diff --git a/nativefs.lua b/nativefs.lua
index 61dab87..6db26c0 100644
--- a/nativefs.lua
+++ b/nativefs.lua
@@ -8,7 +8,7 @@ ffi.cdef([[
 
 	typedef struct FILE FILE;
 
-	FILE* fopen(const char* pathname, const char* mode);
+	FILE* fopen(const char* path, const char* mode);
 	size_t fread(void* ptr, size_t size, size_t nmemb, FILE* stream);
 	size_t fwrite(const void* ptr, size_t size, size_t nmemb, FILE* stream);
 	int fclose(FILE* stream);
@@ -20,9 +20,9 @@ ffi.cdef([[
 ]])
 
 local C = ffi.C
-local fclose, ftell, fseek, fflush, feof = C.fclose, C.ftell, C.fseek, C.fflush
-local fread, fwrite, feof, setvbuf = C.fread, C.fwrite, C.feof, C.setvbuf
-local fopen, getcwd, chdir, unlink -- system specific
+local fclose, ftell, fseek, fflush = C.fclose, C.ftell, C.fseek, C.fflush
+local fread, fwrite, setvbuf = C.fread, C.fwrite, C.setvbuf
+local fopen, getcwd, chdir, unlink, mkdir, rmdir, feof -- system specific
 local loveC = ffi.os == 'Windows' and ffi.load('love') or C
 
 local BUFFERMODE = {
@@ -37,10 +37,12 @@ if ffi.os == 'Windows' then
 		int WideCharToMultiByte(unsigned int cp, uint32_t flags, const wchar_t* wc, int cwc, const char* mb,
 		                        int cmb, const char* def, int* used);
 		int GetLogicalDrives(void);
+		int CreateDirectoryW(const wchar_t* path, void*);
 		int _wchdir(const wchar_t* path);
 		wchar_t* _wgetcwd(wchar_t* buffer, int maxlen);
-		FILE* _wfopen(const wchar_t* name, const wchar_t* mode);
-		int _wunlink(const wchar_t* name);
+		FILE* _wfopen(const wchar_t* path, const wchar_t* mode);
+		int _wunlink(const wchar_t* path);
+		int _wrmdir(const wchar_t* path);
 	]])
 
 	BUFFERMODE.line, BUFFERMODE.none = 64, 4
@@ -62,37 +64,54 @@ if ffi.os == 'Windows' then
 	local MAX_PATH = 260
 	local nameBuffer = ffi.new("wchar_t[?]", MAX_PATH + 1)
 
-	fopen = function(name, mode) return C._wfopen(towidestring(name), towidestring(mode)) end
+	fopen = function(path, mode) return C._wfopen(towidestring(path), towidestring(mode)) end
 	getcwd = function() return toutf8string(C._wgetcwd(nameBuffer, MAX_PATH)) end
-	chdir = function(path) return C._wchdir(towidestring(path)) end
-	unlink = function(name) return C._wunlink(towidestring(name)) end
+	chdir = function(path) return C._wchdir(towidestring(path)) == 0 end
+	unlink = function(path) return C._wunlink(towidestring(path)) == 0 end
+	mkdir = function(path) return C.CreateDirectoryW(towidestring(path), nil) ~= 0 end
+	rmdir = function(path) return C._wrmdir(towidestring(path)) == 0 end
 else
 	ffi.cdef([[
 		char* getcwd(char *buffer, int maxlen);
 		int chdir(const char* path);
 		int unlink(const char* path);
+		int mkdir(const char* path, int mode);
+		int rmdir(const char* path);
 	]])
 
 	local MAX_PATH = 4096
 	local nameBuffer = ffi.new("char[?]", MAX_PATH)
 
