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Diffstat (limited to 'test/lib-sharness')
| -rw-r--r-- | test/lib-sharness/functions.sh | 593 |
1 files changed, 593 insertions, 0 deletions
diff --git a/test/lib-sharness/functions.sh b/test/lib-sharness/functions.sh new file mode 100644 index 0000000..56401d8 --- /dev/null +++ b/test/lib-sharness/functions.sh @@ -0,0 +1,593 @@ +# Library of functions shared by all tests scripts, included by +# sharness.sh. +# +# Copyright (c) 2005-2019 Junio C Hamano +# Copyright (c) 2005-2019 Git project +# Copyright (c) 2011-2019 Mathias Lafeldt +# Copyright (c) 2015-2019 Christian Couder +# +# This program is free software: you can redistribute it and/or modify +# it under the terms of the GNU General Public License as published by +# the Free Software Foundation, either version 2 of the License, or +# (at your option) any later version. +# +# This program is distributed in the hope that it will be useful, +# but WITHOUT ANY WARRANTY; without even the implied warranty of +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +# GNU General Public License for more details. +# +# You should have received a copy of the GNU General Public License +# along with this program. If not, see http://www.gnu.org/licenses/ . + +# These assignments are to make shellcheck happy. They should be +# removed when we can use a new version of shellcheck that contains: +# https://github.com/koalaman/shellcheck/pull/1553 +: "${debug:=}" +: "${verbose:=}" +: "${this_test:=}" +: "${skip_all:=}" +: "${EXIT_OK:=}" +: "${test_failure:=0}" +: "${test_fixed:=0}" +: "${test_broken:=0}" +: "${test_success:=0}" + +# Public: Define that a test prerequisite is available. +# +# The prerequisite can later be checked explicitly using test_have_prereq or +# implicitly by specifying the prerequisite name in calls to test_expect_success +# or test_expect_failure. +# +# $1 - Name of prerequisite (a simple word, in all capital letters by convention) +# +# Examples +# +# # Set PYTHON prerequisite if interpreter is available. +# command -v python >/dev/null && test_set_prereq PYTHON +# +# # Set prerequisite depending on some variable. +# test -z "$NO_GETTEXT" && test_set_prereq GETTEXT +# +# Returns nothing. +test_set_prereq() { + satisfied_prereq="$satisfied_prereq$1 " +} +satisfied_prereq=" " + +# Public: Check if one or more test prerequisites are defined. +# +# The prerequisites must have previously been set with test_set_prereq. +# The most common use of this is to skip all the tests if some essential +# prerequisite is missing. +# +# $1 - Comma-separated list of test prerequisites. +# +# Examples +# +# # Skip all remaining tests if prerequisite is not set. +# if ! test_have_prereq PERL; then +# skip_all='skipping perl interface tests, perl not available' +# test_done +# fi +# +# Returns 0 if all prerequisites are defined or 1 otherwise. +test_have_prereq() { + # prerequisites can be concatenated with ',' + save_IFS=$IFS + IFS=, + set -- $@ + IFS=$save_IFS + + total_prereq=0 + ok_prereq=0 + missing_prereq= + + for prerequisite; do + case "$prerequisite" in + !*) + negative_prereq=t + prerequisite=${prerequisite#!} + ;; + *) + negative_prereq= + esac + + total_prereq=$((total_prereq + 1)) + case "$satisfied_prereq" in + *" $prerequisite "*) + satisfied_this_prereq=t + ;; + *) + satisfied_this_prereq= + esac + + case "$satisfied_this_prereq,$negative_prereq" in + t,|,t) + ok_prereq=$((ok_prereq + 1)) + ;; + *) + # Keep a list of missing prerequisites; restore + # the negative marker if necessary. + prerequisite=${negative_prereq:+!}$prerequisite + if test -z "$missing_prereq"; then + missing_prereq=$prerequisite + else + missing_prereq="$prerequisite,$missing_prereq" + fi + esac + done + + test $total_prereq = $ok_prereq +} + +# Public: Execute commands in debug mode. +# +# Takes a single argument and evaluates it only when the test script is started +# with --debug. This is primarily meant for use during the development of test +# scripts. +# +# $1 - Commands to be executed. +# +# Examples +# +# test_debug "cat some_log_file" +# +# Returns the exit code of the last command executed in debug mode or 0 +# otherwise. +test_debug() { + test "$debug" = "" || eval "$1" +} + +# Public: Stop execution and start a shell. +# +# This is useful for debugging tests and only makes sense together with "-v". +# Be sure to remove all invocations of this command before submitting. +test_pause() { + if test "$verbose" = t; then + "$SHELL_PATH" <&6 >&3 2>&4 + else + error >&5 "test_pause requires --verbose" + fi +} + +# Public: Run test commands and expect them to succeed. +# +# When the test passed, an "ok" message is printed and the number of successful +# tests is incremented. When it failed, a "not ok" message is printed and the +# number of failed tests is incremented. +# +# With --immediate, exit test immediately upon the first failed test. +# +# Usually takes two arguments: +# $1 - Test description +# $2 - Commands to be executed. +# +# With three arguments, the first will be taken to be a prerequisite: +# $1 - Comma-separated list of test prerequisites. The test will be skipped if +# not all of the given prerequisites are set. To negate a prerequisite, +# put a "!" in front of it. +# $2 - Test description +# $3 - Commands to be executed. +# +# Examples +# +# test_expect_success \ +# 'git-write-tree should be able to write an empty tree.' \ +# 'tree=$(git-write-tree)' +# +# # Test depending on one prerequisite. +# test_expect_success TTY 'git --paginate rev-list uses a pager' \ +# ' ... ' +# +# # Multiple prerequisites are separated by a comma. +# test_expect_success PERL,PYTHON 'yo dawg' \ +# ' test $(perl -E 'print eval "1 +" . qx[python -c "print 2"]') == "4" ' +# +# Returns nothing. +test_expect_success() { + test "$#" = 3 && { test_prereq=$1; shift; } || test_prereq= + test "$#" = 2 || error "bug in the test script: not 2 or 3 parameters to test_expect_success" + export test_prereq + if ! test_skip_ "$@"; then + say >&3 "expecting success: $2" + if test_run_ "$2"; then + test_ok_ "$1" + else + test_failure_ "$@" + fi + fi + echo >&3 "" +} + +# Public: Run test commands and expect them to fail. Used to demonstrate a known +# breakage. +# +# This is NOT the opposite of test_expect_success, but rather used to mark a +# test that demonstrates a known breakage. +# +# When the test passed, an "ok" message is printed and the number of fixed tests +# is incremented. When it failed, a "not ok" message is printed and the number +# of tests still broken is incremented. +# +# Failures from these tests won't cause --immediate to stop. +# +# Usually takes two arguments: +# $1 - Test description +# $2 - Commands to be executed. +# +# With three arguments, the first will be taken to be a prerequisite: +# $1 - Comma-separated list of test prerequisites. The test will be skipped if +# not all of the given prerequisites are set. To negate a prerequisite, +# put a "!" in front of it. +# $2 - Test description +# $3 - Commands to be executed. +# +# Returns nothing. +test_expect_failure() { + test "$#" = 3 && { test_prereq=$1; shift; } || test_prereq= + test "$#" = 2 || error "bug in the test script: not 2 or 3 parameters to test_expect_failure" + export test_prereq + if ! test_skip_ "$@"; then + say >&3 "checking known breakage: $2" + if test_run_ "$2" expecting_failure; then + test_known_broken_ok_ "$1" + else + test_known_broken_failure_ "$1" + fi + fi + echo >&3 "" +} + +# Public: Run test commands and expect anything from them. Used when a +# test is not stable or not finished for some reason. +# +# When the test passed, an "ok" message is printed, but the number of +# fixed tests is not incremented. +# +# When it failed, a "not ok ... # TODO known breakage" message is +# printed, and the number of tests still broken is incremented. +# +# Failures from these tests won't cause --immediate to stop. +# +# Usually takes two arguments: +# $1 - Test description +# $2 - Commands to be executed. +# +# With three arguments, the first will be taken to be a prerequisite: +# $1 - Comma-separated list of test prerequisites. The test will be skipped if +# not all of the given prerequisites are set. To negate a prerequisite, +# put a "!" in front of it. +# $2 - Test description +# $3 - Commands to be executed. +# +# Returns nothing. +test_expect_unstable() { + test "$#" = 3 && { test_prereq=$1; shift; } || test_prereq= + test "$#" = 2 || error "bug in the test script: not 2 or 3 parameters to test_expect_unstable" + export test_prereq + if ! test_skip_ "$@"; then + say >&3 "checking unstable test: $2" + if test_run_ "$2" unstable; then + test_ok_ "$1" + else + test_known_broken_failure_ "$1" + fi + fi + echo >&3 "" +} + +# Public: Run command and ensure that it fails in a controlled way. +# +# Use it instead of "! <command>". For example, when <command> dies due to a +# segfault, test_must_fail diagnoses it as an error, while "! <command>" would +# mistakenly be treated as just another expected failure. +# +# This is one of the prefix functions to be used inside test_expect_success or +# test_expect_failure. +# +# $1.. - Command to be executed. +# +# Examples +# +# test_expect_success 'complain and die' ' +# do something && +# do something else && +# test_must_fail git checkout ../outerspace +# ' +# +# Returns 1 if the command succeeded (exit code 0). +# Returns 1 if the command died by signal (exit codes 130-192) +# Returns 1 if the command could not be found (exit code 127). +# Returns 0 otherwise. +test_must_fail() { + "$@" + exit_code=$? + if test $exit_code = 0; then + echo >&2 "test_must_fail: command succeeded: $*" + return 1 + elif test $exit_code -gt 129 -a $exit_code -le 192; then + echo >&2 "test_must_fail: died by signal: $*" + return 1 + elif test $exit_code = 127; then + echo >&2 "test_must_fail: command not found: $*" + return 1 + fi + return 0 +} + +# Public: Run command and ensure that it succeeds or fails in a controlled way. +# +# Similar to test_must_fail, but tolerates success too. Use it instead of +# "<command> || :" to catch failures caused by a segfault, for instance. +# +# This is one of the prefix functions to be used inside test_expect_success or +# test_expect_failure. +# +# $1.. - Command to be executed. +# +# Examples +# +# test_expect_success 'some command works without configuration' ' +# test_might_fail git config --unset all.configuration && +# do something +# ' +# +# Returns 1 if the command died by signal (exit codes 130-192) +# Returns 1 if the command could not be found (exit code 127). +# Returns 0 otherwise. +test_might_fail() { + "$@" + exit_code=$? + if test $exit_code -gt 129 -a $exit_code -le 192; then + echo >&2 "test_might_fail: died by signal: $*" + return 1 + elif test $exit_code = 127; then + echo >&2 "test_might_fail: command not found: $*" + return 1 + fi + return 0 +} + +# Public: Run command and ensure it exits with a given exit code. +# +# This is one of the prefix functions to be used inside test_expect_success or +# test_expect_failure. +# +# $1 - Expected exit code. +# $2.. - Command to be executed. +# +# Examples +# +# test_expect_success 'Merge with d/f conflicts' ' +# test_expect_code 1 git merge "merge msg" B master +# ' +# +# Returns 0 if the expected exit code is returned or 1 otherwise. +test_expect_code() { + want_code=$1 + shift + "$@" + exit_code=$? + if test "$exit_code" = "$want_code"; then + return 0 + fi + + echo >&2 "test_expect_code: command exited with $exit_code, we wanted $want_code $*" + return 1 +} + +# Public: Compare two files to see if expected output matches actual output. +# +# The TEST_CMP variable defines the command used for the comparison; it +# defaults to "diff -u". Only when the test script was started with --verbose, +# will the command's output, the diff, be printed to the standard output. +# +# This is one of the prefix functions to be used inside test_expect_success or +# test_expect_failure. +# +# $1 - Path to file with expected output. +# $2 - Path to file with actual output. +# +# Examples +# +# test_expect_success 'foo works' ' +# echo expected >expected && +# foo >actual && +# test_cmp expected actual +# ' +# +# Returns the exit code of the command set by TEST_CMP. +test_cmp() { + ${TEST_CMP:-diff -u} "$@" +} + +# Public: portably print a sequence of numbers. +# +# seq is not in POSIX and GNU seq might not be available everywhere, +# so it is nice to have a seq implementation, even a very simple one. +# +# $1 - Starting number. +# $2 - Ending number. +# +# Examples +# +# test_expect_success 'foo works 10 times' ' +# for i in $(test_seq 1 10) +# do +# foo || return +# done +# ' +# +# Returns 