import os
import SCons

env = Environment()
drive = os.path.splitdrive(os.getcwd())[0]
drive_dir = env.fs.Dir(drive)

if not isinstance(drive_dir, SCons.Node.FS.RootDir):
	raise Exception('env.fs.Dir("%s") returned a %s instead of a RootDir' %
					(drive, type(drive_dir)))

drive_abspath1 = drive_dir._abspath
drive_abspath2 = drive_dir.abspath
if drive_abspath1 != drive_abspath2:
	raise Exception('Calculated _abspath %s is not the same as abspath %s' %
					(drive_abspath1, drive_abspath2))
elif not os.path.exists(drive_abspath1):
	raise Exception('Calculated abspath %s does not exist' % drive_abspath1)
elif drive.rstrip(os.path.sep) != drive_abspath1.rstrip(os.path.sep):
	raise Exception('Real drive %s and calculated abspath %s are not the '
					'same' % (drive, drive_abspath1))

drive_path1 = drive_dir._path
drive_path2 = drive_dir.path
if drive_path1 != drive_path2:
	raise Exception('Calculated _path %s is not the same as path %s' %
					(drive_path1, drive_path2))
elif not os.path.exists(drive_path1):
	raise Exception('Calculated path %s does not exist' % drive_path1)
elif drive.rstrip(os.path.sep) != drive_path1.rstrip(os.path.sep):
	raise Exception('Real drive %s and calculated abspath %s are not the '
					'same' % (drive, drive_abs))