view tests/test-hybridencode.py @ 40326:fed697fa1734

sqlitestore: file storage backend using SQLite

This commit provides an extension which uses SQLite to store file
data (as opposed to revlogs).

As the inline documentation describes, there are still several
aspects to the extension that are incomplete. But it's a start.
The extension does support basic clone, checkout, and commit
workflows, which makes it suitable for simple use cases.

One notable missing feature is support for "bundlerepos." This is
probably responsible for the most test failures when the extension
is activated as part of the test suite.

All revision data is stored in SQLite. Data is stored as zstd
compressed chunks (default if zstd is available), zlib compressed
chunks (default if zstd is not available), or raw chunks (if
configured or if a compressed delta is not smaller than the raw
delta). This makes things very similar to revlogs.

Unlike revlogs, the extension doesn't yet enforce a limit on delta
chain length. This is an obvious limitation and should be addressed.
This is somewhat mitigated by the use of zstd, which is much faster
than zlib to decompress.

There is a dedicated table for storing deltas. Deltas are stored
by the SHA-1 hash of their uncompressed content. The "fileindex" table
has columns that reference the delta for each revision and the base
delta that delta should be applied against. A recursive SQL query
is used to resolve the delta chain along with the delta data.

By storing deltas by hash, we are able to de-duplicate delta storage!
With revlogs, the same deltas in different revlogs would result in
duplicate storage of that delta. In this scheme, inserting the
duplicate delta is a no-op and delta chains simply reference the
existing delta.

When initially implementing this extension, I did not have
content-indexed deltas and deltas could be duplicated across files
(just like revlogs). When I implemented content-indexed deltas, the
size of the SQLite database for a full clone of mozilla-unified
dropped:

before: 2,554,261,504 bytes
after:  2,488,754,176 bytes

Surprisingly, this is still larger than the bytes size of revlog
files:

revlog files: 2,104,861,230 bytes
du -b:        2,254,381,614

I would have expected storage to be smaller since we're not limiting
delta chain length and since we're using zstd instead of zlib. I
suspect the SQLite indexes and per-column overhead account for the
bulk of the differences. (Keep in mind that revlog uses a 64-byte
packed struct for revision index data and deltas are stored without
padding. Aside from the 12 unused bytes in the 32 byte node field,
revlogs are pretty efficient.) Another source of overhead is file
name storage. With revlogs, file names are stored in the filesystem.
But with SQLite, we need to store file names in the database. This is
roughly equivalent to the size of the fncache file, which for the
mozilla-unified repository is ~34MB.

Since the SQLite database isn't append-only and since delta chains
can reference any delta, this opens some interesting possibilities.
For example, we could store deltas in reverse, such that fulltexts
are stored for newer revisions and deltas are applied to reconstruct
older revisions. This is likely a more optimal storage strategy for
version control, as new data tends to be more frequently accessed
than old data. We would obviously need wire protocol support for
transferring revision data from newest to oldest. And we would
probably need some kind of mechanism for "re-encoding" stores. But
it should be doable.

This extension is very much experimental quality. There are a handful
of features that don't work. It probably isn't suitable for day-to-day
use. But it could be used in limited cases (e.g. read-only checkouts
like in CI). And it is also a good proving ground for alternate
storage backends. As we continue to define interfaces for all things
storage, it will be useful to have a viable alternate storage backend
to see how things shake out in practice.

test-storage.py passes on Python 2 and introduces no new test failures on
Python 3. Having the storage-level unit tests has proved to be insanely
useful when developing this extension. Those tests caught numerous bugs
during development and I'm convinced this style of testing is the way
forward for ensuring alternate storage backends work as intended. Of
course, test coverage isn't close to what it needs to be. But it is
a start. And what coverage we have gives me confidence that basic store
functionality is implemented properly.

Differential Revision: https://phab.mercurial-scm.org/D4928

from __future__ import absolute_import, print_function

import unittest

from mercurial import (
    store,
)

class hybridencodetests(unittest.TestCase):
    def hybridencode(self, input, want):

        # Check the C implementation if it's in use
        got = store._pathencode(input)
        self.assertEqual(want, got)
        # Check the reference implementation in Python
        refgot = store._hybridencode(input, True)
        self.assertEqual(want, refgot)

    def testnoencodingrequired(self):
        self.hybridencode(
            b'data/abcdefghijklmnopqrstuvwxyz0123456789 !#%&\'()+,-.;=[]^`{}',
            b'data/abcdefghijklmnopqrstuvwxyz0123456789 !#%&\'()+,-.;=[]^`{}')

    def testuppercasechars(self): # uppercase char X is encoded as _x
        self.hybridencode(
            b'data/ABCDEFGHIJKLMNOPQRSTUVWXYZ',
            b'data/_a_b_c_d_e_f_g_h_i_j_k_l_m_n_o_p_q_r_s_t_u_v_w_x_y_z')

    def testunderbar(self): # underbar is doubled
        self.hybridencode(b'data/_', b'data/__')

    def testtilde(self): # tilde is character-encoded
        self.hybridencode(b'data/~', b'data/~7e')

    def testcontrolchars(self): # characters in ASCII code range 1..31
        self.hybridencode(
            (b'data/\x01\x02\x03\x04\x05\x06\x07\x08\t\n\x0b\x0c\r\x0e\x0f'
             b'\x10\x11\x12\x13\x14\x15\x16\x17\x18\x19\x1a\x1b\x1c\x1d\x1e'
             b'\x1f'),
            (b'data/~01~02~03~04~05~06~07~08~09~0a~0b~0c~0d~0e~0f~10~11~12~13'
             b'~14~15~16~17~18~19~1a~1b~1c~1d~1e~1f'))

    def testhighascii(self):# characters in ASCII code range 126..255
        self.hybridencode(
            (b'data/~\x7f\x80\x81\x82\x83\x84\x85\x86\x87\x88\x89\x8a\x8b\x8c'
             b'\x8d\x8e\x8f\x90\x91\x92\x93\x94\x95\x96\x97\x98\x99\x9a\x9b'
             b'\x9c\x9d\x9e\x9f'),
            (b'data/~7e~7f~80~81~82~83~84~85~86~87~88~89~8a~8b~8c~8d~8e~8f~90'
             b'~91~92~93~94~95~96~97~98~99~9a~9b~9c~9d~9e~9f'))
        self.hybridencode(
            (b'data/\xa0\xa1\xa2\xa3\xa4\xa5\xa6\xa7\xa8\xa9\xaa\xab\xac\xad'
             b'\xae\xaf\xb0\xb1\xb2\xb3\xb4\xb5\xb6\xb7\xb8\xb9\xba\xbb\xbc'
             b'\xbd\xbe\xbf'),
            (b'data/~a0~a1~a2~a3~a4~a5~a6~a7~a8~a9~aa~ab~ac~ad~ae~af~b0~b1~b2'
             b'~b3~b4~b5~b6~b7~b8~b9~ba~bb~bc~bd~be~bf'))
        self.hybridencode(
            (b'data/\xc0\xc1\xc2\xc3\xc4\xc5\xc6\xc7\xc8\xc9\xca'
             b'\xcb\xcc\xcd\xce\xcf\xd0\xd1\xd2\xd3\xd4\xd5\xd6'
             b'\xd7\xd8\xd9\xda\xdb\xdc\xdd\xde\xdf'),
            (b'data/~c0~c1~c2~c3~c4~c5~c6~c7~c8~c9~ca~cb~cc~cd~ce~cf~d0~d1~d2'
             b'~d3~d4~d5~d6~d7~d8~d9~da~db~dc~dd~de~df'))
        self.hybridencode(
            (b'data/\xe0\xe1\xe2\xe3\xe4\xe5\xe6\xe7\xe8\xe9\xea\xeb\xec\xed'
             b'\xee\xef\xf0\xf1\xf2\xf3\xf4\xf5\xf6\xf7\xf8\xf9\xfa\xfb\xfc\xfd'
             b'\xfe\xff'),
            (b'data/~e0~e1~e2~e3~e4~e5~e6~e7~e8~e9~ea~eb~ec~ed~ee~ef~f0~f1~f2'
             b'~f3~f4~f5~f6~f7~f8~f9~fa~fb~fc~fd~fe~ff'))

