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require_relative '../../spec_helper'
describe "IO#set_encoding_by_bom" do
before :each do
@name = tmp('io_set_encoding_by_bom.txt')
touch(@name)
@io = new_io(@name, 'rb')
end
after :each do
@io.close unless @io.closed?
rm_r @name
end
it "returns nil if not readable" do
not_readable_io = new_io(@name, 'wb')
not_readable_io.set_encoding_by_bom.should be_nil
not_readable_io.external_encoding.should == Encoding::ASCII_8BIT
ensure
not_readable_io.close
end
it "returns the result encoding if found BOM UTF-8 sequence" do
File.binwrite(@name, "\u{FEFF}")
@io.set_encoding_by_bom.should == Encoding::UTF_8
@io.external_encoding.should == Encoding::UTF_8
@io.read.b.should == "".b
@io.rewind
@io.set_encoding(Encoding::ASCII_8BIT)
File.binwrite(@name, "\u{FEFF}abc")
@io.set_encoding_by_bom.should == Encoding::UTF_8
@io.external_encoding.should == Encoding::UTF_8
@io.read.b.should == "abc".b
end
it "returns the result encoding if found BOM UTF_16LE sequence" do
File.binwrite(@name, "\xFF\xFE")
@io.set_encoding_by_bom.should == Encoding::UTF_16LE
@io.external_encoding.should == Encoding::UTF_16LE
@io.read.b.should == "".b
@io.rewind
@io.set_encoding(Encoding::ASCII_8BIT)
File.binwrite(@name, "\xFF\xFEabc")
@io.set_encoding_by_bom.should == Encoding::UTF_16LE
@io.external_encoding.should == Encoding::UTF_16LE
@io.read.b.should == "abc".b
end
it "returns the result encoding if found BOM UTF_16BE sequence" do
File.binwrite(@name, "\xFE\xFF")
@io.set_encoding_by_bom.should == Encoding::UTF_16BE
@io.external_encoding.should == Encoding::UTF_16BE
@io.read.b.should == "".b
@io.rewind
@io.set_encoding(Encoding::ASCII_8BIT)
File.binwrite(@name, "\xFE\xFFabc")
@io.set_encoding_by_bom.should == Encoding::UTF_16BE
@io.external_encoding.should == Encoding::UTF_16BE
@io.read.b.should == "abc".b
end
it "returns the result encoding if found BOM UTF_32LE sequence" do
File.binwrite(@name, "\xFF\xFE\x00\x00")
@io.set_encoding_by_bom.should == Encoding::UTF_32LE
@io.external_encoding.should == Encoding::UTF_32LE
@io.read.b.should == "".b
@io.rewind
@io.set_encoding(Encoding::ASCII_8BIT)
File.binwrite(@name, "\xFF\xFE\x00\x00abc")
@io.set_encoding_by_bom.should == Encoding::UTF_32LE
@io.external_encoding.should == Encoding::UTF_32LE
@io.read.b.should == "abc".b
end
it "returns the result encoding if found BOM UTF_32BE sequence" do
File.binwrite(@name, "\x00\x00\xFE\xFF")
@io.set_encoding_by_bom.should == Encoding::UTF_32BE
@io.external_encoding.should == Encoding::UTF_32BE
@io.read.b.should == "".b
@io.rewind
@io.set_encoding(Encoding::ASCII_8BIT)
File.binwrite(@name, "\x00\x00\xFE\xFFabc")
@io.set_encoding_by_bom.should == Encoding::UTF_32BE
@io.external_encoding.should == Encoding::UTF_32BE
@io.read.b.should == "abc".b
end
it "returns nil if io is empty" do
@io.set_encoding_by_bom.should be_nil
@io.external_encoding.should == Encoding::ASCII_8BIT
end
it "returns nil if UTF-8 BOM sequence is incomplete" do
File.write(@name, "\xEF")
@io.set_encoding_by_bom.should == nil
@io.external_encoding.should == Encoding::ASCII_8BIT
@io.read.b.should == "\xEF".b
@io.rewind
File.write(@name, "\xEFa")
@io.set_encoding_by_bom.should == nil
@io.external_encoding.should == Encoding::ASCII_8BIT
@io.read.b.should == "\xEFa".b
@io.rewind
File.write(@name, "\xEF\xBB")
@io.set_encoding_by_bom.should == nil
@io.external_encoding.should == Encoding::ASCII_8BIT
@io.read.b.should == "\xEF\xBB".b
@io.rewind
File.write(@name, "\xEF\xBBa")
