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require 'spec_helper'

describe Thrift::Bytes do
  if RUBY_VERSION >= '1.9'
    describe '.empty_byte_buffer' do
      it 'should create an empty buffer' do
        b = Thrift::Bytes.empty_byte_buffer
        b.length.should == 0
        b.encoding.should == Encoding::BINARY
      end

      it 'should create an empty buffer of given size' do
        b = Thrift::Bytes.empty_byte_buffer 2
        b.length.should == 2
        b.getbyte(0).should == 0
        b.getbyte(1).should == 0
        b.encoding.should == Encoding::BINARY
      end
    end

    describe '.force_binary_encoding' do
      it 'should change encoding' do
        e = 'STRING'.encode('UTF-8')
        e.encoding.should_not == Encoding::BINARY
        a = Thrift::Bytes.force_binary_encoding e
        a.encoding.should == Encoding::BINARY
      end
    end

    describe '.get_string_byte' do
      it 'should get the byte at index' do
        s = "\x41\x42"
        Thrift::Bytes.get_string_byte(s, 0).should == 0x41
        Thrift::Bytes.get_string_byte(s, 1).should == 0x42
      end
    end

    describe '.set_string_byte' do
      it 'should set byte value at index' do
        s = "\x41\x42"
        Thrift::Bytes.set_string_byte(s, 0, 0x43)
        s.getbyte(0).should == 0x43
        s.should == 'CB'
      end
    end

    describe '.convert_to_utf8_byte_buffer' do
      it 'should convert UTF-8 String to byte buffer' do
        e = "\u20AC".encode('UTF-8') # a string with euro sign character U+20AC
        e.length.should == 1

        a = Thrift::Bytes.convert_to_utf8_byte_buffer e
        a.encoding.should == Encoding::BINARY
        a.length.should == 3
        a.unpack('C*').should == [0xE2, 0x82, 0xAC]
      end

      it 'should convert ISO-8859-15 String to UTF-8 byte buffer' do
        # Assumptions
        e = "\u20AC".encode('ISO-8859-15') # a string with euro sign character U+20AC, then converted to ISO-8859-15
        e.length.should == 1
        e.unpack('C*').should == [0xA4] # euro sign is a different code point in ISO-8859-15

        a = Thrift::Bytes.convert_to_utf8_byte_buffer e
        a.encoding.should == Encoding::BINARY
        a.length.should == 3
        a.unpack('C*').should == [0xE2, 0x82, 0xAC]
      end
    end

    describe '.convert_to_string' do
      it 'should convert UTF-8 byte buffer to a UTF-8 String' do
        e = [0xE2, 0x82, 0xAC].pack("C*")
        e.encoding.should == Encoding::BINARY
        a = Thrift::Bytes.convert_to_string e
        a.encoding.should == Encoding::UTF_8
        a.should == "\u20AC"
      end
    end

  else # RUBY_VERSION
    describe '.empty_byte_buffer' do
      it 'should create an empty buffer' do
        b = Thrift::Bytes.empty_byte_buffer
        b.length.should == 0
      end

      it 'should create an empty buffer of given size' do
        b = Thrift::Bytes.empty_byte_buffer 2
        b.length.should == 2
        b[0].should == 0
        b[1].should == 0
      end
    end

    describe '.force_binary_encoding' do
      it 'should be a no-op' do
        e = 'STRING'
        a = Thrift::Bytes.force_binary_encoding e
        a.should == e
        a.should be(e)
      end
    end

    describe '.get_string_byte' do
      it 'should get the byte at index' do
        s = "\x41\x42"
        Thrift::Bytes.get_string_byte(s, 0).should == 0x41
        Thrift::Bytes.get_string_byte(s, 1).should == 0x42
      end
    end

    describe '.set_string_byte' do
      it 'should set byte value at index' do
        s = "\x41\x42"
        Thrift::Bytes.set_string_byte(s, 0, 0x43)
        s[0].should == 0x43
        s.should == 'CB'
      end
    end

    describe '.convert_to_utf8_byte_buffer' do
      it 'should be a no-op' do
        e = 'STRING'
        a = Thrift::Bytes.convert_to_utf8_byte_buffer e
        a.should == e
        a.should be(e)
      end
    end

    describe '.convert_to_string' do
      it 'should be a no-op' do
        e = 'STRING'
        a = Thrift::Bytes.convert_to_string e
        a.should == e
        a.should be(e)
      end
    end
  end
end