    def testwinreserved(self): # Windows reserved characters
        self.hybridencode(
            (b'data/less <, greater >, colon :, double-quote ", backslash \\, '
             b'pipe |, question-mark ?, asterisk *'),
            (b'data/less ~3c, greater ~3e, colon ~3a, double-quote ~22, '
             b'backslash ~5c, pipe ~7c, question-mark ~3f, asterisk ~2a'))

    def testhgreserved(self):
        # encoding directories ending in .hg, .i or .d with '.hg' suffix
        self.hybridencode(b'data/x.h.i/x.hg/x.i/x.d/foo',
                          b'data/x.h.i.hg/x.hg.hg/x.i.hg/x.d.hg/foo')
        self.hybridencode(b'data/a.hg/a.i/a.d/foo',
                          b'data/a.hg.hg/a.i.hg/a.d.hg/foo')
        self.hybridencode(b'data/au.hg/au.i/au.d/foo',
                          b'data/au.hg.hg/au.i.hg/au.d.hg/foo')
        self.hybridencode(b'data/aux.hg/aux.i/aux.d/foo',
                          b'data/au~78.hg.hg/au~78.i.hg/au~78.d.hg/foo')
        self.hybridencode(b'data/auxy.hg/auxy.i/auxy.d/foo',
                          b'data/auxy.hg.hg/auxy.i.hg/auxy.d.hg/foo')
        # but these are not encoded on *filenames*
        self.hybridencode(b'data/foo/x.hg', b'data/foo/x.hg')
        self.hybridencode(b'data/foo/x.i', b'data/foo/x.i')
        self.hybridencode(b'data/foo/x.d', b'data/foo/x.d')
        self.hybridencode(b'data/foo/a.hg', b'data/foo/a.hg')
        self.hybridencode(b'data/foo/a.i', b'data/foo/a.i')
        self.hybridencode(b'data/foo/a.d', b'data/foo/a.d')
        self.hybridencode(b'data/foo/au.hg', b'data/foo/au.hg')
        self.hybridencode(b'data/foo/au.i', b'data/foo/au.i')
        self.hybridencode(b'data/foo/au.d', b'data/foo/au.d')
        self.hybridencode(b'data/foo/aux.hg', b'data/foo/au~78.hg')
        self.hybridencode(b'data/foo/aux.i', b'data/foo/au~78.i')
        self.hybridencode(b'data/foo/aux.d', b'data/foo/au~78.d')
        self.hybridencode(b'data/foo/auxy.hg', b'data/foo/auxy.hg')
        self.hybridencode(b'data/foo/auxy.i', b'data/foo/auxy.i')
        self.hybridencode(b'data/foo/auxy.d', b'data/foo/auxy.d')

        # plain .hg, .i and .d directories have the leading dot encoded
        self.hybridencode(b'data/.hg/.i/.d/foo',
                          b'data/~2ehg.hg/~2ei.hg/~2ed.hg/foo')

