From: Marc Strapetz via GitGitGadget Date: Thu, 06 Jan 2022 22:34:55 GMT Subject: [PATCH v3 1/4] test-lib: introduce API for verifying file mtime Message-ID: In-Reply-To: From: Marc Strapetz Add functions `test_set_magic_mtime` and `test_is_magic_mtime` which can be used to (re)set the mtime of a file to a predefined ("magic") timestamp, then perform some operations and finally check for mtime changes of the file. The core implementation follows the suggestion from the mailing list [1]. [1] https://lore.kernel.org/git/xmqqczl5hpaq.fsf@gitster.g/T/#u Signed-off-by: Marc Strapetz --- t/test-lib-functions.sh | 28 ++++++++++++++++++++++++++++ 1 file changed, 28 insertions(+) diff --git a/t/test-lib-functions.sh b/t/test-lib-functions.sh index 389153e5916..01dd8c01f59 100644 --- a/t/test-lib-functions.sh +++ b/t/test-lib-functions.sh @@ -1806,3 +1806,31 @@ test_region () { test_readlink () { perl -le 'print readlink($_) for @ARGV' "$@" } + +# Set a fixed "magic" mtime to the given file, +# with an optional increment specified as second argument. +# Use in combination with test_is_magic_mtime. +test_set_magic_mtime () { + # We are using 1234567890 because it's a common timestamp used in + # various tests. It represents date 2009-02-13 which should be safe + # to use as long as the filetime clock is reasonably accurate. + local inc=${2:-0} && + local mtime=$((1234567890 + $inc)) && + test-tool chmtime =$mtime $1 && + test_is_magic_mtime $1 $inc +} + +# Test whether the given file has the "magic" mtime set, +# with an optional increment specified as second argument. +# Use in combination with test_set_magic_mtime. +test_is_magic_mtime () { + local inc=${2:-0} && + local mtime=$((1234567890 + $inc)) && + echo $mtime >.git/test-mtime-expect && + test-tool chmtime --get $1 >.git/test-mtime-actual && + test_cmp .git/test-mtime-expect .git/test-mtime-actual + local ret=$? + rm .git/test-mtime-expect + rm .git/test-mtime-actual + return $ret +} -- gitgitgadget