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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>
date Tue, 18 Sep 2018 16:52:11 -0700
parents 4bd6e444c76f
children 393e44324037
line wrap: on
line source

#require no-reposimplestore no-chg

Set up a server

  $ hg init server
  $ cd server
  $ cat >> .hg/hgrc << EOF
  > [extensions]
  > clonebundles =
  > EOF

  $ touch foo
  $ hg -q commit -A -m 'add foo'
  $ touch bar
  $ hg -q commit -A -m 'add bar'

  $ hg serve -d -p $HGPORT --pid-file hg.pid --accesslog access.log
  $ cat hg.pid >> $DAEMON_PIDS
  $ cd ..

Missing manifest should not result in server lookup

  $ hg --verbose clone -U http://localhost:$HGPORT no-manifest
  requesting all changes
  adding changesets
  adding manifests
  adding file changes
  added 2 changesets with 2 changes to 2 files
  new changesets 53245c60e682:aaff8d2ffbbf

  $ cat server/access.log
  * - - [*] "GET /?cmd=capabilities HTTP/1.1" 200 - (glob)
  $LOCALIP - - [$LOGDATE$] "GET /?cmd=batch HTTP/1.1" 200 - x-hgarg-1:cmds=heads+%3Bknown+nodes%3D x-hgproto-1:0.1 0.2 comp=$USUAL_COMPRESSIONS$ partial-pull (glob)
  $LOCALIP - - [$LOGDATE$] "GET /?cmd=getbundle HTTP/1.1" 200 - x-hgarg-1:bookmarks=1&$USUAL_BUNDLE_CAPS$&cg=1&common=0000000000000000000000000000000000000000&heads=aaff8d2ffbbf07a46dd1f05d8ae7877e3f56e2a2&listkeys=bookmarks&phases=1 x-hgproto-1:0.1 0.2 comp=$USUAL_COMPRESSIONS$ partial-pull (glob)

Empty manifest file results in retrieval
(the extension only checks if the manifest file exists)

  $ touch server/.hg/clonebundles.manifest
  $ hg --verbose clone -U http://localhost:$HGPORT empty-manifest
  no clone bundles available on remote; falling back to regular clone
  requesting all changes
  adding changesets
  adding manifests
  adding file changes
  added 2 changesets with 2 changes to 2 files
  new changesets 53245c60e682:aaff8d2ffbbf

Manifest file with invalid URL aborts

  $ echo 'http://does.not.exist/bundle.hg' > server/.hg/clonebundles.manifest
  $ hg clone http://localhost:$HGPORT 404-url
  applying clone bundle from http://does.not.exist/bundle.hg
  error fetching bundle: (.* not known|(\[Errno -?\d+])? No address associated with hostname) (re) (no-windows !)
  error fetching bundle: [Errno 11004] getaddrinfo failed (windows !)
  abort: error applying bundle
  (if this error persists, consider contacting the server operator or disable clone bundles via "--config ui.clonebundles=false")
  [255]

Server is not running aborts

  $ echo "http://localhost:$HGPORT1/bundle.hg" > server/.hg/clonebundles.manifest
  $ hg clone http://localhost:$HGPORT server-not-runner
  applying clone bundle from http://localhost:$HGPORT1/bundle.hg
  error fetching bundle: (.* refused.*|Protocol not supported|(.* )?Cannot assign requested address) (re)
  abort: error applying bundle
  (if this error persists, consider contacting the server operator or disable clone bundles via "--config ui.clonebundles=false")
  [255]

Server returns 404

  $ "$PYTHON" $TESTDIR/dumbhttp.py -p $HGPORT1 --pid http.pid
  $ cat http.pid >> $DAEMON_PIDS
  $ hg clone http://localhost:$HGPORT running-404
  applying clone bundle from http://localhost:$HGPORT1/bundle.hg
  HTTP error fetching bundle: HTTP Error 404: File not found
  abort: error applying bundle
  (if this error persists, consider contacting the server operator or disable clone bundles via "--config ui.clonebundles=false")
  [255]

We can override failure to fall back to regular clone

  $ hg --config ui.clonebundlefallback=true clone -U http://localhost:$HGPORT 404-fallback
  applying clone bundle from http://localhost:$HGPORT1/bundle.hg
  HTTP error fetching bundle: HTTP Error 404: File not found
  falling back to normal clone
  requesting all changes
  adding changesets
  adding manifests
  adding file changes
  added 2 changesets with 2 changes to 2 files
  new changesets 53245c60e682:aaff8d2ffbbf

Bundle with partial content works

  $ hg -R server bundle --type gzip-v1 --base null -r 53245c60e682 partial.hg
  1 changesets found

We verify exact bundle content as an extra check against accidental future
changes. If this output changes, we could break old clients.