    def testmisclongcases(self):
        self.hybridencode(
            (b'data/aux.bla/bla.aux/prn/PRN/lpt/com3/nul/'
             b'coma/foo.NUL/normal.c.i'),
            (b'data/au~78.bla/bla.aux/pr~6e/_p_r_n/lpt/co~6d3'
             b'/nu~6c/coma/foo._n_u_l/normal.c.i'))
        self.hybridencode(
            (b'data/AUX/SECOND/X.PRN/FOURTH/FI:FTH/SIXTH/SEVENTH/EIGHTH/NINETH'
             b'/TENTH/ELEVENTH/LOREMIPSUM.TXT.i'),
            (b'dh/au~78/second/x.prn/fourth/fi~3afth/sixth/seventh/eighth/'
             b'nineth/tenth/loremia20419e358ddff1bf8751e38288aff1d7c32ec05.i'))
        self.hybridencode(
            (b'data/enterprise/openesbaddons/contrib-imola/corba-bc/'
             b'netbeansplugin/wsdlExtension/src/main/java/META-INF/services'
             b'/org.netbeans.modules.xml.wsdl.bindingsupport.spi.'
             b'ExtensibilityElementTemplateProvider.i'),
            (b'dh/enterpri/openesba/contrib-/corba-bc/netbeans/wsdlexte/src/'
             b'main/java/org.net7018f27961fdf338a598a40c4683429e7ffb9743.i'))
        self.hybridencode(
            (b'data/AUX.THE-QUICK-BROWN-FOX-JU:MPS-OVER-THE-LAZY-DOG-THE-'
             b'QUICK-BROWN-FOX-JUMPS-OVER-THE-LAZY-DOG.TXT.i'),
            (b'dh/au~78.the-quick-brown-fox-ju~3amps-over-the-lazy-dog-the-'
             b'quick-brown-fox-jud4dcadd033000ab2b26eb66bae1906bcb15d4a70.i'))
        self.hybridencode(
            (b'data/Project Planning/Resources/AnotherLongDirectoryName/Follow'
             b'edbyanother/AndAnother/AndThenAnExtremelyLongFileName.txt'),
            (b'dh/project_/resource/anotherl/followed/andanoth/andthenanextrem'
             b'elylongfilenaf93030515d9849cfdca52937c2204d19f83913e5.txt'))
        self.hybridencode(
            (b'data/Project.Planning/Resources/AnotherLongDirectoryName/Follo'
             b'wedbyanother/AndAnother/AndThenAnExtremelyLongFileName.txt'),
            (b'dh/project_/resource/anotherl/followed/andanoth/andthenanextre'
             b'melylongfilena0fd7c506f5c9d58204444fc67e9499006bd2d445.txt'))
        self.hybridencode(
            b'data/foo.../foo   / /a./_. /__/.x../    bla/.FOO/something.i',
            (b'data/foo..~2e/foo  ~20/~20/a~2e/__.~20/____/~2ex.~2e/~20   bla/'
             b'~2e_f_o_o/something.i'))
        self.hybridencode(
            b'data/c/co/com/com0/com1/com2/com3/com4/com5/com6/com7/com8/com9',
            (b'data/c/co/com/com0/co~6d1/co~6d2/co~6d3/co~6d4/co~6d5/co~6d6/'
             b'co~6d7/co~6d8/co~6d9'))
        self.hybridencode(
            b'data/C/CO/COM/COM0/COM1/COM2/COM3/COM4/COM5/COM6/COM7/COM8/COM9',
            (b'data/_c/_c_o/_c_o_m/_c_o_m0/_c_o_m1/_c_o_m2/_c_o_m3/_c_o_m4/'
             b'_c_o_m5/_c_o_m6/_c_o_m7/_c_o_m8/_c_o_m9'))
        self.hybridencode(
            (b'data/c.x/co.x/com.x/com0.x/com1.x/com2.x/com3.x/com4.x/com5.x/'
             b'com6.x/com7.x/com8.x/com9.x'),
            (b'data/c.x/co.x/com.x/com0.x/co~6d1.x/co~6d2.x/co~6d3.x/co~6d4.x'
             b'/co~6d5.x/co~6d6.x/co~6d7.x/co~6d8.x/co~6d9.x'))
        self.hybridencode(
            (b'data/x.c/x.co/x.com0/x.com1/x.com2/x.com3/x.com4/x.com5/x.com6'
             b'/x.com7/x.com8/x.com9'),
            (b'data/x.c/x.co/x.com0/x.com1/x.com2/x.com3/x.com4/x.com5/x.com6'
             b'/x.com7/x.com8/x.com9'))
        self.hybridencode(
            (b'data/cx/cox/comx/com0x/com1x/com2x/com3x/com4x/com5x/com6x/'
             b'com7x/com8x/com9x'),
            (b'data/cx/cox/comx/com0x/com1x/com2x/com3x/com4x/com5x/com6x/'
             b'com7x/com8x/com9x'))
        self.hybridencode(
            (b'data/xc/xco/xcom0/xcom1/xcom2/xcom3/xcom4/xcom5/xcom6/xcom7/'
             b'xcom8/xcom9'),
            (b'data/xc/xco/xcom0/xcom1/xcom2/xcom3/xcom4/xcom5/xcom6/xcom7/'
             b'xcom8/xcom9'))
        self.hybridencode(
            b'data/l/lp/lpt/lpt0/lpt1/lpt2/lpt3/lpt4/lpt5/lpt6/lpt7/lpt8/lpt9',
            (b'data/l/lp/lpt/lpt0/lp~741/lp~742/lp~743/lp~744/lp~745/lp~746/'
             b'lp~747/lp~748/lp~749'))
        self.hybridencode(
            b'data/L/LP/LPT/LPT0/LPT1/LPT2/LPT3/LPT4/LPT5/LPT6/LPT7/LPT8/LPT9',
            (b'data/_l/_l_p/_l_p_t/_l_p_t0/_l_p_t1/_l_p_t2/_l_p_t3/_l_p_t4/'
             b'_l_p_t5/_l_p_t6/_l_p_t7/_l_p_t8/_l_p_t9'))
        self.hybridencode(
            (b'data/l.x/lp.x/lpt.x/lpt0.x/lpt1.x/lpt2.x/lpt3.x/lpt4.x/lpt5.x/'
             b'lpt6.x/lpt7.x/lpt8.x/lpt9.x'),
            (b'data/l.x/lp.x/lpt.x/lpt0.x/lp~741.x/lp~742.x/lp~743.x/lp~744.x/'
             b'lp~745.x/lp~746.x/lp~747.x/lp~748.x/lp~749.x'))
        self.hybridencode(
            (b'data/x.l/x.lp/x.lpt/x.lpt0/x.lpt1/x.lpt2/x.lpt3/x.lpt4/x.lpt5/'
             b'x.lpt6/x.lpt7/x.lpt8/x.lpt9'),
            (b'data/x.l/x.lp/x.lpt/x.lpt0/x.lpt1/x.lpt2/x.lpt3/x.lpt4/x.lpt5'
             b'/x.lpt6/x.lpt7/x.lpt8/x.lpt9'))
        self.hybridencode(
            (b'data/lx/lpx/lptx/lpt0x/lpt1x/lpt2x/lpt3x/lpt4x/lpt5x/lpt6x/'
             b'lpt7x/lpt8x/lpt9x'),
            (b'data/lx/lpx/lptx/lpt0x/lpt1x/lpt2x/lpt3x/lpt4x/lpt5x/lpt6x/'
             b'lpt7x/lpt8x/lpt9x'))
        self.hybridencode(
            (b'data/xl/xlp/xlpt/xlpt0/xlpt1/xlpt2/xlpt3/xlpt4/xlpt5/xlpt6/'
             b'xlpt7/xlpt8/xlpt9'),
            (b'data/xl/xlp/xlpt/xlpt0/xlpt1/xlpt2/xlpt3/xlpt4/xlpt5/xlpt6/'
             b'xlpt7/xlpt8/xlpt9'))
        self.hybridencode(b'data/con/p/pr/prn/a/au/aux/n/nu/nul',
                          b'data/co~6e/p/pr/pr~6e/a/au/au~78/n/nu/nu~6c')
        self.hybridencode(
            b'data/CON/P/PR/PRN/A/AU/AUX/N/NU/NUL',
            b'data/_c_o_n/_p/_p_r/_p_r_n/_a/_a_u/_a_u_x/_n/_n_u/_n_u_l')
        self.hybridencode(
            b'data/con.x/p.x/pr.x/prn.x/a.x/au.x/aux.x/n.x/nu.x/nul.x',
            b'data/co~6e.x/p.x/pr.x/pr~6e.x/a.x/au.x/au~78.x/n.x/nu.x/nu~6c.x')
        self.hybridencode(
            b'data/x.con/x.p/x.pr/x.prn/x.a/x.au/x.aux/x.n/x.nu/x.nul',
            b'data/x.con/x.p/x.pr/x.prn/x.a/x.au/x.aux/x.n/x.nu/x.nul')
        self.hybridencode(b'data/conx/px/prx/prnx/ax/aux/auxx/nx/nux/nulx',
                          b'data/conx/px/prx/prnx/ax/au~78/auxx/nx/nux/nulx')
        self.hybridencode(b'data/xcon/xp/xpr/xprn/xa/xau/xaux/xn/xnu/xnul',
                          b'data/xcon/xp/xpr/xprn/xa/xau/xaux/xn/xnu/xnul')
        self.hybridencode(b'data/a./au./aux./auxy./aux.',
                          b'data/a~2e/au~2e/au~78~2e/auxy~2e/au~78~2e')
        self.hybridencode(b'data/c./co./con./cony./con.',
                          b'data/c~2e/co~2e/co~6e~2e/cony~2e/co~6e~2e')
        self.hybridencode(b'data/p./pr./prn./prny./prn.',
                          b'data/p~2e/pr~2e/pr~6e~2e/prny~2e/pr~6e~2e')
        self.hybridencode(b'data/n./nu./nul./nuly./nul.',
                          b'data/n~2e/nu~2e/nu~6c~2e/nuly~2e/nu~6c~2e')
        self.hybridencode(
            b'data/l./lp./lpt./lpt1./lpt1y./lpt1.',
            b'data/l~2e/lp~2e/lpt~2e/lp~741~2e/lpt1y~2e/lp~741~2e')
        self.hybridencode(b'data/lpt9./lpt9y./lpt9.',
                          b'data/lp~749~2e/lpt9y~2e/lp~749~2e')
        self.hybridencode(b'data/com./com1./com1y./com1.',
                          b'data/com~2e/co~6d1~2e/com1y~2e/co~6d1~2e')
        self.hybridencode(b'data/com9./com9y./com9.',
                          b'data/co~6d9~2e/com9y~2e/co~6d9~2e')
        self.hybridencode(b'data/a /au /aux /auxy /aux ',
                          b'data/a~20/au~20/aux~20/auxy~20/aux~20')

