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Size: 1.87 KB
Versions: 90
Compression:
Stored size: 1.87 KB
Contents
# -*- encoding: utf-8 -*-
require 'test_helper'
require 'hexapdf/utils/bit_stream'
describe HexaPDF::Utils::BitStreamReader do
before do
@reader = HexaPDF::Utils::BitStreamReader.new
end
it "allows appending data" do
assert_equal(0, @reader.remaining_bits)
@reader << "data"
assert_equal(32, @reader.remaining_bits)
@reader << "some"
assert_equal(64, @reader.remaining_bits)
@reader.read(4)
assert_equal(60, @reader.remaining_bits)
@reader << "more"
assert_equal(92, @reader.remaining_bits)
end
it "allows checking whether a certain number of bits can be read" do
refute(@reader.read?(1))
@reader << "data"
assert(@reader.read?(1))
assert(@reader.read?(32))
refute(@reader.read?(33))
end
describe "read" do
it "allows reading any number of bits" do
@reader << "\xaa" * 8 # 10101010 * 8
assert_equal(1, @reader.read(1))
assert_equal(0, @reader.read(1))
assert_equal(2, @reader.read(2))
assert_equal(10, @reader.read(4))
assert_equal(5, @reader.read(3))
assert_equal((0b01010 << 8) | 0xaa, @reader.read(13))
assert_equal(5, @reader.read(3))
assert_equal((0b01010 << 7) | (0xaa >> 1), @reader.read(12))
assert_equal(2, @reader.read(3))
end
it "allows reading many bits" do
@reader << "\x80" << "\x00" * 20
assert_equal(2**127, @reader.read(128))
end
it "returns nil if enough bits are available" do
assert_nil(@reader.read(1))
end
end
end
describe HexaPDF::Utils::BitStreamWriter do
before do
@writer = HexaPDF::Utils::BitStreamWriter.new
end
it "allows writing any number of bits" do
result = @writer.write(1, 1)
result << @writer.write(0b101, 3)
result << @writer.write(0xff, 8)
result << @writer.write(0x5ddd, 15)
result << @writer.finalize
assert_equal("\xdf\xfb\xbb\xa0".b, result)
end
end
Version data entries
90 entries across 90 versions & 1 rubygems