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# -*- encoding: ascii-8bit -*-
require_relative '../../../spec_helper'
require_relative '../fixtures/classes'
require_relative 'shared/basic'
describe :string_unpack_8bit, shared: true do
it "decodes one byte for a single format character" do
"abc".unpack(unpack_format()).should == [97]
end
it "decodes two bytes for two format characters" do
"abc".unpack(unpack_format(nil, 2)).should == [97, 98]
end
it "decodes the number of bytes requested by the count modifier" do
"abc".unpack(unpack_format(2)).should == [97, 98]
end
it "decodes the remaining bytes when passed the '*' modifier" do
"abc".unpack(unpack_format('*')).should == [97, 98, 99]
end
it "decodes the remaining bytes when passed the '*' modifer after another directive" do
"abc".unpack(unpack_format()+unpack_format('*')).should == [97, 98, 99]
end
it "decodes zero bytes when no bytes remain and the '*' modifier is passed" do
"abc".unpack(unpack_format('*', 2)).should == [97, 98, 99]
end
it "adds nil for each element requested beyond the end of the String" do
[ ["", [nil, nil, nil]],
["a", [97, nil, nil]],
["ab", [97, 98, nil]]
].should be_computed_by(:unpack, unpack_format(3))
end
it "ignores NULL bytes between directives" do
"abc".unpack(unpack_format("\000", 2)).should == [97, 98]
end
it "ignores spaces between directives" do
"abc".unpack(unpack_format(' ', 2)).should == [97, 98]
end
end
describe "String#unpack with format 'C'" do
it_behaves_like :string_unpack_basic, 'C'
it_behaves_like :string_unpack_8bit, 'C'
it "decodes a byte with most significant bit set as a positive number" do
"\xff\x80\x82".unpack('C*').should == [255, 128, 130]
end
end
describe "String#unpack with format 'c'" do
it_behaves_like :string_unpack_basic, 'c'
it_behaves_like :string_unpack_8bit, 'c'
it "decodes a byte with most significant bit set as a negative number" do
"\xff\x80\x82".unpack('c*').should == [-1, -128, -126]
end
end
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