  $ f --size --hexdump partial.hg
  partial.hg: size=207
  0000: 48 47 31 30 47 5a 78 9c 63 60 60 98 17 ac 12 93 |HG10GZx.c``.....|
  0010: f0 ac a9 23 45 70 cb bf 0d 5f 59 4e 4a 7f 79 21 |...#Ep..._YNJ.y!|
  0020: 9b cc 40 24 20 a0 d7 ce 2c d1 38 25 cd 24 25 d5 |..@$ ...,.8%.$%.|
  0030: d8 c2 22 cd 38 d9 24 cd 22 d5 c8 22 cd 24 cd 32 |..".8.$."..".$.2|
  0040: d1 c2 d0 c4 c8 d2 32 d1 38 39 29 c9 34 cd d4 80 |......2.89).4...|
  0050: ab 24 b5 b8 84 cb 40 c1 80 2b 2d 3f 9f 8b 2b 31 |.$....@..+-?..+1|
  0060: 25 45 01 c8 80 9a d2 9b 65 fb e5 9e 45 bf 8d 7f |%E......e...E...|
  0070: 9f c6 97 9f 2b 44 34 67 d9 ec 8e 0f a0 92 0b 75 |....+D4g.......u|
  0080: 41 d6 24 59 18 a4 a4 9a a6 18 1a 5b 98 9b 5a 98 |A.$Y.......[..Z.|
  0090: 9a 18 26 9b a6 19 98 1a 99 99 26 a6 18 9a 98 24 |..&.......&....$|
  00a0: 26 59 a6 25 5a 98 a5 18 a6 24 71 41 35 b1 43 dc |&Y.%Z....$qA5.C.|
  00b0: 16 b2 83 f7 e9 45 8b d2 56 c7 a3 1f 82 52 d7 8a |.....E..V....R..|
  00c0: 78 ed fc d5 76 f1 36 35 dc 05 00 36 ed 5e c7    |x...v.65...6.^.|

  $ echo "http://localhost:$HGPORT1/partial.hg" > server/.hg/clonebundles.manifest
  $ hg clone -U http://localhost:$HGPORT partial-bundle
  applying clone bundle from http://localhost:$HGPORT1/partial.hg
  adding changesets
  adding manifests
  adding file changes
  added 1 changesets with 1 changes to 1 files
  finished applying clone bundle
  searching for changes
  adding changesets
  adding manifests
  adding file changes
  added 1 changesets with 1 changes to 1 files
  new changesets aaff8d2ffbbf
  1 local changesets published

Incremental pull doesn't fetch bundle

  $ hg clone -r 53245c60e682 -U http://localhost:$HGPORT partial-clone
  adding changesets
  adding manifests
  adding file changes
  added 1 changesets with 1 changes to 1 files
  new changesets 53245c60e682

  $ cd partial-clone
  $ hg pull
  pulling from http://localhost:$HGPORT/
  searching for changes
  adding changesets
  adding manifests
  adding file changes
  added 1 changesets with 1 changes to 1 files
  new changesets aaff8d2ffbbf
  (run 'hg update' to get a working copy)
  $ cd ..

Bundle with full content works

  $ hg -R server bundle --type gzip-v2 --base null -r tip full.hg
  2 changesets found

Again, we perform an extra check against bundle content changes. If this content
changes, clone bundles produced by new Mercurial versions may not be readable
by old clients.