    def testhashingboundarycases(self):
        # largest unhashed path
        self.hybridencode(
            (b'data/123456789-123456789-123456789-123456789-123456789-unhashed'
             b'--xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-123456789-12345'),
            (b'data/123456789-123456789-123456789-123456789-123456789-unhashed'
             b'--xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-123456789-12345'))
        # shortest hashed path
        self.hybridencode(
            (b'data/123456789-123456789-123456789-123456789-123456789-hashed'
             b'----xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-123456789-123456'),
            (b'dh/123456789-123456789-123456789-123456789-123456789-hashed---'
             b'-xxxxxxxxx-xxxxxxxe9c55002b50bf5181e7a6fc1f60b126e2a6fcf71'))

    def testhashing(self):
        # changing one char in part that's hashed away produces a different hash
        self.hybridencode(
            (b'data/123456789-123456789-123456789-123456789-123456789-hashed'
             b'----xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-xxxxxxxxy-123456789-123456'),
            (b'dh/123456789-123456789-123456789-123456789-123456789-hashed---'
             b'-xxxxxxxxx-xxxxxxxd24fa4455faf8a94350c18e5eace7c2bb17af706'))
        # uppercase hitting length limit due to encoding
        self.hybridencode(
            (b'data/A23456789-123456789-123456789-123456789-123456789-'
             b'xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-'
             b'123456789-12345'),
            (b'dh/a23456789-123456789-123456789-123456789-123456789-'
             b'xxxxxxxxx-xxxxxxxxx-xxxxxxx'
             b'cbbc657029b41b94ed510d05feb6716a5c03bc6b'))
        self.hybridencode(
            (b'data/Z23456789-123456789-123456789-123456789-123456789-'
             b'xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-'
             b'123456789-12345'),
            (b'dh/z23456789-123456789-123456789-123456789-123456789-xxxxxxxxx'
             b'-xxxxxxxxx-xxxxxxx938f32a725c89512833fb96b6602dd9ebff51ddd'))
        # compare with lowercase not hitting limit
        self.hybridencode(
            (b'data/a23456789-123456789-123456789-123456789-123456789-'
             b'xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-123456789-'
             b'12345'),
            (b'data/a23456789-123456789-123456789-123456789-123456789-'
             b'xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-123456789-'
             b'12345'))
        self.hybridencode(
            (b'data/z23456789-123456789-123456789-123456789-123456789'
             b'-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-123456789'
             b'-12345'),
            (b'data/z23456789-123456789-123456789-123456789-123456789'
             b'-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-123456789-'
             b'12345'))
        # not hitting limit with any of these
        self.hybridencode(
            (b'data/abcdefghijklmnopqrstuvwxyz0123456789 !#%&\'()+,-.;=[]^`{}'
             b'xxx-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-123456789-12345'),
            (b'data/abcdefghijklmnopqrstuvwxyz0123456789 !#%&\'()+,-.;=[]^`{}'
             b'xxx-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-123456789-12345'))
        # underbar hitting length limit due to encoding
        self.hybridencode(
            (b'data/_23456789-123456789-123456789-123456789-123456789-'
             b'xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-123456789-'
             b'12345'),
            (b'dh/_23456789-123456789-123456789-123456789-123456789-xxxxxxxxx-'
             b'xxxxxxxxx-xxxxxxx9921a01af50feeabc060ce00eee4cba6efc31d2b'))

        # tilde hitting length limit due to encoding
        self.hybridencode(
            (b'data/~23456789-123456789-123456789-123456789-123456789-'
             b'xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-123456789-'
             b'12345'),
            (b'dh/~7e23456789-123456789-123456789-123456789-123456789'
             b'-xxxxxxxxx-xxxxxxxxx-xxxxx'
             b'9cec6f97d569c10995f785720044ea2e4227481b'))

    def testwinreservedoverlimit(self):
        # Windows reserved characters hitting length limit
        self.hybridencode(
            (b'data/<23456789-123456789-123456789-123456789-123456789'
             b'-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx'
             b'-123456789-12345'),
            (b'dh/~3c23456789-123456789-123456789-123456789-123456789'
             b'-xxxxxxxxx-xxxxxxxxx-xxxxxee'
             b'67d8f275876ca1ef2500fc542e63c885c4e62d'))
        self.hybridencode(
            (b'data/>23456789-123456789-123456789-123456789-123456789-'
             b'xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-'
             b'123456789-12345'),
            (b'dh/~3e23456789-123456789-123456789-123456789-123456789'
             b'-xxxxxxxxx-xxxxxxxxx-xxxxx'
             b'387a85a5b1547cc9136310c974df716818458ddb'))
        self.hybridencode(
            (b'data/:23456789-123456789-123456789-123456789-123456789'
             b'-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-'
             b'123456789-12345'),
            (b'dh/~3a23456789-123456789-123456789-123456789-123456789'
             b'-xxxxxxxxx-xxxxxxxxx-xxxxx'
             b'2e4154fb571d13d22399c58cc4ef4858e4b75999'))
        self.hybridencode(
            (b'data/"23456789-123456789-123456789-123456789-123456789'
             b'-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx'
             b'-123456789-12345'),
            (b'dh/~2223456789-123456789-123456789-123456789-123456789'
             b'-xxxxxxxxx-xxxxxxxxx-xxxxx'
             b'fc7e3ec7b0687ee06ed8c32fef0eb0c1980259f5'))
        self.hybridencode(
            (b'data/\\23456789-123456789-123456789-123456789-123456789'
             b'-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-'
             b'123456789-12345'),
            (b'dh/~5c23456789-123456789-123456789-123456789-123456789'
             b'-xxxxxxxxx-xxxxxxxxx-xxxxx'
             b'944e1f2b7110687e116e0d151328ac648b06ab4a'))
        self.hybridencode(
            (b'data/|23456789-123456789-123456789-123456789-123456789'
             b'-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx'
             b'-123456789-12345'),
            (b'dh/~7c23456789-123456789-123456789-123456789-123456789'
             b'-xxxxxxxxx-xxxxxxxxx-xxxxx'
             b'28b23dd3fd0242946334126ab62bcd772aac32f4'))
        self.hybridencode(
            (b'data/?23456789-123456789-123456789-123456789-123456789'
             b'-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx'
             b'-123456789-12345'),
            (b'dh/~3f23456789-123456789-123456789-123456789-123456789'
             b'-xxxxxxxxx-xxxxxxxxx-xxxxx'
             b'a263022d3994d2143d98f94f431eef8b5e7e0f8a'))
        self.hybridencode(
            (b'data/*23456789-123456789-123456789-123456789-123456789'
             b'-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-'
             b'123456789-12345'),
            (b'dh/~2a23456789-123456789-123456789-123456789-123456789'
             b'-xxxxxxxxx-xxxxxxxxx-xxxxx'
             b'0e7e6020e3c00ba7bb7893d84ca2966fbf53e140'))

