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require 'time'
require "amq/protocol/table_value_decoder"
module AMQ
module Protocol
RSpec.describe TableValueDecoder do
it "is capable of decoding basic arrays TableValueEncoder encodes" do
input1 = [1, 2, 3]
value, _offset = described_class.decode_array(TableValueEncoder.encode(input1), 1)
expect(value.size).to eq(3)
expect(value.first).to eq(1)
expect(value).to eq(input1)
input2 = ["one", 2, "three"]
value, _offset = described_class.decode_array(TableValueEncoder.encode(input2), 1)
expect(value.size).to eq(3)
expect(value.first).to eq("one")
expect(value).to eq(input2)
input3 = ["one", 2, "three", 4.0, 5000000.0]
value, _offset = described_class.decode_array(TableValueEncoder.encode(input3), 1)
expect(value.size).to eq(5)
expect(value.last).to eq(5000000.0)
expect(value).to eq(input3)
end
it "is capable of decoding arrays TableValueEncoder encodes" do
input1 = [{ "one" => 2 }, 3]
data1 = TableValueEncoder.encode(input1)
# puts(TableValueEncoder.encode({ "one" => 2 }).inspect)
# puts(TableValueEncoder.encode(input1).inspect)
value, _offset = described_class.decode_array(data1, 1)
expect(value.size).to eq(2)
expect(value.first).to eq(Hash["one" => 2])
expect(value).to eq(input1)
input2 = ["one", 2, { "three" => { "four" => 5.0 } }]
value, _offset = described_class.decode_array(TableValueEncoder.encode(input2), 1)
expect(value.size).to eq(3)
expect(value.last["three"]["four"]).to eq(5.0)
expect(value).to eq(input2)
end
it "is capable of decoding 32 bit float values" do
input = Float32Bit.new(10.0)
data = TableValueEncoder.encode(input)
value = described_class.decode_32bit_float(data, 1)[0]
expect(value).to eq(10.0)
end
context "8bit/byte decoding" do
let(:examples) {
{
0x00 => "\x00",
0x01 => "\x01",
0x10 => "\x10",
255 => "\xFF" # not -1
}
}
it "is capable of decoding byte values" do
examples.each do |key, value|
expect(described_class.decode_byte(value, 0).first).to eq(key)
end
end
end
describe ".decode_string" do
it "decodes string values" do
# 4 bytes length + string content
data = "\x00\x00\x00\x05hello"
value, offset = described_class.decode_string(data, 0)
expect(value).to eq("hello")
expect(offset).to eq(9)
end
end
describe ".decode_integer" do
it "decodes 32-bit unsigned integers" do
data = "\x00\x00\x00\x0A"
value, offset = described_class.decode_integer(data, 0)
expect(value).to eq(10)
expect(offset).to eq(4)
end
end
describe ".decode_long" do
it "decodes 64-bit signed integers" do
data = "\x00\x00\x00\x00\x00\x00\x00\x0A"
value, offset = described_class.decode_long(data, 0)
expect(value).to eq(10)
expect(offset).to eq(8)
end
end
describe ".decode_time" do
it "decodes timestamp values" do
timestamp = Time.now.to_i
data = [timestamp].pack('Q>')
value, offset = described_class.decode_time(data, 0)
expect(value.to_i).to eq(timestamp)
expect(offset).to eq(8)
end
end
describe ".decode_boolean" do
it "decodes true" do
value, offset = described_class.decode_boolean("\x01", 0)
expect(value).to eq(true)
expect(offset).to eq(1)
end
it "decodes false" do
value, offset = described_class.decode_boolean("\x00", 0)
expect(value).to eq(false)
expect(offset).to eq(1)
end
end
describe ".decode_64bit_float" do
it "decodes 64-bit floats" do
data = [3.14159].pack('G')
value, offset = described_class.decode_64bit_float(data, 0)
expect(value).to be_within(0.00001).of(3.14159)
expect(offset).to eq(8)
end
end
describe ".decode_value_type" do
it "returns the type byte and incremented offset" do
data = "Shello"
type, offset = described_class.decode_value_type(data, 0)
expect(type).to eq("S")
expect(offset).to eq(1)
end
end
describe ".decode_short" do
it "decodes 16-bit signed integers" do
data = "\x06\x8D"
value, offset = described_class.decode_short(data, 0)
expect(value).to eq(1677)
expect(offset).to eq(2)
end
end
describe ".decode_big_decimal" do
it "decodes BigDecimal values" do
# Scale 2, raw value 100 = 1.00
data = "\x02\x00\x00\x00\x64"
value, offset = described_class.decode_big_decimal(data, 0)
expect(value).to be_a(BigDecimal)
expect(offset).to eq(5)
end
end
describe ".decode_hash" do
it "decodes nested hash values" do
encoded = AMQ::Protocol::Table.encode({"nested" => "value"})
value, _offset = described_class.decode_hash(encoded, 0)
expect(value).to eq({"nested" => "value"})
end
end
end
end
end
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