import unittest
import os.path
from irods.path import iRODSPath

_normalization_test_cases = [
    #  -- test case --                  -- reference --
    ("/zone",                           "/zone"),               # a normal path (1 element)
    ("/zone/",                          "/zone"),               # single-slash (1 element)
    ("/zone/abc",                       "/zone/abc"),           # a normal path (2 elements)
    ("/zone/abc/",                      "/zone/abc"),           # single-slash (2 elements)
    ("/zone/abc/.",                     "/zone/abc"),           # final "."
    ("/zone/abc/./",                    "/zone/abc"),           # final "." and "/"
    ("/zone/abc/..",                    "/zone"),               # final ".."
    ("/zone/abc/../",                   "/zone"),               # final ".." and "/"
    ("/zone1/../zone2",                 "/zone2"),              # replace one path element with another
    ("/zone/home1/../home2",            "/zone/home2"),         # same for a later path element
    ("/..",                             "/"),                   # go up (1x) above root collection
    ("/../..",                          "/"),                   # go up (2x) above root collection
    ("",                                "/"),                   # absolute makes a blank into the root collection
    (".",                               "/"),                   # absolute makes a single "." into the root collection
    ("./.",                             "/"),                   # absolute makes "." (2x) into the root collection
    ("././zone",                        "/zone"),               # absolute makes initial "." (2x) a NO-OP before a normal elem
    ("/./zone/abc",                     "/zone/abc"),           # initial (no-op) '.'
    ("/../zone",                        "/zone"),               # go up (1x) above root collection and back down
    ("/../zone/..",                     "/"),                   # go up (when first, this is a NO-OP); then down, up
    ("/../../zone",                     "/zone"),               # go up (2x) above root collection and back down
    ("//zone1/../.././zone2",           "/zone2"),              # double-slashes, multiple relative elems
    ("//zone1//../.././zone2",          "/zone2"),              # double-slashes (2x), multiple relative elems
    ("//zone//abc/.",                   "/zone/abc"),           # same with final "."
    ("//zone//abc/..",                  "/zone"),               # same with final ".."
    ("//zone//abc/./..",                "/zone"),               # same with final "." and ".."
    ("/zone//abc/./../",                "/zone"),               # mixed relative elems (./..) and final slashes
    ("/zone//abc/.././",                "/zone"),               # mixed relative elems (../.) and final slashes
    ("/zone/home1//user/./../trash",    "/zone/home1/trash"),   # intermediately situated double-slash and relative elems (vsn 1)
    ("/zone/home1//user/.././trash",    "/zone/home1/trash"),   # intermediately situated double-slash and relative elems (vsn 2)
]


class PathsTest(unittest.TestCase):
    def test_path_normalization__383(self):
        for test_path, reference in _normalization_test_cases:
            normalized_path = iRODSPath(test_path)
            self.assertEqual( normalized_path, reference )


if __name__ == '__main__':
    import sys
    # let the tests find the parent irods lib
    sys.path.insert(0, os.path.abspath('../..'))
    unittest.main()