  $ f --size --hexdump full.hg
  full.hg: size=442
  0000: 48 47 32 30 00 00 00 0e 43 6f 6d 70 72 65 73 73 |HG20....Compress|
  0010: 69 6f 6e 3d 47 5a 78 9c 63 60 60 d0 e4 76 f6 70 |ion=GZx.c``..v.p|
  0020: f4 73 77 75 0f f2 0f 0d 60 00 02 46 46 76 26 4e |.swu....`..FFv&N|
  0030: c6 b2 d4 a2 e2 cc fc 3c 03 a3 bc a4 e4 8c c4 bc |.......<........|
  0040: f4 d4 62 23 06 06 e6 19 40 f9 4d c1 2a 31 09 cf |..b#....@.M.*1..|
  0050: 9a 3a 52 04 b7 fc db f0 95 e5 a4 f4 97 17 b2 c9 |.:R.............|
  0060: 0c 14 00 02 e6 d9 99 25 1a a7 a4 99 a4 a4 1a 5b |.......%.......[|
  0070: 58 a4 19 27 9b a4 59 a4 1a 59 a4 99 a4 59 26 5a |X..'..Y..Y...Y&Z|
  0080: 18 9a 18 59 5a 26 1a 27 27 25 99 a6 99 1a 70 95 |...YZ&.''%....p.|
  0090: a4 16 97 70 19 28 18 70 a5 e5 e7 73 71 25 a6 a4 |...p.(.p...sq%..|
  00a0: 28 00 19 20 17 af fa df ab ff 7b 3f fb 92 dc 8b |(.. ......{?....|
  00b0: 1f 62 bb 9e b7 d7 d9 87 3d 5a 44 89 2f b0 99 87 |.b......=ZD./...|
  00c0: ec e2 54 63 43 e3 b4 64 43 73 23 33 43 53 0b 63 |..TcC..dCs#3CS.c|
  00d0: d3 14 23 03 a0 fb 2c 2c 0c d3 80 1e 30 49 49 b1 |..#...,,....0II.|
  00e0: 4c 4a 32 48 33 30 b0 34 42 b8 38 29 b1 08 e2 62 |LJ2H30.4B.8)...b|
  00f0: 20 03 6a ca c2 2c db 2f f7 2c fa 6d fc fb 34 be | .j..,./.,.m..4.|
  0100: fc 5c 21 a2 39 cb 66 77 7c 00 0d c3 59 17 14 58 |.\!.9.fw|...Y..X|
  0110: 49 16 06 29 a9 a6 29 86 c6 16 e6 a6 16 a6 26 86 |I..)..).......&.|
  0120: c9 a6 69 06 a6 46 66 a6 89 29 86 26 26 89 49 96 |..i..Ff..).&&.I.|
  0130: 69 89 16 66 29 86 29 49 5c 20 07 3e 16 fe 23 ae |i..f).)I\ .>..#.|
  0140: 26 da 1c ab 10 1f d1 f8 e3 b3 ef cd dd fc 0c 93 |&...............|
  0150: 88 75 34 36 75 04 82 55 17 14 36 a4 38 10 04 d8 |.u46u..U..6.8...|
  0160: 21 01 9a b1 83 f7 e9 45 8b d2 56 c7 a3 1f 82 52 |!......E..V....R|
  0170: d7 8a 78 ed fc d5 76 f1 36 25 81 89 c7 ad ec 90 |..x...v.6%......|
  0180: 54 47 75 2b 89 48 b1 b2 62 c9 89 c9 19 a9 56 45 |TGu+.H..b.....VE|
  0190: a9 65 ba 49 45 89 79 c9 19 ba 60 01 a0 14 23 58 |.e.IE.y...`...#X|
  01a0: 81 35 c8 7d 40 cc 04 e2 a4 a4 a6 25 96 e6 94 60 |.5.}@......%...`|
  01b0: 33 17 5f 54 00 00 d3 1b 0d 4c                   |3._T.....L|

  $ echo "http://localhost:$HGPORT1/full.hg" > server/.hg/clonebundles.manifest
  $ hg clone -U http://localhost:$HGPORT full-bundle
  applying clone bundle from http://localhost:$HGPORT1/full.hg
  adding changesets
  adding manifests
  adding file changes
  added 2 changesets with 2 changes to 2 files
  finished applying clone bundle
  searching for changes
  no changes found
  2 local changesets published

Feature works over SSH

  $ hg clone -U -e "\"$PYTHON\" \"$TESTDIR/dummyssh\"" ssh://user@dummy/server ssh-full-clone
  applying clone bundle from http://localhost:$HGPORT1/full.hg
  adding changesets
  adding manifests
  adding file changes
  added 2 changesets with 2 changes to 2 files
  finished applying clone bundle
  searching for changes
  no changes found
  2 local changesets published