@io.set_encoding_by_bom.should == nil
@io.external_encoding.should == Encoding::ASCII_8BIT
@io.read.b.should == "\xEF\xBBa".b
end
it "returns nil if UTF-16BE BOM sequence is incomplete" do
File.write(@name, "\xFE")
@io.set_encoding_by_bom.should == nil
@io.external_encoding.should == Encoding::ASCII_8BIT
@io.read.b.should == "\xFE".b
@io.rewind
File.write(@name, "\xFEa")
@io.set_encoding_by_bom.should == nil
@io.external_encoding.should == Encoding::ASCII_8BIT
@io.read.b.should == "\xFEa".b
end
it "returns nil if UTF-16LE/UTF-32LE BOM sequence is incomplete" do
File.write(@name, "\xFF")
@io.set_encoding_by_bom.should == nil
@io.external_encoding.should == Encoding::ASCII_8BIT
@io.read.b.should == "\xFF".b
@io.rewind
File.write(@name, "\xFFa")
@io.set_encoding_by_bom.should == nil
@io.external_encoding.should == Encoding::ASCII_8BIT
@io.read.b.should == "\xFFa".b
end
it "returns UTF-16LE if UTF-32LE BOM sequence is incomplete" do
File.write(@name, "\xFF\xFE")
@io.set_encoding_by_bom.should == Encoding::UTF_16LE
@io.external_encoding.should == Encoding::UTF_16LE
@io.read.b.should == "".b
@io.rewind
@io.set_encoding(Encoding::ASCII_8BIT)
File.write(@name, "\xFF\xFE\x00")
@io.set_encoding_by_bom.should == Encoding::UTF_16LE
@io.external_encoding.should == Encoding::UTF_16LE
@io.read.b.should == "\x00".b
@io.rewind
@io.set_encoding(Encoding::ASCII_8BIT)
File.write(@name, "\xFF\xFE\x00a")
@io.set_encoding_by_bom.should == Encoding::UTF_16LE
@io.external_encoding.should == Encoding::UTF_16LE
@io.read.b.should == "\x00a".b
end
it "returns nil if UTF-32BE BOM sequence is incomplete" do
File.write(@name, "\x00")
@io.set_encoding_by_bom.should == nil
@io.external_encoding.should == Encoding::ASCII_8BIT
@io.read.b.should == "\x00".b
@io.rewind
File.write(@name, "\x00a")
@io.set_encoding_by_bom.should == nil
@io.external_encoding.should == Encoding::ASCII_8BIT
@io.read.b.should == "\x00a".b
@io.rewind
File.write(@name, "\x00\x00")
@io.set_encoding_by_bom.should == nil
@io.external_encoding.should == Encoding::ASCII_8BIT
@io.read.b.should == "\x00\x00".b
@io.rewind
File.write(@name, "\x00\x00a")
@io.set_encoding_by_bom.should == nil
@io.external_encoding.should == Encoding::ASCII_8BIT
@io.read.b.should == "\x00\x00a".b
@io.rewind
File.write(@name, "\x00\x00\xFE")
@io.set_encoding_by_bom.should == nil
@io.external_encoding.should == Encoding::ASCII_8BIT
@io.read.b.should == "\x00\x00\xFE".b
@io.rewind
File.write(@name, "\x00\x00\xFEa")
@io.set_encoding_by_bom.should == nil
@io.external_encoding.should == Encoding::ASCII_8BIT
@io.read.b.should == "\x00\x00\xFEa".b
end
it "returns nil if found BOM sequence not provided" do
File.write(@name, "abc")
@io.set_encoding_by_bom.should == nil
@io.external_encoding.should == Encoding::ASCII_8BIT
@io.read(3).should == "abc".b
end
it 'returns exception if io not in binary mode' do
not_binary_io = new_io(@name, 'r')
-> { not_binary_io.set_encoding_by_bom }.should raise_error(ArgumentError, 'ASCII incompatible encoding needs binmode')
ensure
not_binary_io.close
end
it 'returns exception if encoding already set' do
@io.set_encoding("utf-8")
-> { @io.set_encoding_by_bom }.should raise_error(ArgumentError, 'encoding is set to UTF-8 already')
end
it 'returns exception if encoding conversion is already set' do
@io.set_encoding(Encoding::UTF_8, Encoding::UTF_16BE)
-> { @io.set_encoding_by_bom }.should raise_error(ArgumentError, 'encoding conversion is set')
end
end
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