# -*- coding: utf-8 -*-
require File.expand_path(File.dirname(__FILE__) + '/../spec_helper')

def bytes_to_binary_string( bytes, claimed_encoding = nil )
    claimed_encoding ||= 'ASCII-8BIT'
    bytes_string = bytes.pack('c*')
    if String.method_defined?(:force_encoding)
        bytes_string.force_encoding claimed_encoding
    end
    bytes_string
end

random_string = bytes_to_binary_string [ 0x0f, 0x58, 0x1c, 0x8f, 0xa4, 0xcf,
                                         0xf6, 0x8c, 0x9d, 0xa7, 0x06, 0xd9,
                                         0xf7, 0x90, 0x6c, 0x6f]

windows_1252_string = bytes_to_binary_string [ 0x44, 0x41, 0x53, 0x48, 0x20,
                                               0x96, 0x20, 0x44, 0x41, 0x53,
                                               0x48 ]

# It's a shame this example is so long, but if we don't take enough it
# gets misinterpreted as Shift_JIS

gb_18030_bytes = [ 0xb9, 0xf3, 0xb9, 0xab, 0xcb, 0xbe, 0xb8, 0xba, 0xd4, 0xf0,
                   0xc8, 0xcb, 0x28, 0xbe, 0xad, 0xc0, 0xed, 0x2f, 0xb2, 0xc6,
                   0xce, 0xf1, 0x29, 0xc4, 0xfa, 0xba, 0xc3, 0xa3, 0xba, 0x0d,
                   0x0a, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
                   0x20, 0x20, 0x20, 0xb1, 0xbe, 0xb9, 0xab, 0xcb, 0xbe, 0xd4,
                   0xda, 0x31, 0x39, 0x39, 0x37, 0xc4, 0xea, 0xb3, 0xc9, 0xc1,
                   0xa2, 0xb9, 0xfa, 0xbc, 0xd2, 0xb9, 0xa4, 0xc9, 0xcc, 0xd7,
                   0xa2, 0xb2, 0xe1, 0x2e, 0xca, 0xb5, 0xc1, 0xa6, 0xd0, 0xdb,
                   0xba, 0xf1, 0xa1, 0xa3, 0xd3, 0xd0, 0xb6, 0xc0, 0xc1, 0xa2,
                   0xcb, 0xb0, 0xce, 0xf1, 0x0d, 0x0a, 0x20, 0x20, 0x20, 0x20,
                   0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0xd7, 0xa8, 0xd2, 0xb5,
                   0xc8, 0xcb, 0xd4, 0xb1, 0x3b, 0xd4, 0xda, 0xc8, 0xab, 0xb9,
                   0xfa, 0xb8, 0xf7, 0xb3, 0xc7, 0xca, 0xd0, 0xc9, 0xe8, 0xc1,
                   0xa2, 0xb7, 0xd6, 0xb9, 0xab, 0xcb, 0xbe, 0xa3, 0xa8, 0xd5,
                   0xe3, 0xbd, 0xad, 0xa1, 0xa2, 0xc9, 0xcf, 0xba, 0xa3, 0xa1,
                   0xa2, 0xb9, 0xe3, 0xd6, 0xdd, 0xa1, 0xa2, 0xbd, 0xad, 0xcb,
                   0xd5, 0xb5, 0xc8, 0x0d, 0x0a, 0x20, 0x20, 0x20, 0x20, 0x20,
                   0x20, 0x20, 0x20, 0x20, 0x20, 0xb5, 0xd8, 0xb7, 0xbd, 0xa3,
                   0xa9, 0xd2, 0xf2, 0xbd, 0xf8, 0xcf, 0xee, 0xbd, 0xcf, 0xb6,
                   0xe0, 0xcf, 0xd6, 0xcd, 0xea, 0xb3, 0xc9, 0xb2, 0xbb, 0xc1,
                   0xcb, 0xc3, 0xbf, 0xd4, 0xc2, 0xcf, 0xfa, 0xca, 0xdb, 0xb6,
                   0xee, 0xb6, 0xc8, 0xa1, 0xa3, 0xc3, 0xbf, 0xd4, 0xc2, 0xd3,
                   0xd0, 0xd2, 0xbb, 0xb2, 0xbf, 0xb7, 0xd6, 0x0d, 0x0a, 0x20,
                   0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0xd4,
                   0xf6, 0xd6, 0xb5, 0xb6, 0x90, 0xa3, 0xa8, 0x36, 0x2d, 0x37,
                   0x25, 0xd7, 0xf3, 0xd3, 0xd2, 0x29, 0xba, 0xcd, 0xc6, 0xd5,
                   0xc6, 0xb1, 0xa3, 0xa8, 0x30, 0x2e, 0x35, 0x25, 0x2d, 0x32,
                   0x25, 0x20, 0xd7, 0xf3, 0xd3, 0xd2, 0xa3, 0xa9, 0xd3, 0xc5,
                   0xbb, 0xdd, 0xb4, 0xfa, 0xbf, 0xaa, 0xbb, 0xf2, 0xba, 0xcf,
                   0xd7, 0xf7, 0xa3, 0xac, 0x0d, 0x0a, 0x20, 0x20, 0x20, 0x20,
                   0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0xb5, 0xe3, 0xca, 0xfd,
                   0xbd, 0xcf, 0xb5, 0xcd, 0xa1, 0xa3, 0xb4, 0xfa, 0xc0, 0xed,
                   0xb7, 0xb6, 0xce, 0xa7, 0xc8, 0xe7, 0xcf, 0xc2, 0xa3, 0xba,
                   0x0d, 0x0a ]