0 if all the specified numbers can be displayed. +test_seq() { + i="$1" + j="$2" + while test "$i" -le "$j" + do + echo "$i" || return + i=$(("$i" + 1)) + done +} + +# Public: Check if the file expected to be empty is indeed empty, and barfs +# otherwise. +# +# $1 - File to check for emptiness. +# +# Returns 0 if file is empty, 1 otherwise. +test_must_be_empty() { + if test -s "$1" + then + echo "'$1' is not empty, it contains:" + cat "$1" + return 1 + fi +} + +# debugging-friendly alternatives to "test [-f|-d|-e]" +# The commands test the existence or non-existence of $1. $2 can be +# given to provide a more precise diagnosis. +test_path_is_file () { + if ! test -f "$1" + then + echo "File $1 doesn't exist. $2" + false + fi +} + +test_path_is_dir () { + if ! test -d "$1" + then + echo "Directory $1 doesn't exist. $2" + false + fi +} + +# Check if the directory exists and is empty as expected, barf otherwise. +test_dir_is_empty () { + test_path_is_dir "$1" && + if test -n "$(find "$1" -mindepth 1 -maxdepth 1)" + then + echo "Directory '$1' is not empty, it contains:" + ls -la "$1" + return 1 + fi +} + +# Public: Schedule cleanup commands to be run unconditionally at the end of a +# test. +# +# If some cleanup command fails, the test will not pass. With --immediate, no +# cleanup is done to help diagnose what went wrong. +# +# This is one of the prefix functions to be used inside test_expect_success or +# test_expect_failure. +# +# $1.. - Commands to prepend to the list of cleanup commands. +# +# Examples +# +# test_expect_success 'test core.capslock' ' +# git config core.capslock true && +# test_when_finished "git config --unset core.capslock" && +# do_something +# ' +# +# Returns the exit code of the last cleanup command executed. +test_when_finished() { + test_cleanup="{ $* + } && (exit \"\$eval_ret\"); eval_ret=\$?; $test_cleanup" +} + +# Public: Schedule cleanup commands to be run unconditionally when all tests +# have run. +# +# This can be used to clean up things like test databases. It is not needed to +# clean up temporary files, as test_done already does that. +# +# Examples: +# +# cleanup mysql -e "DROP DATABASE mytest" +# +# Returns the exit code of the last cleanup command executed. +final_cleanup= +cleanup() { + final_cleanup="{ $* + } && (exit \"\$eval_ret\"); eval_ret=\$?; $final_cleanup" +} + +# Public: Summarize test results and exit with an appropriate error code. +# +# Must be called at the end of each test script. +# +# Can also be used to stop tests early and skip all remaining tests. For this, +# set skip_all to a string explaining why the tests were skipped before calling +# test_done. +# +# Examples +# +# # Each test script must call test_done at the end. +# test_done +# +# # Skip all remaining tests if prerequisite is not set. +# if ! test_have_prereq PERL; then +# skip_all='skipping perl interface tests, perl not available' +# test_done +# fi +# +# Returns 0 if all tests passed or 1 if there was a failure. +test_done() { + EXIT_OK=t + + if test -z "$HARNESS_ACTIVE"; then + test_results_dir="$SHARNESS_TEST_OUTDIR/test-results" + mkdir -p "$test_results_dir" + test_results_path="$test_results_dir/$this_test.$$.counts" + + cat >>"$test_results_path" <<-EOF + total $SHARNESS_TEST_NB + success $test_success + fixed $test_fixed + broken $test_broken + failed $test_failure + + EOF + fi + + if test "$test_fixed" != 0; then + say_color error "# $test_fixed known breakage(s) vanished; please update test(s)" + fi + if test "$test_broken" != 0; then + say_color warn "# still have $test_broken known breakage(s)" + fi + if test "$test_broken" != 0 || test "$test_fixed" != 0; then + test_remaining=$((SHARNESS_TEST_NB - test_broken - test_fixed)) + msg="remaining $test_remaining test(s)" + else + test_remaining=$SHARNESS_TEST_NB + msg="$SHARNESS_TEST_NB test(s)" + fi + + case "$test_failure" in + 0) + # Maybe print SKIP message + check_skip_all_ + if test "$test_remaining" -gt 0; then + say_color pass "# passed all $msg" + fi + say "1..$SHARNESS_TEST_NB$skip_all" + + test_eval_ "$final_cleanup" + + remove_trash_ + + exit 0 ;; + + *) + say_color error "# failed $test_failure among $msg" + say "1..$SHARNESS_TEST_NB" + + exit 1 ;; + + esac +} |