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describe :io_buffer_null_and_empty, shared: true do
it "is false for a buffer with size > 0" do
@buffer = IO::Buffer.new(1)
@buffer.send(@method).should be_false
end
it "is false for a slice with length > 0" do
@buffer = IO::Buffer.new(4)
@buffer.slice(1, 2).send(@method).should be_false
end
it "is false for a file-mapped buffer" do
File.open(__FILE__, "rb") do |file|
@buffer = IO::Buffer.map(file, nil, 0, IO::Buffer::READONLY)
@buffer.send(@method).should be_false
end
end
it "is false for a non-empty String-backed buffer created with .for" do
@buffer = IO::Buffer.for("test")
@buffer.send(@method).should be_false
end
ruby_version_is "3.3" do
it "is false for a non-empty String-backed buffer created with .string" do
IO::Buffer.string(4) do |buffer|
buffer.send(@method).should be_false
end
end
end
it "is true for a 0-sized buffer" do
@buffer = IO::Buffer.new(0)
@buffer.send(@method).should be_true
end
it "is true for a slice of a 0-sized buffer" do
@buffer = IO::Buffer.new(0)
@buffer.slice(0, 0).send(@method).should be_true
end
it "is true for a freed buffer" do
@buffer = IO::Buffer.new(1)
@buffer.free
@buffer.send(@method).should be_true
end
it "is true for a buffer resized to 0" do
@buffer = IO::Buffer.new(1)
@buffer.resize(0)
@buffer.send(@method).should be_true
end
it "is true for a buffer whose memory was transferred" do
buffer = IO::Buffer.new(1)
@buffer = buffer.transfer
buffer.send(@method).should be_true
end
end
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