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require_relative '../../../spec_helper'
describe "IO::Buffer#external?" do
after :each do
@buffer&.free
@buffer = nil
end
context "with a buffer created with .new" do
it "is false for an internal buffer" do
@buffer = IO::Buffer.new(4)
@buffer.external?.should be_false
end
it "is false for a mapped buffer" do
@buffer = IO::Buffer.new(4, IO::Buffer::MAPPED)
@buffer.external?.should be_false
end
end
context "with a file-backed buffer created with .map" do
it "is true for a regular mapping" do
File.open(__FILE__, "r") do |file|
@buffer = IO::Buffer.map(file, nil, 0, IO::Buffer::READONLY)
@buffer.external?.should be_true
end
end
ruby_version_is "3.3" do
it "is false for a private mapping" do
File.open(__FILE__, "r") do |file|
@buffer = IO::Buffer.map(file, nil, 0, IO::Buffer::READONLY | IO::Buffer::PRIVATE)
@buffer.external?.should be_false
end
end
end
end
context "with a String-backed buffer created with .for" do
it "is true for a buffer created without a block" do
@buffer = IO::Buffer.for("test")
@buffer.external?.should be_true
end
it "is true for a buffer created with a block" do
IO::Buffer.for(+"test") do |buffer|
buffer.external?.should be_true
end
end
end
ruby_version_is "3.3" do
context "with a String-backed buffer created with .string" do
it "is true" do
IO::Buffer.string(4) do |buffer|
buffer.external?.should be_true
end
end
end
end
# Always false for slices
context "with a slice of a buffer" do
context "created with .new" do
it "is false when slicing an internal buffer" do
@buffer = IO::Buffer.new(4)
@buffer.slice.external?.should be_false
end
it "is false when slicing a mapped buffer" do
@buffer = IO::Buffer.new(4, IO::Buffer::MAPPED)
@buffer.slice.external?.should be_false
end
end
context "created with .map" do
it "is false" do
File.open(__FILE__, "r") do |file|
@buffer = IO::Buffer.map(file, nil, 0, IO::Buffer::READONLY)
@buffer.slice.external?.should be_false
end
end
end
context "created with .for" do
it "is false when slicing a buffer created without a block" do
@buffer = IO::Buffer.for("test")
@buffer.slice.external?.should be_false
end
it "is false when slicing a buffer created with a block" do
IO::Buffer.for(+"test") do |buffer|
buffer.slice.external?.should be_false
end
end
end
ruby_version_is "3.3" do
context "created with .string" do
it "is false" do
IO::Buffer.string(4) do |buffer|
buffer.slice.external?.should be_false
end
end
end
end
end
end
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