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require "spec"
describe Pointer::Appender do
it ".new" do
Pointer::Appender.new(Pointer(Void).null)
end
it "#<<" do
data = Slice(Int32).new(5)
appender = data.to_unsafe.appender
4.times do |i|
appender << (i + 1) * 2
end
data.should eq Slice[2, 4, 6, 8, 0]
end
it "#size" do
data = Slice(Int32).new(5)
appender = data.to_unsafe.appender
appender.size.should eq 0
4.times do |i|
appender << 0
appender.size.should eq i + 1
end
appender.size.should eq 4
end
it "#to_slice" do
data = Slice(Int32).new(5)
appender = data.to_unsafe.appender
appender.to_slice.should eq Slice(Int32).new(0)
appender.to_slice.to_unsafe.should eq data.to_unsafe
4.times do |i|
appender << (i + 1) * 2
appender.to_slice.should eq data[0, i + 1]
end
appender.to_slice.should eq Slice[2, 4, 6, 8]
appender.to_slice.to_unsafe.should eq data.to_unsafe
end
end
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