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ruby--ruby/spec/ruby/library/stringio/sysread_spec.rb

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require_relative '../../spec_helper'
require "stringio"
require_relative 'shared/read'
describe "StringIO#sysread when passed length, buffer" do
it_behaves_like :stringio_read, :sysread
end
describe "StringIO#sysread when passed [length]" do
it_behaves_like :stringio_read_length, :sysread
end
describe "StringIO#sysread when passed no arguments" do
it_behaves_like :stringio_read_no_arguments, :sysread
it "returns an empty String if at EOF" do
@io.sysread.should == "example"
@io.sysread.should == ""
end
end
describe "StringIO#sysread when self is not readable" do
it_behaves_like :stringio_read_not_readable, :sysread
end
describe "StringIO#sysread when passed nil" do
it_behaves_like :stringio_read_nil, :sysread
it "returns an empty String if at EOF" do
@io.sysread(nil).should == "example"
@io.sysread(nil).should == ""
end
end
describe "StringIO#sysread when passed [length]" do
before :each do
@io = StringIO.new("example")
end
it "raises an EOFError when self's position is at the end" do
@io.pos = 7
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-> { @io.sysread(10) }.should raise_error(EOFError)
end
it "returns an empty String when length is 0" do
@io.sysread(0).should == ""
end
end