git/t/lib-commit-graph.sh

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#!/bin/sh
# Helper functions for testing commit-graphs.
# Initialize OID cache with oid_version
test_oid_cache <<-EOF
oid_version sha1:1
oid_version sha256:2
EOF
graph_git_two_modes() {
git -c core.commitGraph=true $1 >output &&
git -c core.commitGraph=false $1 >expect &&
test_cmp expect output
}
# graph_git_behavior <name> <directory> <branch> <compare>
#
# Ensures that a handful of traversal operations produce the same
# results with and without the commit-graph in use.
#
# NOTE: it is a bug to call this function with <directory> containing
# any characters in $IFS.
graph_git_behavior() {
MSG=$1
DIR=$2
BRANCH=$3
COMPARE=$4
test_expect_success "check normal git operations: $MSG" '
graph_git_two_modes "${DIR:+-C $DIR} log --oneline $BRANCH" &&
graph_git_two_modes "${DIR:+-C $DIR} log --topo-order $BRANCH" &&
graph_git_two_modes "${DIR:+-C $DIR} log --graph $COMPARE..$BRANCH" &&
graph_git_two_modes "${DIR:+-C $DIR} branch -vv" &&
graph_git_two_modes "${DIR:+-C $DIR} merge-base -a $BRANCH $COMPARE"
'
}
graph_read_expect() {
OPTIONAL=""
NUM_CHUNKS=3
DIR="."
if test "$1" = -C
then
shift
DIR="$1"
shift
fi
if test -n "$2"
then
OPTIONAL=" $2"
NUM_CHUNKS=$((3 + $(echo "$2" | wc -w)))
fi
GENERATION_VERSION=2
if test -n "$3"
then
GENERATION_VERSION=$3
fi
OPTIONS=
if test $GENERATION_VERSION -gt 1
then
OPTIONS=" read_generation_data"
fi
cat >"$DIR/expect" <<-EOF
header: 43475048 1 $(test_oid oid_version) $NUM_CHUNKS 0
num_commits: $1
chunks: oid_fanout oid_lookup commit_metadata$OPTIONAL
options:$OPTIONS
EOF
(
cd "$DIR" &&
test-tool read-graph >output &&
test_cmp expect output
)
}