Entry with unknown BUNDLESPEC is filtered and not used

  $ cat > server/.hg/clonebundles.manifest << EOF
  > http://bad.entry1 BUNDLESPEC=UNKNOWN
  > http://bad.entry2 BUNDLESPEC=xz-v1
  > http://bad.entry3 BUNDLESPEC=none-v100
  > http://localhost:$HGPORT1/full.hg BUNDLESPEC=gzip-v2
  > EOF

  $ hg clone -U http://localhost:$HGPORT filter-unknown-type
  applying clone bundle from http://localhost:$HGPORT1/full.hg
  adding changesets
  adding manifests
  adding file changes
  added 2 changesets with 2 changes to 2 files
  finished applying clone bundle
  searching for changes
  no changes found
  2 local changesets published

Automatic fallback when all entries are filtered

  $ cat > server/.hg/clonebundles.manifest << EOF
  > http://bad.entry BUNDLESPEC=UNKNOWN
  > EOF

  $ hg clone -U http://localhost:$HGPORT filter-all
  no compatible clone bundles available on server; falling back to regular clone
  (you may want to report this to the server operator)
  requesting all changes
  adding changesets
  adding manifests
  adding file changes
  added 2 changesets with 2 changes to 2 files
  new changesets 53245c60e682:aaff8d2ffbbf

URLs requiring SNI are filtered in Python <2.7.9

  $ cp full.hg sni.hg
  $ cat > server/.hg/clonebundles.manifest << EOF
  > http://localhost:$HGPORT1/sni.hg REQUIRESNI=true
  > http://localhost:$HGPORT1/full.hg
  > EOF

#if sslcontext
Python 2.7.9+ support SNI

  $ hg clone -U http://localhost:$HGPORT sni-supported
  applying clone bundle from http://localhost:$HGPORT1/sni.hg
  adding changesets
  adding manifests
  adding file changes
  added 2 changesets with 2 changes to 2 files
  finished applying clone bundle
  searching for changes
  no changes found
  2 local changesets published
#else
Python <2.7.9 will filter SNI URLs

  $ hg clone -U http://localhost:$HGPORT sni-unsupported
  applying clone bundle from http://localhost:$HGPORT1/full.hg
  adding changesets
  adding manifests
  adding file changes
  added 2 changesets with 2 changes to 2 files
  finished applying clone bundle
  searching for changes
  no changes found
  2 local changesets published
#endif

Stream clone bundles are supported

  $ hg -R server debugcreatestreamclonebundle packed.hg
  writing 613 bytes for 4 files
  bundle requirements: generaldelta, revlogv1

No bundle spec should work

  $ cat > server/.hg/clonebundles.manifest << EOF
  > http://localhost:$HGPORT1/packed.hg
  > EOF

  $ hg clone -U http://localhost:$HGPORT stream-clone-no-spec
  applying clone bundle from http://localhost:$HGPORT1/packed.hg
  4 files to transfer, 613 bytes of data
  transferred 613 bytes in *.* seconds (*) (glob)
  finished applying clone bundle
  searching for changes
  no changes found

Bundle spec without parameters should work

  $ cat > server/.hg/clonebundles.manifest << EOF
  > http://localhost:$HGPORT1/packed.hg BUNDLESPEC=none-packed1
  > EOF

  $ hg clone -U http://localhost:$HGPORT stream-clone-vanilla-spec
  applying clone bundle from http://localhost:$HGPORT1/packed.hg
  4 files to transfer, 613 bytes of data
  transferred 613 bytes in *.* seconds (*) (glob)
  finished applying clone bundle
  searching for changes
  no changes found

Bundle spec with format requirements should work

  $ cat > server/.hg/clonebundles.manifest << EOF
  > http://localhost:$HGPORT1/packed.hg BUNDLESPEC=none-packed1;requirements%3Drevlogv1
  > EOF

  $ hg clone -U http://localhost:$HGPORT stream-clone-supported-requirements
  applying clone bundle from http://localhost:$HGPORT1/packed.hg
  4 files to transfer, 613 bytes of data
  transferred 613 bytes in *.* seconds (*) (glob)
  finished applying clone bundle
  searching for changes
  no changes found

Stream bundle spec with unknown requirements should be filtered out

  $ cat > server/.hg/clonebundles.manifest << EOF
  > http://localhost:$HGPORT1/packed.hg BUNDLESPEC=none-packed1;requirements%3Drevlogv42
  > EOF