-	fopen, unlink, chdir = C.fopen, C.unlink, C.chdir
+	fopen = C.fopen
+	unlink = function(path) return ffi.C.unlink(path) == 0 end
+	chdir = function(path) return ffi.C.chdir(path) == 0 end
+	mkdir = function(path) return ffi.C.mkdir(path, 0x1ed) == 0 end
+	rmdir = function(path) return ffi.C.rmdir(path) == 0 end
+
 	getcwd = function()
 		local cwd = C.getcwd(nameBuffer, MAX_PATH)
 		return cwd ~= nil and ffi.string(cwd) or nil
 	end
 end
 
+feof = function(stream) return C.feof(stream) ~= 0 end
+
 -----------------------------------------------------------------------------
 -- NOTE: nil checks on file handles MUST be explicit (_handle == nil)
 -- due to ffi's NULL semantics!
 
-local File = {}
+local File = {
+	getBuffer = function(self) return self._bufferMode, self._bufferSize end,
+	getFilename = function(self) return self._name end,
+	getMode = function(self) return self._mode end,
+	isEOF = function(self) return not self:isOpen() or feof(self._handle) or self:tell() == self:getSize() end,
+	isOpen = function(self) return self._mode ~= 'c' and self._handle ~= nil end,
+}
+
 File.__index = File
 
 function File:open(mode)
 	if self._mode ~= 'c' then return false, "File is already open" end
-
 	if mode ~= 'r' and mode ~= 'w' and mode ~= 'a' then
 		return false, "Invalid file open mode: " .. mode
 	end
@@ -111,10 +130,7 @@ function File:open(mode)
 end
 
 function File:close()
-	if self._handle == nil or self._mode == 'c' then
-		return false, "File is not open"
-	end
-
+	if self._handle == nil or self._mode == 'c' then return false, "File is not open" end
 	ffi.gc(self._handle, nil)
 	fclose(self._handle)
 	self._handle, self._mode = nil, 'c'
@@ -122,29 +138,30 @@ function File:close()
 end
 
 function File:setBuffer(mode, size)
-	bufferMode = BUFFERMODE[mode]
+	local bufferMode = BUFFERMODE[mode]
 	if not bufferMode then
-		return false, "Invalid buffer mode: " .. mode .. " (expected 'none', 'full', or 'line')"
+		return false, "Invalid buffer mode " .. mode .. " (expected 'none', 'full', or 'line')"
 	end
 
-	size = math.max(0, size or 0)
-	self._bufferMode, self._bufferSize = mode, size
-	if self._mode == 'c' then return true end
+	if mode == 'line' or mode == 'full' then
+		size = math.max(2, size or 2) -- Windows requires buffer to be at least 2 bytes
+	else
+		size = math.max(0, size or 0)
+	end
+	if self._mode == 'c' then
+		self._bufferMode, self._bufferSize = mode, size
+		return true
+	end
 
-	return C.setvbuf(self._handle, nil, bufferMode, size) == 0
+	local success = C.setvbuf(self._handle, nil, bufferMode, size) == 0
+	if success then
+		self._bufferMode, self._bufferSize = mode, size
+		return true
+	end
+
+	return false, "Could not set buffer mode"
 end
 
-function File:getBuffer()
-	return self._bufferMode, self._bufferSize
-end
-
-function File:getFilename()
-	return self._name
-end
-
-function File:getMode()
-	return self._mode
-end
 
 function File:getSize()
 	-- NOTE: The correct way to do this would be a stat() call, which requires a
@@ -166,14 +183,6 @@ function File:getSize()
 	return size;
 end
 