gb_18030_spam_string = bytes_to_binary_string gb_18030_bytes

describe "normalize_string_to_utf8" do

    describe "when passed uniterpretable character data" do

        it "should reject it as invalid" do

            expect {
                normalize_string_to_utf8 random_string
            }.to raise_error(EncodingNormalizationError)

            expect {
                normalize_string_to_utf8 random_string, 'UTF-8'
            }.to raise_error(EncodingNormalizationError)

        end
    end

    describe "when passed unlabelled Windows 1252 data" do

        it "should correctly convert it to UTF-8" do

            normalized = normalize_string_to_utf8 windows_1252_string

            normalized.should ==  "DASH – DASH"

        end

    end

    describe "when passed GB 18030 data" do

        it "should correctly convert it to UTF-8 if unlabelled" do

            normalized = normalize_string_to_utf8 gb_18030_spam_string

            normalized.should start_with("贵公司负责人")

        end

    end

end

describe "convert_string_to_utf8_or_binary" do

    describe "when passed uniterpretable character data" do

        it "should return it as a binary string" do

            converted = convert_string_to_utf8_or_binary random_string
            converted.should == random_string

            if String.method_defined?(:encode)
                converted.encoding.to_s.should == 'ASCII-8BIT'
            end

            converted = convert_string_to_utf8_or_binary random_string,'UTF-8'
            converted.should == random_string

            if String.method_defined?(:encode)
                converted.encoding.to_s.should == 'ASCII-8BIT'
            end

        end
    end

    describe "when passed unlabelled Windows 1252 data" do

        it "should correctly convert it to UTF-8" do

            converted = convert_string_to_utf8_or_binary windows_1252_string

            converted.should ==  "DASH – DASH"

            if String.method_defined?(:encode)
                converted.encoding.to_s.should == 'UTF-8'
            end
        end

    end

    describe "when passed GB 18030 data" do

        it "should correctly convert it to UTF-8 if unlabelled" do

            converted = convert_string_to_utf8_or_binary gb_18030_spam_string

            converted.should start_with("贵公司负责人")

            if String.method_defined?(:encode)
                converted.encoding.to_s.should == 'UTF-8'
            end
        end

    end

end