  $ hg clone -U http://localhost:$HGPORT stream-clone-unsupported-requirements
  no compatible clone bundles available on server; falling back to regular clone
  (you may want to report this to the server operator)
  requesting all changes
  adding changesets
  adding manifests
  adding file changes
  added 2 changesets with 2 changes to 2 files
  new changesets 53245c60e682:aaff8d2ffbbf

Set up manifest for testing preferences
(Remember, the TYPE does not have to match reality - the URL is
important)

  $ cp full.hg gz-a.hg
  $ cp full.hg gz-b.hg
  $ cp full.hg bz2-a.hg
  $ cp full.hg bz2-b.hg
  $ cat > server/.hg/clonebundles.manifest << EOF
  > http://localhost:$HGPORT1/gz-a.hg BUNDLESPEC=gzip-v2 extra=a
  > http://localhost:$HGPORT1/bz2-a.hg BUNDLESPEC=bzip2-v2 extra=a
  > http://localhost:$HGPORT1/gz-b.hg BUNDLESPEC=gzip-v2 extra=b
  > http://localhost:$HGPORT1/bz2-b.hg BUNDLESPEC=bzip2-v2 extra=b
  > EOF

Preferring an undefined attribute will take first entry

  $ hg --config ui.clonebundleprefers=foo=bar clone -U http://localhost:$HGPORT prefer-foo
  applying clone bundle from http://localhost:$HGPORT1/gz-a.hg
  adding changesets
  adding manifests
  adding file changes
  added 2 changesets with 2 changes to 2 files
  finished applying clone bundle
  searching for changes
  no changes found
  2 local changesets published

Preferring bz2 type will download first entry of that type

  $ hg --config ui.clonebundleprefers=COMPRESSION=bzip2 clone -U http://localhost:$HGPORT prefer-bz
  applying clone bundle from http://localhost:$HGPORT1/bz2-a.hg
  adding changesets
  adding manifests
  adding file changes
  added 2 changesets with 2 changes to 2 files
  finished applying clone bundle
  searching for changes
  no changes found
  2 local changesets published

Preferring multiple values of an option works

  $ hg --config ui.clonebundleprefers=COMPRESSION=unknown,COMPRESSION=bzip2 clone -U http://localhost:$HGPORT prefer-multiple-bz
  applying clone bundle from http://localhost:$HGPORT1/bz2-a.hg
  adding changesets
  adding manifests
  adding file changes
  added 2 changesets with 2 changes to 2 files
  finished applying clone bundle
  searching for changes
  no changes found
  2 local changesets published

Sorting multiple values should get us back to original first entry

  $ hg --config ui.clonebundleprefers=BUNDLESPEC=unknown,BUNDLESPEC=gzip-v2,BUNDLESPEC=bzip2-v2 clone -U http://localhost:$HGPORT prefer-multiple-gz
  applying clone bundle from http://localhost:$HGPORT1/gz-a.hg
  adding changesets
  adding manifests
  adding file changes
  added 2 changesets with 2 changes to 2 files
  finished applying clone bundle
  searching for changes
  no changes found
  2 local changesets published

Preferring multiple attributes has correct order

  $ hg --config ui.clonebundleprefers=extra=b,BUNDLESPEC=bzip2-v2 clone -U http://localhost:$HGPORT prefer-separate-attributes
  applying clone bundle from http://localhost:$HGPORT1/bz2-b.hg
  adding changesets
  adding manifests
  adding file changes
  added 2 changesets with 2 changes to 2 files
  finished applying clone bundle
  searching for changes
  no changes found
  2 local changesets published

Test where attribute is missing from some entries

  $ cat > server/.hg/clonebundles.manifest << EOF
  > http://localhost:$HGPORT1/gz-a.hg BUNDLESPEC=gzip-v2
  > http://localhost:$HGPORT1/bz2-a.hg BUNDLESPEC=bzip2-v2
  > http://localhost:$HGPORT1/gz-b.hg BUNDLESPEC=gzip-v2 extra=b
  > http://localhost:$HGPORT1/bz2-b.hg BUNDLESPEC=bzip2-v2 extra=b
  > EOF

  $ hg --config ui.clonebundleprefers=extra=b clone -U http://localhost:$HGPORT prefer-partially-defined-attribute
  applying clone bundle from http://localhost:$HGPORT1/gz-b.hg
  adding changesets
  adding manifests
  adding file changes
  added 2 changesets with 2 changes to 2 files
  finished applying clone bundle
  searching for changes
  no changes found
  2 local changesets published

