git/t/t1419-exclude-refs.sh
Taylor Blau c489f47a64 refs/packed-backend.c: add trace2 counters for jump list
The previous commit added low-level tests to ensure that the packed-refs
iterator did not enumerate excluded sections of the refspace.

However, there was no guarantee that these sections weren't being
visited, only that they were being suppressed from the output. To harden
these tests, add a trace2 counter which tracks the number of regions
skipped by the packed-refs iterator, and assert on its value.

Suggested-by: Derrick Stolee <derrickstolee@github.com>
Signed-off-by: Taylor Blau <me@ttaylorr.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2023-07-10 14:48:55 -07:00

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#!/bin/sh
test_description='test exclude_patterns functionality in main ref store'
GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME=main
export GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME
TEST_PASSES_SANITIZE_LEAK=true
. ./test-lib.sh
for_each_ref__exclude () {
GIT_TRACE2_PERF=1 test-tool ref-store main \
for-each-ref--exclude "$@" >actual.raw
cut -d ' ' -f 2 actual.raw
}
for_each_ref () {
git for-each-ref --format='%(refname)' "$@"
}
assert_jumps () {
local nr="$1"
local trace="$2"
grep -q "name:jumps_made value:$nr$" $trace
}
assert_no_jumps () {
! assert_jumps ".*" "$1"
}
test_expect_success 'setup' '
test_commit --no-tag base &&
base="$(git rev-parse HEAD)" &&
for name in foo bar baz quux
do
for i in 1 2 3
do
echo "create refs/heads/$name/$i $base" || return 1
done || return 1
done >in &&
echo "delete refs/heads/main" >>in &&
git update-ref --stdin <in &&
git pack-refs --all
'
test_expect_success 'excluded region in middle' '
for_each_ref__exclude refs/heads refs/heads/foo >actual 2>perf &&
for_each_ref refs/heads/bar refs/heads/baz refs/heads/quux >expect &&
test_cmp expect actual &&
assert_jumps 1 perf
'
test_expect_success 'excluded region at beginning' '
for_each_ref__exclude refs/heads refs/heads/bar >actual 2>perf &&
for_each_ref refs/heads/baz refs/heads/foo refs/heads/quux >expect &&
test_cmp expect actual &&
assert_jumps 1 perf
'
test_expect_success 'excluded region at end' '
for_each_ref__exclude refs/heads refs/heads/quux >actual 2>perf &&
for_each_ref refs/heads/foo refs/heads/bar refs/heads/baz >expect &&
test_cmp expect actual &&
assert_jumps 1 perf
'
test_expect_success 'disjoint excluded regions' '
for_each_ref__exclude refs/heads refs/heads/bar refs/heads/quux >actual 2>perf &&
for_each_ref refs/heads/baz refs/heads/foo >expect &&
test_cmp expect actual &&
assert_jumps 2 perf
'
test_expect_success 'adjacent, non-overlapping excluded regions' '
for_each_ref__exclude refs/heads refs/heads/bar refs/heads/baz >actual 2>perf &&
for_each_ref refs/heads/foo refs/heads/quux >expect &&
test_cmp expect actual &&
assert_jumps 1 perf
'
test_expect_success 'overlapping excluded regions' '
for_each_ref__exclude refs/heads refs/heads/ba refs/heads/baz >actual 2>perf &&
for_each_ref refs/heads/foo refs/heads/quux >expect &&
test_cmp expect actual &&
assert_jumps 1 perf
'
test_expect_success 'several overlapping excluded regions' '
for_each_ref__exclude refs/heads \
refs/heads/bar refs/heads/baz refs/heads/foo >actual 2>perf &&
for_each_ref refs/heads/quux >expect &&
test_cmp expect actual &&
assert_jumps 1 perf
'
test_expect_success 'non-matching excluded section' '
for_each_ref__exclude refs/heads refs/heads/does/not/exist >actual 2>perf &&
for_each_ref >expect &&
test_cmp expect actual &&
assert_no_jumps perf
'
test_expect_success 'meta-characters are discarded' '
for_each_ref__exclude refs/heads "refs/heads/ba*" >actual 2>perf &&
for_each_ref >expect &&
test_cmp expect actual &&
assert_no_jumps perf
'
test_done