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# -*- encoding: binary -*-
require_relative '../../../spec_helper'
require_relative '../fixtures/classes'
require_relative 'shared/basic'
require_relative 'shared/numeric_basic'
describe :array_pack_8bit, shared: true do
it "encodes the least significant eight bits of a positive number" do
[ [[49], "1"],
[[0b11111111], "\xFF"],
[[0b100000000], "\x00"],
[[0b100000001], "\x01"]
].should be_computed_by(:pack, pack_format)
end
it "encodes the least significant eight bits of a negative number" do
[ [[-1], "\xFF"],
[[-0b10000000], "\x80"],
[[-0b11111111], "\x01"],
[[-0b100000000], "\x00"],
[[-0b100000001], "\xFF"]
].should be_computed_by(:pack, pack_format)
end
it "encodes a Float truncated as an Integer" do
[ [[5.2], "\x05"],
[[5.8], "\x05"]
].should be_computed_by(:pack, pack_format)
end
it "calls #to_int to convert the pack argument to an Integer" do
obj = mock('to_int')
obj.should_receive(:to_int).and_return(5)
[obj].pack(pack_format).should == "\x05"
end
it "encodes the number of array elements specified by the count modifier" do
[ [[1, 2, 3], pack_format(3), "\x01\x02\x03"],
[[1, 2, 3], pack_format(2) + pack_format(1), "\x01\x02\x03"]
].should be_computed_by(:pack)
end
it "encodes all remaining elements when passed the '*' modifier" do
[1, 2, 3, 4, 5].pack(pack_format('*')).should == "\x01\x02\x03\x04\x05"
end
it "ignores NULL bytes between directives" do
[1, 2, 3].pack(pack_format("\000", 2)).should == "\x01\x02"
end
it "ignores spaces between directives" do
[1, 2, 3].pack(pack_format(' ', 2)).should == "\x01\x02"
end
end
describe "Array#pack with format 'C'" do
it_behaves_like :array_pack_basic, 'C'
it_behaves_like :array_pack_basic_non_float, 'C'
it_behaves_like :array_pack_8bit, 'C'
it_behaves_like :array_pack_arguments, 'C'
it_behaves_like :array_pack_numeric_basic, 'C'
it_behaves_like :array_pack_integer, 'C'
it_behaves_like :array_pack_no_platform, 'C'
end
describe "Array#pack with format 'c'" do
it_behaves_like :array_pack_basic, 'c'
it_behaves_like :array_pack_basic_non_float, 'c'
it_behaves_like :array_pack_8bit, 'c'
it_behaves_like :array_pack_arguments, 'c'
it_behaves_like :array_pack_numeric_basic, 'c'
it_behaves_like :array_pack_integer, 'c'
it_behaves_like :array_pack_no_platform, 'c'
end
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