Test interaction between clone bundles and --stream

A manifest with just a gzip bundle

  $ cat > server/.hg/clonebundles.manifest << EOF
  > http://localhost:$HGPORT1/gz-a.hg BUNDLESPEC=gzip-v2
  > EOF

  $ hg clone -U --stream http://localhost:$HGPORT uncompressed-gzip
  no compatible clone bundles available on server; falling back to regular clone
  (you may want to report this to the server operator)
  streaming all changes
  9 files to transfer, 816 bytes of data
  transferred 816 bytes in * seconds (*) (glob)

A manifest with a stream clone but no BUNDLESPEC

  $ cat > server/.hg/clonebundles.manifest << EOF
  > http://localhost:$HGPORT1/packed.hg
  > EOF

  $ hg clone -U --stream http://localhost:$HGPORT uncompressed-no-bundlespec
  no compatible clone bundles available on server; falling back to regular clone
  (you may want to report this to the server operator)
  streaming all changes
  9 files to transfer, 816 bytes of data
  transferred 816 bytes in * seconds (*) (glob)

A manifest with a gzip bundle and a stream clone

  $ cat > server/.hg/clonebundles.manifest << EOF
  > http://localhost:$HGPORT1/gz-a.hg BUNDLESPEC=gzip-v2
  > http://localhost:$HGPORT1/packed.hg BUNDLESPEC=none-packed1
  > EOF

  $ hg clone -U --stream http://localhost:$HGPORT uncompressed-gzip-packed
  applying clone bundle from http://localhost:$HGPORT1/packed.hg
  4 files to transfer, 613 bytes of data
  transferred 613 bytes in * seconds (*) (glob)
  finished applying clone bundle
  searching for changes
  no changes found

A manifest with a gzip bundle and stream clone with supported requirements

  $ cat > server/.hg/clonebundles.manifest << EOF
  > http://localhost:$HGPORT1/gz-a.hg BUNDLESPEC=gzip-v2
  > http://localhost:$HGPORT1/packed.hg BUNDLESPEC=none-packed1;requirements%3Drevlogv1
  > EOF

  $ hg clone -U --stream http://localhost:$HGPORT uncompressed-gzip-packed-requirements
  applying clone bundle from http://localhost:$HGPORT1/packed.hg
  4 files to transfer, 613 bytes of data
  transferred 613 bytes in * seconds (*) (glob)
  finished applying clone bundle
  searching for changes
  no changes found

A manifest with a gzip bundle and a stream clone with unsupported requirements

  $ cat > server/.hg/clonebundles.manifest << EOF
  > http://localhost:$HGPORT1/gz-a.hg BUNDLESPEC=gzip-v2
  > http://localhost:$HGPORT1/packed.hg BUNDLESPEC=none-packed1;requirements%3Drevlogv42
  > EOF

  $ hg clone -U --stream http://localhost:$HGPORT uncompressed-gzip-packed-unsupported-requirements
  no compatible clone bundles available on server; falling back to regular clone
  (you may want to report this to the server operator)
  streaming all changes
  9 files to transfer, 816 bytes of data
  transferred 816 bytes in * seconds (*) (glob)

Test clone bundle retrieved through bundle2

  $ cat << EOF >> $HGRCPATH
  > [extensions]
  > largefiles=
  > EOF
  $ killdaemons.py
  $ hg -R server serve -d -p $HGPORT --pid-file hg.pid --accesslog access.log
  $ cat hg.pid >> $DAEMON_PIDS

  $ hg -R server debuglfput gz-a.hg
  1f74b3d08286b9b3a16fb3fa185dd29219cbc6ae

  $ cat > server/.hg/clonebundles.manifest << EOF
  > largefile://1f74b3d08286b9b3a16fb3fa185dd29219cbc6ae BUNDLESPEC=gzip-v2
  > EOF

  $ hg clone -U http://localhost:$HGPORT largefile-provided --traceback
  applying clone bundle from largefile://1f74b3d08286b9b3a16fb3fa185dd29219cbc6ae
  adding changesets
  adding manifests
  adding file changes
  added 2 changesets with 2 changes to 2 files
  finished applying clone bundle
  searching for changes
  no changes found
  2 local changesets published