    def testinitialspacelenlimit(self):
        # initial space hitting length limit
        self.hybridencode(
            (b'data/ 23456789-123456789-123456789-123456789-123456789'
             b'-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-'
             b'123456789-12345'),
            (b'dh/~2023456789-123456789-123456789-123456789-123456789'
             b'-xxxxxxxxx-xxxxxxxxx-xxxxx'
             b'92acbc78ef8c0b796111629a02601f07d8aec4ea'))

    def testinitialdotlenlimit(self):
        # initial dot hitting length limit
        self.hybridencode(
            (b'data/.23456789-123456789-123456789-123456789-123456789'
             b'-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx'
             b'-123456789-12345'),
            (b'dh/~2e23456789-123456789-123456789-123456789-123456789'
             b'-xxxxxxxxx-xxxxxxxxx-xxxxx'
             b'dbe19cc6505b3515ab9228cebf877ad07075168f'))

    def testtrailingspacelenlimit(self):
        # trailing space in filename hitting length limit
        self.hybridencode(
            (b'data/123456789-123456789-123456789-123456789-123456789'
             b'-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-'
             b'123456789-1234 '),
            (b'dh/123456789-123456789-123456789-123456789-123456789'
             b'-xxxxxxxxx-xxxxxxxxx-xxxxxxx'
             b'0025dc73e04f97426db4893e3bf67d581dc6d066'))

    def testtrailingdotlenlimit(self):
        # trailing dot in filename hitting length limit
        self.hybridencode(
            (b'data/123456789-123456789-123456789-123456789-123456789'
             b'-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-123456789-'
             b'1234.'),
            (b'dh/123456789-123456789-123456789-123456789-123456789'
             b'-xxxxxxxxx-xxxxxxxxx-xxxxxxx'
             b'85a16cf03ee7feba8a5abc626f1ba9886d01e89d'))

    def testinitialspacedirlenlimit(self):
        # initial space in directory hitting length limit
        self.hybridencode(
            (b'data/ x/456789-123456789-123456789-123456789-123456789'
             b'-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx'
             b'-123456789-12345'),
            (b'dh/~20x/456789-123456789-123456789-123456789-123456789'
             b'-xxxxxxxxx-xxxxxxxxx-xxxxx'
             b'1b3a3b712b2ac00d6af14ae8b4c14fdbf904f516'))

    def testinitialdotdirlenlimit(self):
        # initial dot in directory hitting length limit
        self.hybridencode(
            (b'data/.x/456789-123456789-123456789-123456789-123456789'
             b'-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx'
             b'-123456789-12345'),
            (b'dh/~2ex/456789-123456789-123456789-123456789-123456789'
             b'-xxxxxxxxx-xxxxxxxxx-xxxxx'
             b'39dbc4c193a5643a8936fc69c3363cd7ac91ab14'))

    def testtrailspacedirlenlimit(self):
        # trailing space in directory hitting length limit
        self.hybridencode(
            (b'data/x /456789-123456789-123456789-123456789-123456789'
             b'-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx'
             b'-123456789-12345'),
            (b'dh/x~20/456789-123456789-123456789-123456789-123456789'
             b'-xxxxxxxxx-xxxxxxxxx-xxxxx'
             b'2253c341df0b5290790ad312cd8499850f2273e5'))

    def testtrailingdotdirlenlimit(self):
        # trailing dot in directory hitting length limit
        self.hybridencode(
            (b'data/x./456789-123456789-123456789-123456789-123456789'
             b'-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-'
             b'123456789-12345'),
            (b'dh/x~2e/456789-123456789-123456789-123456789-123456789'
             b'-xxxxxxxxx-xxxxxxxxx-xxxxx'
             b'cc0324d696d34562b44b5138db08ee1594ccc583'))

    def testdirencodinglenlimit(self):
        # with directories that need direncoding, hitting length limit
        self.hybridencode(
            (b'data/x.i/56789-123456789-123456789-123456789-123456789'
             b'-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-123456789-'
             b'12345'),
            (b'dh/x.i.hg/56789-123456789-123456789-123456789-123456789'
             b'-xxxxxxxxx-xxxxxxxxx-xxxx'
             b'a4c4399bdf81c67dbbbb7060aa0124d8dea94f74'))
        self.hybridencode(
            (b'data/x.d/56789-123456789-123456789-123456789-123456789'
             b'-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx'
             b'-123456789-12345'),
            (b'dh/x.d.hg/56789-123456789-123456789-123456789-123456789'
             b'-xxxxxxxxx-xxxxxxxxx-xxxx'
             b'1303fa90473b230615f5b3ea7b660e881ae5270a'))
        self.hybridencode(
            (b'data/x.hg/5789-123456789-123456789-123456789-123456789'
             b'-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx'
             b'-123456789-12345'),
            (b'dh/x.hg.hg/5789-123456789-123456789-123456789-123456789'
             b'-xxxxxxxxx-xxxxxxxxx-xxxx'
             b'26d724a8af68e7a4e4455e6602ea9adbd0eb801f'))

    def testwinreservedfilenameslimit(self):
        # Windows reserved filenames, hitting length limit
        self.hybridencode(
            (b'data/con/56789-123456789-123456789-123456789-123456789'
             b'-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-'
             b'123456789-12345'),
            (b'dh/co~6e/56789-123456789-123456789-123456789-123456789'
             b'-xxxxxxxxx-xxxxxxxxx-xxxxx'
             b'c0794d4f4c605a2617900eb2563d7113cf6ea7d3'))
        self.hybridencode(
            (b'data/prn/56789-123456789-123456789-123456789-123456789'
             b'-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx'
             b'-123456789-12345'),
            (b'dh/pr~6e/56789-123456789-123456789-123456789-123456789'
             b'-xxxxxxxxx-xxxxxxxxx-xxxxx'
             b'64db876e1a9730e27236cb9b167aff942240e932'))
        self.hybridencode(
            (b'data/aux/56789-123456789-123456789-123456789-123456789'
             b'-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx'
             b'-123456789-12345'),
            (b'dh/au~78/56789-123456789-123456789-123456789-123456789'
             b'-xxxxxxxxx-xxxxxxxxx-xxxxx'
             b'8a178558405ca6fb4bbd75446dfa186f06751a0d'))
        self.hybridencode(
            (b'data/nul/56789-123456789-123456789-123456789-123456789'
             b'-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx'
             b'-123456789-12345'),
            (b'dh/nu~6c/56789-123456789-123456789-123456789-123456789'
             b'-xxxxxxxxx-xxxxxxxxx-xxxxx'
             b'c5e51b6fec1bd07bd243b053a0c3f7209855b886'))
        self.hybridencode(
            (b'data/com1/6789-123456789-123456789-123456789-123456789'
             b'-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx'
             b'-123456789-12345'),
            (b'dh/co~6d1/6789-123456789-123456789-123456789-123456789'
             b'-xxxxxxxxx-xxxxxxxxx-xxxxx'
             b'32f5f44ece3bb62b9327369ca84cc19c86259fcd'))
        self.hybridencode(
            (b'data/com9/6789-123456789-123456789-123456789-123456789'
             b'-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx'
             b'-123456789-12345'),
            (b'dh/co~6d9/6789-123456789-123456789-123456789-123456789'
             b'-xxxxxxxxx-xxxxxxxxx-xxxxx'
             b'734360b28c66a3230f55849fe8926206d229f990'))
        self.hybridencode(
            (b'data/lpt1/6789-123456789-123456789-123456789-123456789'
             b'-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx'
             b'-123456789-12345'),
            (b'dh/lp~741/6789-123456789-123456789-123456789-123456789'
             b'-xxxxxxxxx-xxxxxxxxx-xxxxx'
             b'e6f16ab4b6b0637676b2842b3345c9836df46ef7'))
        self.hybridencode(
            (b'data/lpt9/6789-123456789-123456789-123456789-123456789'
             b'-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx'
             b'-123456789-12345'),
            (b'dh/lp~749/6789-123456789-123456789-123456789-123456789'
             b'-xxxxxxxxx-xxxxxxxxx-xxxxx'
             b'a475814c51acead3e44f2ff801f0c4903f986157'))

