Mercurial > hg
annotate contrib/tcsh_completion @ 39772:ae531f5e583c
testing: add interface unit tests for file storage
Our strategy for supporting alternate storage backends is to define
interfaces for everything then "code to the interface."
We already have interfaces for various primitives, including file
and manifest storage.
What we don't have is generic unit tests for those interfaces. Up
to this point we've been relying on high-level integration tests
(mainly in the form of existing .t tests) to test alternate storage
backends. And my experience with developing the "simple store" test
extension is that such testing is very tedious: it takes several
minutes to run all tests and when you find a failure, it is often
non-trivial to debug.
This commit starts to change that.
This commit introduces the mercurial.testing.storage module. It
contains testing code for storage. Currently, it defines some
unittest.TestCase classes for testing the file storage interfaces.
It also defines some factory functions that allow a caller to easily
spawn a custom TestCase "bound" to a specific file storage backend
implementation.
A new .py test has been added. It simply defines a callable to produce
filelog and transaction instances on demand and then "registers" the
various test classes so the filelog class can be tested with the
storage interface unit tests.
As part of writing the tests, I identified a couple of apparent
bugs in revlog.py and filelog.py! These are tracked with inline
TODO comments.
Writing the tests makes it more obvious where the storage interface
is lacking. For example, we raise either IndexError or
error.LookupError for missing revisions depending on whether we
use an integer revision or a node. Also, we raise error.RevlogError
in various places when we should be raising a storage-agnostic
error type.
The storage interfaces are currently far from perfect and there is much
work to be done to improve them. But at least with this commit we
finally have the start of unit tests that can be used to "qualify"
the behavior of a storage backend. And when implementing and debugging
new storage backends, we now have an obvious place to define new
tests and have obvious places to insert breakpoints to facilitate
debugging. This should be invaluable when implementing new storage
backends.
I added the mercurial.testing package because these interface
conformance tests are generic and need to be usable by all storage
backends. Having the code live in tests/ would make it difficult for
storage backends implemented in extensions to test their interface
conformance. First, it would require obtaining a copy of Mercurial's
storage test code in order to test. Second, it would make testing
against multiple Mercurial versions difficult, as you would need to
import N copies of the storage testing code in order to achieve test
coverage. By making the test code part of the Mercurial distribution
itself, extensions can `import mercurial.testing.*` to access and run
the test code. The test will run against whatever Mercurial version
is active.
FWIW I've always wanted to move parts of run-tests.py into the
mercurial.* package to make the testing story simpler (e.g. imagine an
`hg debugruntests` command that could invoke the test harness). While I
have no plans to do that in the near future, establishing the
mercurial.testing package does provide a natural home for that code
should someone do this in the future.
Differential Revision: https://phab.mercurial-scm.org/D4650
author | Gregory Szorc <gregory.szorc@gmail.com> |
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date | Tue, 18 Sep 2018 16:52:11 -0700 |
parents | 2616325766e3 |
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1156 | 1 # |
2 # tcsh completion for Mercurial | |
3 # | |
4 # This file has been auto-generated by tcsh_completion_build.sh for | |
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5 # Mercurial Distributed SCM (version 1.7.5+157-8a220ae0b2ba) |
1156 | 6 # |
7 # Copyright (C) 2005 TK Soh. | |
8 # | |
9 # This is free software; you can redistribute it and/or modify it under | |
10 # the terms of the GNU General Public License as published by the Free | |
11 # Software Foundation; either version 2 of the License, or (at your | |
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12 # option) any later version. |
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14 | |
15 complete hg \ | |
16 'n/--cwd/d/' 'n/-R/d/' 'n/--repository/d/' \ | |
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17 'C/-/( -R --repository \ |
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18 --cwd \ |
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19 -y --noninteractive \ |
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20 -q --quiet \ |
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21 -v --verbose \ |
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22 --config \ |
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23 --debug \ |
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24 --debugger \ |
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25 --encoding \ |
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26 --encodingmode \ |
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27 --traceback \ |
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28 --time \ |
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29 --profile \ |
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30 --version \ |
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31 -h --help)/' \ |
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32 'p/1/(add addremove annotate blame archive \ |
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33 backout bisect bookmarks branch branches \ |
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34 bundle cat clone commit ci \ |
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35 copy cp debugancestor debugbuilddag debugcheckstate \ |
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36 debugcommands debugcomplete debugdag debugdata debugdate \ |
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37 debugfsinfo debugignore debugindex debugindexdot debuginstall \ |
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38 debugpushkey debugrebuildstate debugrename debugrevspec debugsetparents \ |
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39 debugstate debugsub debugwalk diff export \ |
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40 forget grep heads help identify \ |
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41 id import patch incoming in \ |
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42 init locate log history manifest \ |
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43 merge outgoing out parents paths \ |
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44 pull push recover remove rm \ |
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45 rename move mv resolve revert \ |
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46 rollback root serve showconfig debugconfig \ |
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47 status st summary sum tag \ |
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48 tags tip unbundle update up \ |
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49 checkout co verify version)/' |
1156 | 50 |