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# -*- encoding: utf-8 -*-
require File.expand_path('../../../spec_helper', __FILE__)
require File.expand_path('../fixtures/classes', __FILE__)
describe "IO.binread" do
before :each do
@internal = Encoding.default_internal
@fname = tmp('io_read.txt')
@contents = "1234567890"
touch(@fname) { |f| f.write @contents }
end
after :each do
rm_r @fname
Encoding.default_internal = @internal
end
it "reads the contents of a file" do
IO.binread(@fname).should == @contents
end
it "reads the contents of a file up to a certain size when specified" do
IO.binread(@fname, 5).should == @contents.slice(0..4)
end
it "reads the contents of a file from an offset of a specific size when specified" do
IO.binread(@fname, 5, 3).should == @contents.slice(3, 5)
end
it "returns a String in ASCII-8BIT encoding" do
IO.binread(@fname).encoding.should == Encoding::ASCII_8BIT
end
it "returns a String in ASCII-8BIT encoding regardless of Encoding.default_internal" do
Encoding.default_internal = Encoding::EUC_JP
IO.binread(@fname).encoding.should == Encoding::ASCII_8BIT
end
it "raises an ArgumentError when not passed a valid length" do
lambda { IO.binread @fname, -1 }.should raise_error(ArgumentError)
end
ruby_version_is "2.3" do # MRI leaks the fd on older versions
it "raises an Errno::EINVAL when not passed a valid offset" do
lambda { IO.binread @fname, 0, -1 }.should raise_error(Errno::EINVAL)
end
end
end
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