    def testnonreservednolimit(self):
        # non-reserved names, just not hitting limit
        self.hybridencode(
            (b'data/123456789-123456789-123456789-123456789-123456789-'
             b'/com/com0/lpt/lpt0/'
             b'-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-123456789-12345'),
            (b'data/123456789-123456789-123456789-123456789-123456789-'
             b'/com/com0/lpt/lpt0/'
             b'-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-123456789-12345'))

    def testhashedpathuntrucfirst(self):
        # hashed path with largest untruncated 1st dir
        self.hybridencode(
            (b'data/12345678/-123456789-123456789-123456789-123456789-hashed'
             b'----xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-123456789-123456'),
            (b'dh/12345678/-123456789-123456789-123456789-123456789-hashed'
             b'----xxxxxxxxx-xxxxxxx4e9e9e384d00929a93b6835fbf976eb32321ff3c'))

    def testhashedpathsmallesttrucdir(self):
        # hashed path with smallest truncated 1st dir
        self.hybridencode(
            (b'data/123456789/123456789-123456789-123456789-123456789-hashed'
             b'----xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-123456789-123456'),
            (b'dh/12345678/123456789-123456789-123456789-123456789-hashed'
             b'----xxxxxxxxx-xxxxxxxx1f4e4ec5f2be76e109bfaa8e31c062fe426d5490'))

    def testhashedlargesttwountruc(self):
        # hashed path with largest untruncated two dirs
        self.hybridencode(
            (b'data/12345678/12345678/9-123456789-123456789-123456789-hashed'
             b'----xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-123456789-123456'),
            (b'dh/12345678/12345678/9-123456789-123456789-123456789-hashed'
             b'----xxxxxxxxx-xxxxxxx3332d8329d969cf835542a9f2cbcfb385b6cf39d'))

    def testhashedpathsmallesttrunctwodirs(self):
        # hashed path with smallest truncated two dirs
        self.hybridencode(
            (b'data/123456789/123456789/123456789-123456789-123456789-hashed'
             b'----xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-123456789-123456'),
            (b'dh/12345678/12345678/123456789-123456789-123456789-hashed'
             b'----xxxxxxxxx-xxxxxxxxx'
             b'9699559798247dffa18717138859be5f8874840e'))

    def testhashuntruncthree(self):
        # hashed path with largest untruncated three dirs
        self.hybridencode(
            (b'data/12345678/12345678/12345678/89-123456789-123456789-'
             b'hashed----xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-'
             b'123456789-123456'),
            (b'dh/12345678/12345678/12345678/89-123456789-123456789-hashed'
             b'----xxxxxxxxx-xxxxxxxf0a2b053bb1369cce02f78c217d6a7aaea18c439'))

    def testhashtruncthree(self):
        # hashed path with smallest truncated three dirs
        self.hybridencode(
            (b'data/123456789/123456789/123456789/123456789-123456789-hashed'
             b'----xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-123456789-123456'),
            (b'dh/12345678/12345678/12345678/123456789-123456789-hashed'
             b'----xxxxxxxxx-xxxxxxxxx-'
             b'1c6f8284967384ec13985a046d3553179d9d03cd'))

    def testhashuntrucfour(self):
        # hashed path with largest untruncated four dirs
        self.hybridencode(
            (b'data/12345678/12345678/12345678/12345678/789-123456789-hashed'
             b'----xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-123456789-123456'),
            (b'dh/12345678/12345678/12345678/12345678/789-123456789-hashed'
             b'----xxxxxxxxx-xxxxxxx0d30c99049d8f0ff97b94d4ef302027e8d54c6fd'))

    def testhashtruncfour(self):
        # hashed path with smallest truncated four dirs
        self.hybridencode(
            (b'data/123456789/123456789/123456789/123456789/123456789-hashed'
             b'----xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-123456789-123456'),
            (b'dh/12345678/12345678/12345678/12345678/123456789-hashed'
             b'----xxxxxxxxx-xxxxxxxxx-x'
             b'46162779e1a771810b37a737f82ae7ed33771402'))

    def testhashuntruncfive(self):
        # hashed path with largest untruncated five dirs
        self.hybridencode(
            (b'data/12345678/12345678/12345678/12345678/12345678/6789-hashed'
             b'----xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-123456789-123456'),
            (b'dh/12345678/12345678/12345678/12345678/12345678/6789-hashed'
             b'----xxxxxxxxx-xxxxxxxbfe752ddc8b003c2790c66a9f2eb1ea75c114390'))

    def testhashtruncfive(self):
        # hashed path with smallest truncated five dirs
        self.hybridencode(
            (b'data/123456789/123456789/123456789/123456789/123456789/hashed'
             b'----xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-123456789-123456'),
            (b'dh/12345678/12345678/12345678/12345678/12345678/hashed'
             b'----xxxxxxxxx-xxxxxxxxx-xx'
             b'b94c27b3532fa880cdd572b1c514785cab7b6ff2'))

    def testhashuntruncsix(self):
        # hashed path with largest untruncated six dirs
        self.hybridencode(
            (b'data/12345678/12345678/12345678/12345678/12345678/12345678/'
             b'ed----xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-123456789-123456'),
            (b'dh/12345678/12345678/12345678/12345678/12345678/12345678/'
             b'ed----xxxxxxxxx-xxxxxxx'
             b'cd8cc5483a0f3be409e0e5d4bf9e36e113c59235'))

    def testhashtruncsix(self):
        # hashed path with smallest truncated six dirs
        self.hybridencode(
            (b'data/123456789/123456789/123456789/123456789/123456789/'
              b'123456789/xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-'
              b'123456789-123456'),
            (b'dh/12345678/12345678/12345678/12345678/12345678/12345678/'
             b'xxxxxxxxx-xxxxxxxxx-xxx'
             b'47dd6f616f833a142da00701b334cebbf640da06'))

