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require_relative '../../../spec_helper'
describe "IO::Buffer#shared?" do
after :each do
@buffer&.free
@buffer = nil
end
it "is true for a buffer created with SHARED flag" do
@buffer = IO::Buffer.new(12, IO::Buffer::INTERNAL | IO::Buffer::SHARED)
@buffer.shared?.should be_true
end
it "is true for a non-private buffer created with .map" do
path = tmp("read_text.txt")
File.copy_stream(fixture(__dir__, "read_text.txt"), path)
file = File.open(path, "r+")
@buffer = IO::Buffer.map(file)
@buffer.shared?.should be_true
ensure
@buffer.free
file.close
File.unlink(path)
end
it "is false for an unshared buffer" do
@buffer = IO::Buffer.new(12)
@buffer.shared?.should be_false
end
it "is false for a null buffer" do
@buffer = IO::Buffer.new(0)
@buffer.shared?.should be_false
end
end
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