-function File:isEOF()
-	return not self:isOpen() or feof(self._handle) ~= 0
-end
-
-function File:isOpen()
-	return self._mode ~= 'c' and self._handle ~= nil
-end
-
 function File:read(containerOrBytes, bytes)
 	if self._handle == nil or self._mode ~= 'r' then
 		return nil, 0
@@ -208,6 +217,38 @@ function File:read(containerOrBytes, bytes)
 end
 
 function File:lines()
+	if self._mode ~= 'r' then
+		error("File is not opened for reading")
+	end
+
+	local BUFFERSIZE = 4096
+	local buffer = ffi.new('unsigned char[?]', BUFFERSIZE)
+	local bytesRead = tonumber(fread(buffer, 1, BUFFERSIZE, self._handle))
+
+	local bufferPos = 0
+	local offset = self:tell()
+	return function()
+		self:seek(offset)
+		local line = {}
+		data = data
+		while true do
+			for i = bufferPos, bytesRead - 1 do
+				if buffer[i] ~= 10 and buffer[i] ~= 13 then
+					table.insert(line, string.char(buffer[i]))
+				elseif buffer[i] == 10 then
+					bufferPos = i + 1
+					return table.concat(line)
+				end
+			end
+
+			bytesRead = tonumber(fread(buffer, 1, BUFFERSIZE, self._handle))
+			if bytesRead == 0 then break end
+			offset, bufferPos = offset + bytesRead, 0
+		end
+		if #line > 0 then
+			return table.concat(line)
+		end
+	end
 end
 
 function File:write(data, size)
@@ -241,8 +282,8 @@ function File:tell()
 end
 
 function File:flush()
-	if self._handle == nil then return end
-	return fflush(self._handle)
+	if self._handle == nil then return false, "File is not open" end
+	return fflush(self._handle) == 0
 end
 
 function File:release()
@@ -366,7 +407,7 @@ function nativefs.getWorkingDirectory()
 end
 
 function nativefs.setWorkingDirectory(path)
-	if chdir(path) ~= 0 then
+	if not chdir(path) then
 		return false, "Could not set working directory"
 	end
 	return true
@@ -398,11 +439,27 @@ function nativefs.getInfo(path, filtertype)
 end
 
 function nativefs.createDirectory(path)
+	local current = ''
+	for dir in path:gmatch('[^/\\]+') do
+		current = (current == '' and current or current .. '/') .. dir
+		local info = nativefs.getInfo(current, 'directory')
+		if not info and not mkdir(current) then
+			return false, "Could not create directory " .. current
+		end
+	end
+	return true
 end
 
 function nativefs.remove(name)
-	if unlink(name) ~= 0 then
-		return false, "Could not remove file " .. name
+	local info = nativefs.getInfo(name)
+	if info.type == 'directory' then
+		if not rmdir(name) then
+			return false, "Could not remove directory " .. name
+		end
+	else
+		if not unlink(name) then
+			return false, "Could not remove file " .. name
+		end
 	end
 	return true
 end
diff --git a/test/data/𠆢ßЩ.txt b/test/data/𠆢ßЩ.txt
new file mode 100644
index 0000000..3c54fc6
--- /dev/null
+++ b/test/data/𠆢ßЩ.txt
@@ -0,0 +1,4 @@
+Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua.
+Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat.
+Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur.
+Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum.
diff --git a/test/main.lua b/test/main.lua
index bb0473c..91df0c0 100644
--- a/test/main.lua
+++ b/test/main.lua
@@ -6,11 +6,11 @@ local lu = require('luaunit')
 local fs
 
 local equals, notEquals = lu.assertEquals, lu.assertNotEquals
-local isError, containsError = lu.assertErrorMsgEquals, lu.assertErrorMsgContains
 local contains = lu.assertStrContains
 
 local function notFailed(ok, err)
 	equals(ok, true)
+	if err then print("ERROR: " .. err) end
 	equals(err, nil)
 end
 
@@ -23,6 +23,9 @@ end
 
 -----------------------------------------------------------------------------
 
+local testFile1, testSize1 = 'data/ümläüt.txt', 446
+local testFile2, testSize2 = 'data/𠆢ßЩ.txt', 450
+
 function test_fs_newFile()
 	local file = fs.newFile('test.file')
 	notEquals(file, nil)
@@ -30,37 +33,37 @@ function test_fs_newFile()
 end
 
 function test_fs_newFileData()
-	local fd = fs.newFileData('data/ümläüt.txt')
-	local filesize = love.filesystem.newFile('data/ümläüt.txt'):getSize()
+	local fd = fs.newFileData(testFile1)
+	local filesize = love.filesystem.newFile(testFile1):getSize()
 	equals(fd:getSize(), filesize)
 