    def testhashuntrunc7(self):
        # hashed path with largest untruncated seven dirs
        self.hybridencode(
            (b'data/12345678/12345678/12345678/12345678/12345678/12345678'
             b'/12345678/xxxxxx-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-'
             b'123456789-123456'),
            (b'dh/12345678/12345678/12345678/12345678/12345678/12345678'
             b'/12345678/xxxxxx-xxxxxxx'
             b'1c8ed635229fc22efe51035feeadeb4c8a0ecb82'))

    def testhashtrunc7(self):
        # hashed path with smallest truncated seven dirs
        self.hybridencode(
            (b'data/123456789/123456789/123456789/123456789/123456789/'
              b'123456789/123456789/'
              b'xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-123456789-123456'),
            (b'dh/12345678/12345678/12345678/12345678/12345678/12345678/123'
             b'45678/xxxxxxxxx-xxxx298ff7d33f8ce6db57930837ffea2fb2f48bb926'))

    def testhashuntrunc8(self):
        # hashed path with largest untruncated eight dirs
        # (directory 8 is dropped because it hits _maxshortdirslen)
        self.hybridencode(
            (b'data/12345678/12345678/12345678/12345678/12345678/12345678/'
             b'12345678/12345678/xxxxxxx-xxxxxxxxx-xxxxxxxxx-123456789-123456'),
            (b'dh/12345678/12345678/12345678/12345678/12345678/12345678/1'
             b'2345678/xxxxxxx-xxxxxxc8996ccd41b471f768057181a4d59d2febe7277d'))

    def testhashtrunc8(self):
        # hashed path with smallest truncated eight dirs
        # (directory 8 is dropped because it hits _maxshortdirslen)
        self.hybridencode(
            (b'data/123456789/123456789/123456789/123456789/123456789/'
             b'123456789/123456789/123456789/xxxxxxxxx-xxxxxxxxx-'
             b'123456789-123456'),
            (b'dh/12345678/12345678/12345678/12345678/12345678/12345678'
             b'/12345678/xxxxxxxxx-xxxx'
             b'4fa04a839a6bda93e1c21c713f2edcbd16e8890d'))

    def testhashnondropped8(self):
        # hashed path with largest non-dropped directory 8
        # (just not hitting the _maxshortdirslen boundary)
        self.hybridencode(
            (b'data/12345678/12345678/12345678/12345678/12345678/12345678'
             b'/12345678/12345/-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-123456789'
             b'-123456'),
            (b'dh/12345678/12345678/12345678/12345678/12345678/12345678'
             b'/12345678/12345/-xxxxxxx'
             b'4d43d1ccaa20efbfe99ec779dc063611536ff2c5'))
        # ...adding one truncated char to dir 1..7 won't drop dir 8
        self.hybridencode(
            (b'data/12345678x/12345678/12345678/12345678/12345678/12345678'
             b'/12345678/12345/xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-123456789-123456'),
            (b'dh/12345678/12345678/12345678/12345678/12345678/12345678/1234'
             b'5678/12345/xxxxxxxx0f9efce65189cc60fd90fe4ffd49d7b58bbe0f2e'))
        self.hybridencode(
            (b'data/12345678/12345678x/12345678/12345678/12345678/12345678'
             b'/12345678/12345/xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-123456789-123456'),
            (b'dh/12345678/12345678/12345678/12345678/12345678/12345678/1234'
             b'5678/12345/xxxxxxxx945ca395708cafdd54a94501859beabd3e243921'))
        self.hybridencode(
            (b'data/12345678/12345678/12345678x/12345678/12345678/12345678/12'
             b'345678/12345/xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-123456789-123456'),
            (b'dh/12345678/12345678/12345678/12345678/12345678/12345678/1234'
             b'5678/12345/xxxxxxxxac62bf6898c4fd0502146074547c11caa751a327'))
        self.hybridencode(
            (b'data/12345678/12345678/12345678/12345678x/12345678/12345678/12'
             b'345678/12345/xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-123456789-123456'),
            (b'dh/12345678/12345678/12345678/12345678/12345678/12345678/1234'
             b'5678/12345/xxxxxxxx2ae5a2baed7983fae8974d0ca06c6bf08b9aee92'))
        self.hybridencode(
            (b'data/12345678/12345678/12345678/12345678/12345678x/12345678/'
             b'12345678/12345/xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-123456789-123456'),
            (b'dh/12345678/12345678/12345678/12345678/12345678/12345678/1234'
             b'5678/12345/xxxxxxxx214aba07b6687532a43d1e9eaf6e88cfca96b68c'))
        self.hybridencode(
            (b'data/12345678/12345678/12345678/12345678/12345678/12345678x'
             b'/12345678/12345/xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-123456789-123456'),
            (b'dh/12345678/12345678/12345678/12345678/12345678/12345678/1234'
             b'5678/12345/xxxxxxxxe7a022ae82f0f55cf4e0498e55ba59ea4ebb55bf'))
        self.hybridencode(
            (b'data/12345678/12345678/12345678/12345678/12345678/12345678/'
             b'12345678x/12345/xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-123456789-123456'),
            (b'dh/12345678/12345678/12345678/12345678/12345678/12345678/12345'
             b'678/12345/xxxxxxxxb51ce61164996a80f36ce3cfe64b62d519aedae3'))

    def testhashedpathshortestdropped8(self):
        # hashed path with shortest dropped directory 8
        # (just hitting the _maxshortdirslen boundary)
        self.hybridencode(
            (b'data/12345678/12345678/12345678/12345678/12345678/12345678'
             b'/12345678/123456/xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-'
             b'123456789-123456'),
            (b'dh/12345678/12345678/12345678/12345678/12345678/12345678'
             b'/12345678/xxxxxxxxx-xxxx'
             b'11fa9873cc6c3215eae864528b5530a04efc6cfe'))

    def testhashedpathdropsdir8fortrailingdotspace(self):
        # hashed path that drops dir 8 due to dot or space at end is
        # encoded, and thus causing to hit _maxshortdirslen
        self.hybridencode(
            (b'data/12345678/12345678/12345678/12345678/12345678/12345678'
             b'/12345678/1234./-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-'
             b'123456789-123456'),
            (b'dh/12345678/12345678/12345678/12345678/12345678/12345678'
             b'/12345678/-xxxxxxxxx-xxx'
             b'602df9b45bec564e2e1f0645d5140dddcc76ed58'))
        self.hybridencode(
            (b'data/12345678/12345678/12345678/12345678/12345678/12345678'
             b'/12345678/1234 /-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-'
             b'123456789-123456'),
            (b'dh/12345678/12345678/12345678/12345678/12345678/12345678'
             b'/12345678/-xxxxxxxxx-xxx'
             b'd99ff212bc84b4d1f70cd6b0071e3ef69d4e12ce'))
        # ... with dir 8 short enough for encoding
        self.hybridencode(
            (b'data/12345678/12345678/12345678/12345678/12345678/12345678'
             b'/12345678/12./xx-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx'
             b'-123456789-123456'),
            (b'dh/12345678/12345678/12345678/12345678/12345678/12345678'
             b'/12345678/12~2e/'
             b'xx-xxxxx7baeb5ed7f14a586ee1cacecdbcbff70032d1b3c'))
        self.hybridencode(
            (b'data/12345678/12345678/12345678/12345678/12345678/12345678'
             b'/12345678/12 '
             b'/xx-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-123456789-123456'),
            (b'dh/12345678/12345678/12345678/12345678/12345678/12345678'
             b'/12345678/12~20/'
             b'xx-xxxxxcf79ca9795f77d7f75745da36807e5d772bd5182'))

