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Diffstat (limited to 't/t5552-skipping-fetch-negotiator.sh')
| -rwxr-xr-x | t/t5552-skipping-fetch-negotiator.sh | 209 |
1 files changed, 209 insertions, 0 deletions
diff --git a/t/t5552-skipping-fetch-negotiator.sh b/t/t5552-skipping-fetch-negotiator.sh new file mode 100755 index 0000000..165427d --- /dev/null +++ b/t/t5552-skipping-fetch-negotiator.sh @@ -0,0 +1,209 @@ +#!/bin/sh + +test_description='test skipping fetch negotiator' +. ./test-lib.sh + +have_sent () { + while test "$#" -ne 0 + do + grep "fetch> have $(git -C client rev-parse $1)" trace + if test $? -ne 0 + then + echo "No have $(git -C client rev-parse $1) ($1)" + return 1 + fi + shift + done +} + +have_not_sent () { + while test "$#" -ne 0 + do + grep "fetch> have $(git -C client rev-parse $1)" trace + if test $? -eq 0 + then + return 1 + fi + shift + done +} + +# trace_fetch <client_dir> <server_dir> [args] +# +# Trace the packet output of fetch, but make sure we disable the variable +# in the child upload-pack, so we don't combine the results in the same file. +trace_fetch () { + client=$1; shift + server=$1; shift + GIT_TRACE_PACKET="$(pwd)/trace" \ + git -C "$client" fetch \ + --upload-pack 'unset GIT_TRACE_PACKET; git-upload-pack' \ + "$server" "$@" +} + +test_expect_success 'commits with no parents are sent regardless of skip distance' ' + git init server && + test_commit -C server to_fetch && + + git init client && + for i in $(test_seq 7) + do + test_commit -C client c$i || return 1 + done && + + # We send: "c7" (skip 1) "c5" (skip 2) "c2" (skip 4). After that, since + # "c1" has no parent, it is still sent as "have" even though it would + # normally be skipped. + test_config -C client fetch.negotiationalgorithm skipping && + trace_fetch client "$(pwd)/server" && + have_sent c7 c5 c2 c1 && + have_not_sent c6 c4 c3 +' + +test_expect_success 'when two skips collide, favor the larger one' ' + rm -rf server client trace && + git init server && + test_commit -C server to_fetch && + + git init client && + for i in $(test_seq 11) + do + test_commit -C client c$i || return 1 + done && + git -C client checkout c5 && + test_commit -C client c5side && + + # Before reaching c5, we send "c5side" (skip 1) and "c11" (skip 1) "c9" + # (skip 2) "c6" (skip 4). The larger skip (skip 4) takes precedence, so + # the next "have" sent will be "c1" (from "c6" skip 4) and not "c4" + # (from "c5side" skip 1). + test_config -C client fetch.negotiationalgorithm skipping && + trace_fetch client "$(pwd)/server" && + have_sent c5side c11 c9 c6 c1 && + have_not_sent c10 c8 c7 c5 c4 c3 c2 +' + +test_expect_success 'use ref advertisement to filter out commits' ' + rm -rf server client trace && + git init server && + test_commit -C server c1 && + test_commit -C server c2 && + test_commit -C server c3 && + git -C server tag -d c1 c2 c3 && + + git clone server client && + test_commit -C client c4 && + test_commit -C client c5 && + git -C client checkout c4^^ && + test_commit -C client c2side && + + git -C server checkout --orphan anotherbranch && + test_commit -C server to_fetch && + + # The server advertising "c3" (as "refs/heads/main") means that we do + # not need to send any ancestors of "c3", but we still need to send "c3" + # itself. + test_config -C client fetch.negotiationalgorithm skipping && + + # The ref advertisement itself is filtered when protocol v2 is used, so + # use v0. + ( + GIT_TEST_PROTOCOL_VERSION=0 && + export GIT_TEST_PROTOCOL_VERSION && + trace_fetch client origin to_fetch + ) && + have_sent c5 c4^ c2side && + have_not_sent c4 c4^^ c4^^^ +' + +test_expect_success 'handle clock skew' ' + rm -rf server client trace && + git init server && + test_commit -C server to_fetch && + + git init client && + + # 2 regular commits + test_tick=2000000000 && + test_commit -C client c1 && + test_commit -C client c2 && + + # 4 old commits + test_tick=1000000000 && + git -C client checkout c1 && + test_commit -C client old1 && + test_commit -C client old2 && + test_commit -C client old3 && + test_commit -C client old4 && + + # "c2" and "c1" are popped first, then "old4" to "old1". "old1" would + # normally be skipped, but is treated as a commit without a parent here + # and sent, because (due to clock skew) its only parent has already been + # popped off the priority queue. + test_config -C client fetch.negotiationalgorithm skipping && + trace_fetch client "$(pwd)/server" && + have_sent c2 c1 old4 old2 old1 && + have_not_sent old3 +' + +test_expect_success 'do not send "have" with ancestors of commits that server ACKed' ' + rm -rf server client trace && + git init server && + test_commit -C server to_fetch && + + git init client && + for i in $(test_seq 8) + do + git -C client checkout --orphan b$i && + test_commit -C client b$i.c0 || return 1 + done && + for j in $(test_seq 19) + do + for i in $(test_seq 8) + do + git -C client checkout b$i && + test_commit -C client b$i.c$j || return 1 + done + done && + + # Copy this branch over to the server and add a commit on it so that it + # is reachable but not advertised. + git -C server fetch --no-tags "$(pwd)/client" b1:refs/heads/b1 && + git -C server checkout b1 && + test_commit -C server commit-on-b1 && + + test_config -C client fetch.negotiationalgorithm skipping && + + # NEEDSWORK: The number of "have"s sent depends on whether the transport + # is stateful. If the overspecification of the result were reduced, this + # test could be used for both stateful and stateless transports. + ( + # Force protocol v0, in which local transport is stateful (in + # protocol v2 it is stateless). + GIT_TEST_PROTOCOL_VERSION=0 && + export GIT_TEST_PROTOCOL_VERSION && + trace_fetch client "$(pwd)/server" to_fetch + ) && + grep " fetch" trace && + + # fetch-pack sends 2 requests each containing 16 "have" lines before + # processing the first response. In these 2 requests, 4 commits from + # each branch are sent. Just check the first branch. + have_sent b1.c19 b1.c17 b1.c14 b1.c9 && + have_not_sent b1.c18 b1.c16 b1.c15 b1.c13 b1.c12 b1.c11 b1.c10 && + + # While fetch-pack is processing the first response, it should read that + # the server ACKs b1.c19 and b1.c17. + grep "fetch< ACK $(git -C client rev-parse b1.c19) common" trace && + grep "fetch< ACK $(git -C client rev-parse b1.c17) common" trace && + + # fetch-pack should thus not send any more commits in the b1 branch, but + # should still send the others (in this test, just check b2). + for i in $(test_seq 0 8) + do + have_not_sent b1.c$i || return 1 + done && + have_sent b2.c1 b2.c0 +' + +test_done |