-	local d = love.filesystem.read('data/ümläüt.txt')
+	local d = love.filesystem.read(testFile1)
 	equals(fd:getString(), d)
 end
 
 function test_fs_mount()
 	equals(fs.mount('data', 'test_data'), true)
-	local data, size = love.filesystem.read('test_data/ümläüt.txt')
+	local data, size = love.filesystem.read('test_data/' .. love.path.leaf(testFile1))
 	notEquals(data, nil)
 	notEquals(size, nil)
 	equals(fs.unmount('data'), true)
 end
 
 function test_fs_read()
-	local text, textSize = love.filesystem.read('data/ümläüt.txt')
-	local data, size = fs.read('data/ümläüt.txt')
+	local text, textSize = love.filesystem.read(testFile1)
+	local data, size = fs.read(testFile1)
 	equals(size, textSize)
 	equals(data, text)
 
-	local data, size = fs.read('data/ümläüt.txt', 'all')
+	local data, size = fs.read(testFile1, 'all')
 	equals(size, textSize)
 	equals(data, text)
 
-	local data, size = fs.read('string', 'data/ümläüt.txt')
+	local data, size = fs.read('string', testFile1)
 	equals(size, textSize)
 	equals(data, text)
 
-	local data, size = fs.read('data', 'data/ümläüt.txt', 'all')
+	local data, size = fs.read('data', testFile1, 'all')
 	equals(size, textSize)
 	equals(data:type(), 'FileData')
 	equals(data:getSize(), size)
@@ -72,7 +75,7 @@ function test_fs_read()
 end
 
 function test_fs_write()
-	local data, size = fs.read('data/ümläüt.txt')
+	local data, size = fs.read(testFile1)
 	notFailed(fs.write('data/write.test', data))
 
 	local data2, size2 = love.filesystem.read('data', 'data/write.test')
@@ -84,7 +87,7 @@ function test_fs_write()
 end
 
 function test_fs_append()
-	local text, textSize = love.filesystem.read('data/ümläüt.txt')
+	local text, textSize = love.filesystem.read(testFile1)
 	fs.write('data/append.test', text)
 	fs.append('data/append.test', text)
 
@@ -96,6 +99,20 @@ function test_fs_append()
 end
 
 function test_fs_lines()
+	local count, bytes = 0, 0
+	for line in fs.lines(testFile1) do
+		count = count + 1
+		bytes = bytes + #line
+	end
+	equals(count, 4)
+	equals(bytes, testSize1 - count)
+
+	local code = ""
+	for line in fs.lines('main.lua') do
+		code = code .. line .. '\n'
+	end
+	local r = fs.read('main.lua')
+	equals(code, r)
 end
 
 function test_fs_load()
@@ -155,27 +172,40 @@ function test_fs_getInfo()
 	notEquals(info, nil)
 	equals(info.type, 'file')
 
-	local info = fs.getInfo('data/ümläüt.txt')
+	local info = fs.getInfo(testFile1)
 	notEquals(info, nil)
 	equals(info.type, 'file')
-	equals(info.size, 446)
+	equals(info.size, testSize1)
 	notEquals(info.modtime, nil)
 end
 
 function test_fs_createDirectory()
+	notFailed(fs.createDirectory('data/a/b/c/defg/h'))
+	fs.remove('data/a/b/c/defg/h')
+	fs.remove('data/a/b/c/defg')
+	fs.remove('data/a/b/c')
+	fs.remove('data/a/b')
+	fs.remove('data/a')
 end
 
 function test_fs_remove()
-	local text = love.filesystem.read('data/ümläüt.txt')
+	local text = love.filesystem.read(testFile1)
 	fs.write('data/remove.test', text)
 	notFailed(fs.remove('data/remove.test'))
 	equals(love.filesystem.getInfo('data/remove.test'), nil)
+
+	fs.createDirectory('data/test1')
+	fs.createDirectory('data/test1/test2')
+	notFailed(fs.remove('data/test1/test2'))
+	equals(love.filesystem.getInfo('data/test1/test2'), nil)
+	notFailed(fs.remove('data/test1'))
+	equals(love.filesystem.getInfo('data/test1'), nil)
 end
 
