diff -r a520aefb96f1 -r e75463e3179f tests/test-http-protocol.t
--- a/tests/test-http-protocol.t	Sat Dec 24 15:22:18 2016 -0700
+++ b/tests/test-http-protocol.t	Sat Dec 24 15:29:32 2016 -0700
@@ -42,3 +42,126 @@
   compression=none,zlib
 
   $ killdaemons.py
+
+Start a default server again
+
+  $ hg -R server serve -p $HGPORT -d --pid-file hg.pid
+  $ cat hg.pid > $DAEMON_PIDS
+
+Server should send application/mercurial-0.1 to clients if no Accept is used
+
+  $ get-with-headers.py --headeronly 127.0.0.1:$HGPORT '?cmd=getbundle&heads=e93700bd72895c5addab234c56d4024b487a362f&common=0000000000000000000000000000000000000000' -
+  200 Script output follows
+  content-type: application/mercurial-0.1
+  date: * (glob)
+  server: * (glob)
+  transfer-encoding: chunked
+
+Server should send application/mercurial-0.1 when client says it wants it
+
+  $ get-with-headers.py --hgproto '0.1' --headeronly 127.0.0.1:$HGPORT '?cmd=getbundle&heads=e93700bd72895c5addab234c56d4024b487a362f&common=0000000000000000000000000000000000000000' -
+  200 Script output follows
+  content-type: application/mercurial-0.1
+  date: * (glob)
+  server: * (glob)
+  transfer-encoding: chunked
+
+Server should send application/mercurial-0.2 when client says it wants it
+
+  $ get-with-headers.py --hgproto '0.2' --headeronly 127.0.0.1:$HGPORT '?cmd=getbundle&heads=e93700bd72895c5addab234c56d4024b487a362f&common=0000000000000000000000000000000000000000' -
+  200 Script output follows
+  content-type: application/mercurial-0.2
+  date: * (glob)
+  server: * (glob)
+  transfer-encoding: chunked
+
+  $ get-with-headers.py --hgproto '0.1 0.2' --headeronly 127.0.0.1:$HGPORT '?cmd=getbundle&heads=e93700bd72895c5addab234c56d4024b487a362f&common=0000000000000000000000000000000000000000' -
+  200 Script output follows
+  content-type: application/mercurial-0.2
+  date: * (glob)
+  server: * (glob)
+  transfer-encoding: chunked
+
+Requesting a compression format that server doesn't support results will fall back to 0.1
+
+  $ get-with-headers.py --hgproto '0.2 comp=aa' --headeronly 127.0.0.1:$HGPORT '?cmd=getbundle&heads=e93700bd72895c5addab234c56d4024b487a362f&common=0000000000000000000000000000000000000000' -
+  200 Script output follows
+  content-type: application/mercurial-0.1
+  date: * (glob)
+  server: * (glob)
+  transfer-encoding: chunked
+
+#if zstd
+zstd is used if available
+
+  $ get-with-headers.py --hgproto '0.2 comp=zstd' 127.0.0.1:$HGPORT '?cmd=getbundle&heads=e93700bd72895c5addab234c56d4024b487a362f&common=0000000000000000000000000000000000000000' > resp
+  $ f --size --hexdump --bytes 36 --sha1 resp
+  resp: size=248, sha1=4d8d8f87fb82bd542ce52881fdc94f850748
+  0000: 32 30 30 20 53 63 72 69 70 74 20 6f 75 74 70 75 |200 Script outpu|
+  0010: 74 20 66 6f 6c 6c 6f 77 73 0a 0a 04 7a 73 74 64 |t follows...zstd|
+  0020: 28 b5 2f fd                                     |(./.|
+
+#endif
+
+application/mercurial-0.2 is not yet used on non-streaming responses
+
+  $ get-with-headers.py --hgproto '0.2' 127.0.0.1:$HGPORT '?cmd=heads' -
+  200 Script output follows
+  content-length: 41
+  content-type: application/mercurial-0.1
+  date: * (glob)
+  server: * (glob)
