if !success(`iconv --version`)
	warn("iconv not found, skipping unicode tests!")
	@windows_only warn("Use WinRPM.install(\"win_iconv\") to run these tests")
else
	# Create unicode test data directory
	unicodedir = mktempdir()

	# Use perl to generate the primary data
	primary_encoding = "UTF-32BE"
	primary_path = replace(joinpath(unicodedir, primary_encoding*".unicode"),"\\","\\\\\\\\")
	run(`perl -e "
	$$fname = \"$primary_path\";
	open(UNICODEF, \">\", \"$$fname\")         or die \"can\'t open $$fname: $$!\";
	binmode(UNICODEF);
	print UNICODEF pack \"N*\", 0xfeff, 0..0xd7ff, 0xe000..0x10ffff;
	close(UNICODEF);"` )

	# Use iconv to generate the other data
	for encoding in ["UTF-32LE", "UTF-16BE", "UTF-16LE", "UTF-8"]
	    output_path = joinpath(unicodedir, encoding*".unicode")
	    f = Base.FS.open(output_path,Base.JL_O_WRONLY|Base.JL_O_CREAT,Base.S_IRUSR | Base.S_IWUSR | Base.S_IRGRP | Base.S_IROTH)
	    run(`iconv -f $primary_encoding -t $encoding $primary_path` |> f)
	    Base.FS.close(f)
	end

	f=open(joinpath(unicodedir,"UTF-32LE.unicode"))
	str1 = UTF32String(reinterpret(Char, read(f, Uint32, 1112065)[2:end]))
	close(f)

	f=open(joinpath(unicodedir,"UTF-8.unicode"))
	str2 = UTF8String(read(f, Uint8, 4382595)[4:end])
	close(f)
	@test str1 == str2

	str1 = "∀ ε > 0, ∃ δ > 0: |x-y| < δ ⇒ |f(x)-f(y)| < ε"
	str2 = UTF32String(
	    8704, 32, 949, 32, 62, 32, 48, 44, 32, 8707, 32,
	    948, 32, 62, 32, 48, 58, 32, 124, 120, 45, 121, 124,
	    32, 60, 32, 948, 32, 8658, 32, 124, 102, 40, 120,
	    41, 45, 102, 40, 121, 41, 124, 32, 60, 32, 949
	)
	@test str1 == str2

	# Cleanup unicode data
	for encoding in ["UTF-32BE", "UTF-32LE", "UTF-16BE", "UTF-16LE", "UTF-8"]
	    rm(joinpath(unicodedir,encoding*".unicode"))
	end
	rmdir(unicodedir)

	# UTF16
	u8 = "𝕥𝟶f𠂊"
	u16 = utf16(u8)
	@test length(u16.data) == 7
	@test length(u16) == 4
	@test utf8(u16) == u8
	@test collect(u8) == collect(u16)
end