 -----------------------------------------------------------------------------
 
 function test_File_open()
-	local f = fs.newFile('data/ümläüt.txt')
+	local f = fs.newFile(testFile1)
 	notEquals(f, nil)
 	equals(f:isOpen(), false)
 	equals(f:getMode(), 'c')
@@ -195,16 +225,23 @@ function test_File_open()
 	equals(f:getMode(), 'c')
 	f:close()
 
-	local f = fs.newFile('data/𠆢ßЩ.txt')
+	local f = fs.newFile(testFile2)
 	notFailed(f:open('r'))
 	f:close()
 end
 
 function test_File_setBuffer()
+	local f = fs.newFile('data/test.test')
+	f:open('w')
+	notFailed(f:setBuffer('none', 0))
+	notFailed(f:setBuffer('line', 0))
+	notFailed(f:setBuffer('full', 0))
+	f:close()
+	fs.remove('data/test.test')
 end
 
 function test_File_isEOF()
-	local f = love.filesystem.newFile('data/ümläüt.txt')
+	local f = fs.newFile(testFile1)
 	f:open('r')
 	f:read(f:getSize() - 1)
 	equals(f:isEOF(), false)
@@ -214,27 +251,84 @@ function test_File_isEOF()
 end
 
 function test_File_read()
+	local f = fs.newFile(testFile1)
+	f:open('r')
+	local data, size = f:read(5)
+	equals(data, 'Lorem')
+
+	local data, size = f:read(6)
+	equals(data, ' ipsum')
+	f:close()
 end
 
 function test_File_lines()
+	local text = fs.read(testFile2)
+	local f = fs.newFile(testFile2)
+	local lines = ""
+	f:open('r')
+	for line in f:lines() do lines = lines .. line .. '\r\n' end
+	f:close()
+	equals(lines, text)
+
+	local text = fs.read(testFile1)
+	local f = fs.newFile(testFile1)
+	local lines = ""
+	f:open('r')
+	for line in f:lines() do lines = lines .. line .. '\n' end
+	f:close()
+	equals(lines, text)
 end
 
 function test_File_write()
+	local f = fs.newFile('data/write.test')
+	notFailed(f:open('w'))
+	notFailed(f:write('hello'))
+	f:close()
+	f:open('a')
+	notFailed(f:write('world'))
+	f:close()
+
+	notFailed(f:open('r'))
+	local hello, size = f:read()
+	equals(hello, 'helloworld')
+	equals(size, #'helloworld')
+	f:close()
+
+	fs.remove('data/write.test')
 end
 
 function test_File_seek()
+	local f = fs.newFile(testFile1)
+	f:open('r')
+	f:seek(72)
+	local data, size = f:read(6)
+	equals(data, 'tempor')
+	f:close()
 end
 
 function test_File_tell()
+	local f = fs.newFile(testFile1)
+	f:open('r')
+	f:read(172)
+	equals(f:tell(), 172)
+	f:close()
 end
 
 function test_File_flush()
+	local f = fs.newFile('data/write.test')
+	f:open('w')
+	f:write('hello')
+	notFailed(f:flush())
+	f:close()
 end
 
 local _globals = {}
 
 function test_xxx_globalsCheck()
 	for k, v in pairs(_G) do
+		if v ~= _globals[k] then
+			print("LEAKED GLOBAL: " .. k)
+		end
 		equals(v, _globals[k])
 	end
 end