+  
+  e93700bd72895c5addab234c56d4024b487a362f
+
+Now test protocol preference usage
+
+  $ killdaemons.py
+  $ hg --config server.compressionengines=none,zlib -R server serve -p $HGPORT -d --pid-file hg.pid
+  $ cat hg.pid > $DAEMON_PIDS
+
+No Accept will send 0.1+zlib, even though "none" is preferred b/c "none" isn't supported on 0.1
+
+  $ get-with-headers.py --headeronly 127.0.0.1:$HGPORT '?cmd=getbundle&heads=e93700bd72895c5addab234c56d4024b487a362f&common=0000000000000000000000000000000000000000' Content-Type
+  200 Script output follows
+  content-type: application/mercurial-0.1
+
+  $ get-with-headers.py 127.0.0.1:$HGPORT '?cmd=getbundle&heads=e93700bd72895c5addab234c56d4024b487a362f&common=0000000000000000000000000000000000000000'  > resp
+  $ f --size --hexdump --bytes 28 --sha1 resp
+  resp: size=227, sha1=35a4c074da74f32f5440da3cbf04
+  0000: 32 30 30 20 53 63 72 69 70 74 20 6f 75 74 70 75 |200 Script outpu|
+  0010: 74 20 66 6f 6c 6c 6f 77 73 0a 0a 78             |t follows..x|
+
+Explicit 0.1 will send zlib because "none" isn't supported on 0.1
+
+  $ get-with-headers.py --hgproto '0.1' 127.0.0.1:$HGPORT '?cmd=getbundle&heads=e93700bd72895c5addab234c56d4024b487a362f&common=0000000000000000000000000000000000000000'  > resp
+  $ f --size --hexdump --bytes 28 --sha1 resp
+  resp: size=227, sha1=35a4c074da74f32f5440da3cbf04
+  0000: 32 30 30 20 53 63 72 69 70 74 20 6f 75 74 70 75 |200 Script outpu|
+  0010: 74 20 66 6f 6c 6c 6f 77 73 0a 0a 78             |t follows..x|
+
+0.2 with no compression will get "none" because that is server's preference
+(spec says ZL and UN are implicitly supported)
+
+  $ get-with-headers.py --hgproto '0.2' 127.0.0.1:$HGPORT '?cmd=getbundle&heads=e93700bd72895c5addab234c56d4024b487a362f&common=0000000000000000000000000000000000000000'  > resp
+  $ f --size --hexdump --bytes 32 --sha1 resp
+  resp: size=432, sha1=ac931b412ec185a02e0e5bcff98dac83
+  0000: 32 30 30 20 53 63 72 69 70 74 20 6f 75 74 70 75 |200 Script outpu|
+  0010: 74 20 66 6f 6c 6c 6f 77 73 0a 0a 04 6e 6f 6e 65 |t follows...none|
+
+Client receives server preference even if local order doesn't match
+
+  $ get-with-headers.py --hgproto '0.2 comp=zlib,none' 127.0.0.1:$HGPORT '?cmd=getbundle&heads=e93700bd72895c5addab234c56d4024b487a362f&common=0000000000000000000000000000000000000000'  > resp
+  $ f --size --hexdump --bytes 32 --sha1 resp
+  resp: size=432, sha1=ac931b412ec185a02e0e5bcff98dac83
+  0000: 32 30 30 20 53 63 72 69 70 74 20 6f 75 74 70 75 |200 Script outpu|
+  0010: 74 20 66 6f 6c 6c 6f 77 73 0a 0a 04 6e 6f 6e 65 |t follows...none|
+
+Client receives only supported format even if not server preferred format
+
+  $ get-with-headers.py --hgproto '0.2 comp=zlib' 127.0.0.1:$HGPORT '?cmd=getbundle&heads=e93700bd72895c5addab234c56d4024b487a362f&common=0000000000000000000000000000000000000000'  > resp
+  $ f --size --hexdump --bytes 33 --sha1 resp
+  resp: size=232, sha1=a1c727f0c9693ca15742a75c30419bc36
+  0000: 32 30 30 20 53 63 72 69 70 74 20 6f 75 74 70 75 |200 Script outpu|
+  0010: 74 20 66 6f 6c 6c 6f 77 73 0a 0a 04 7a 6c 69 62 |t follows...zlib|
+  0020: 78                                              |x|