    def testextensionsreplicatedonhashedpaths(self):
        # Extensions are replicated on hashed paths. Note that
        # we only get to encode files that end in .i or .d inside the
        # store. Encoded filenames are thus bound in length.
        self.hybridencode(
            (b'data/12345678/12345678/12345678/12345678/12345678/12345678/'
             b'12345678/12345/-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-123456789-12.3'
             b'45.i'),
            (b'dh/12345678/12345678/12345678/12345678/12345678/12345678/12'
             b'345678/12345/-xxxxxc10ad03b5755ed524f5286aab1815dfe07729438.i'))
        self.hybridencode(
            (b'data/12345678/12345678/12345678/12345678/12345678/12345678/'
             b'12345678/12345/-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-123456789-12.3'
             b'45.d'),
            (b'dh/12345678/12345678/12345678/12345678/12345678/12345678/12'
             b'345678/12345/-xxxxx9eec83381f2b39ef5ac8b4ecdf2c94f7983f57c8.d'))
        self.hybridencode(
            (b'data/12345678/12345678/12345678/12345678/12345678/12345678/'
             b'12345678/12345/-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-123456789-12.3'
             b'456.i'),
            (b'dh/12345678/12345678/12345678/12345678/12345678/12345678/12'
             b'345678/12345/-xxxxxb7796dc7d175cfb0bb8a7728f58f6ebec9042568.i'))
        self.hybridencode(
            (b'data/12345678/12345678/12345678/12345678/12345678/12345678/'
             b'12345678/12345/-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-123456789-12.3'
             b'4567.i'),
            (b'dh/12345678/12345678/12345678/12345678/12345678/12345678/12'
             b'345678/12345/-xxxxxb515857a6bfeef017c4894d8df42458ac65d55b8.i'))
        self.hybridencode(
            (b'data/12345678/12345678/12345678/12345678/12345678/12345678/'
             b'12345678/12345/-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-123456789-12.3'
             b'45678.i'),
            (b'dh/12345678/12345678/12345678/12345678/12345678/12345678/12'
             b'345678/12345/-xxxxxb05a0f247bc0a776211cd6a32ab714fd9cc09f2b.i'))
        self.hybridencode(
            (b'data/12345678/12345678/12345678/12345678/12345678/12345678/'
             b'12345678/12345/-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-123456789-12.3'
             b'456789.i'),
            (b'dh/12345678/12345678/12345678/12345678/12345678/12345678/12'
             b'345678/12345/-xxxxxf192b48bff08d9e0e12035fb52bc58c70de72c94.i'))
        self.hybridencode(
            (b'data/12345678/12345678/12345678/12345678/12345678/12345678/'
             b'12345678/12345/-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-123456789-12.3'
             b'456789-.i'),
            (b'dh/12345678/12345678/12345678/12345678/12345678/12345678/12'
             b'345678/12345/-xxxxx435551e0ed4c7b083b9ba83cee916670e02e80ad.i'))
        self.hybridencode(
            (b'data/12345678/12345678/12345678/12345678/12345678/12345678/'
             b'12345678/12345/-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-123456789-12.3'
             b'456789-1.i'),
            (b'dh/12345678/12345678/12345678/12345678/12345678/12345678/12'
             b'345678/12345/-xxxxxa7f74eb98d8d58b716356dfd26e2f9aaa65d6a9a.i'))
        self.hybridencode(
            (b'data/12345678/12345678/12345678/12345678/12345678/12345678/'
             b'12345678/12345/-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-123456789-12.3'
             b'456789-12.i'),
            (b'dh/12345678/12345678/12345678/12345678/12345678/12345678/12'
             b'345678/12345/-xxxxxed68d9bd43b931f0b100267fee488d65a0c66f62.i'))
        self.hybridencode(
            (b'data/12345678/12345678/12345678/12345678/12345678/12345678/'
             b'12345678/12345/-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-123456789-12.3'
             b'456789-123.i'),
            (b'dh/12345678/12345678/12345678/12345678/12345678/12345678/12'
             b'345678/12345/-xxxxx5cea44de2b642d2ba2b4a30693ffb1049644d698.i'))
        self.hybridencode(
            (b'data/12345678/12345678/12345678/12345678/12345678/12345678/'
             b'12345678/12345/-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-123456789-12.3'
             b'456789-1234.i'),
            (b'dh/12345678/12345678/12345678/12345678/12345678/12345678/12'
             b'345678/12345/-xxxxx68462f62a7f230b39c1b5400d73ec35920990b7e.i'))
        self.hybridencode(
            (b'data/12345678/12345678/12345678/12345678/12345678/12345678/'
             b'12345678/12345/-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-123456789-12.3'
             b'456789-12345.i'),
            (b'dh/12345678/12345678/12345678/12345678/12345678/12345678/12'
             b'345678/12345/-xxxxx4cb852a314c6da240a83eec94761cdd71c6ec22e.i'))
        self.hybridencode(
            (b'data/12345678/12345678/12345678/12345678/12345678/12345678/'
             b'12345678/12345/-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-123456789-12.3'
             b'456789-12345-ABCDEFGHIJKLMNOPRSTUVWXYZ-'
             b'abcdefghjiklmnopqrstuvwxyz-ABCDEFGHIJKLMNOPRSTUVWXYZ'
             b'-1234567890-xxxxxxxxx-xxxxxxxxx-xxxxxxxx'
             b'-xxxxxxxxx-wwwwwwwww-wwwwwwwww-wwwwwwwww-wwwwwwwww'
             b'-wwwwwwwww-wwwwwwwww-wwwwwwwww-wwwwwwwww-wwwwwwwww.i'),
            (b'dh/12345678/12345678/12345678/12345678/12345678/12345678/12'
             b'345678/12345/-xxxxx93352aa50377751d9e5ebdf52da1e6e69a6887a6.i'))

    def testpathsoutsidedata(self):
        # paths outside data/ can be encoded
        self.hybridencode(b'metadata/dir/00manifest.i',
                          b'metadata/dir/00manifest.i')
        self.hybridencode(
            (b'metadata/12345678/12345678/12345678/12345678/12345678'
             b'/12345678/12345678/12345678/12345678/12345678/12345678'
             b'/12345678/12345678/00manifest.i'),
            (b'dh/ata/12345678/12345678/12345678/12345678/12345678'
             b'/12345678/12345678/00manife'
             b'0a4da1f89aa2aa9eb0896eb451288419049781b4.i'))

if __name__ == '__main__':
    import silenttestrunner
    silenttestrunner.main(__name__)