inside of a multibyte sequence
lambda { @enum.first }.should raise_error(ArgumentError)
end
it "does not change $_" do
$_ = "test"
@enum.to_a
$_.should == "test"
end
it "raises an IOError when self is not readable" do
lambda { IOSpecs.closed_io.send(@method).to_a }.should raise_error(IOError)
end
end
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