[PATCH 3/4] t0000: run cleaning test inside sub-test

From: Jeff King <peff@peff.net>
Date: Nov 20, 2020, 00:22 UTC
Message-ID: <20201120002247.GC307112@coredump.intra.peff.net>
In-Reply-To: <20201120001458.GA274082@coredump.intra.peff.net>

Our check of test_when_finished is done directly in the main script, and if we failed to clean, we complain and exit immediately. It's nicer to signal a test failure here, for a few reasons:

  - this gives better output to the user when run under a TAP harness
    like "prove"

  - constency; it's the only test left in the file that behaves this way

  - half of its "if" conditional is nonsense anyway; it picked up a
    reference to GIT_TEST_FAIL_PREREQS internal in dfe1a17df9 (tests:
    add a special setup where prerequisites fail, 2019-05-13) along with
    its neighbors, even though it has nothing to do with that flag

We could actually do this without a sub-test at all, and just put our two tests (one to do cleanup, and one to check that it happened) in the main script. But doing it in a subtest is conceptually cleaner (from the perspective of the main test script, we are checking only one thing), and it remains consistent with the "cleanup when failing" test directly after it, which has to happen in a sub-test (to avoid the main script complaining of the failed test).

Signed-off-by: Jeff King <peff@peff.net>
---
 t/t0000-basic.sh | 25 +++++++++++++++++--------
 1 file changed, 17 insertions(+), 8 deletions(-)

diff --git a/t/t0000-basic.sh b/t/t0000-basic.sh
index 3d36a87610..502375bdf6 100755
--- a/t/t0000-basic.sh
+++ b/t/t0000-basic.sh
@@ -852,16 +852,25 @@ test_expect_success 'lazy prereqs do not turn off tracing' "
 	grep 'echo trace' lazy-prereq-and-tracing/err
 "
 
-clean=no
 test_expect_success 'tests clean up after themselves' '
-	test_when_finished clean=yes
-'
+	run_sub_test_lib_test cleanup "test with cleanup" <<-\EOF &&
+	clean=no
+	test_expect_success "do cleanup" "
+		test_when_finished clean=yes
+	"
+	test_expect_success "cleanup happened" "
+		test $clean = yes
+	"
+	test_done
+	EOF
 
-if test -z "$GIT_TEST_FAIL_PREREQS_INTERNAL" -a $clean != yes
-then
-	say "bug in test framework: basic cleanup command does not work reliably"
-	exit 1
-fi
+	check_sub_test_lib_test cleanup <<-\EOF
+	ok 1 - do cleanup
+	ok 2 - cleanup happened
+	# passed all 2 test(s)
+	1..2
+	EOF
+'
 
 test_expect_success 'tests clean up even on failures' "
 	run_sub_test_lib_test_err \

-- 
2.29.2.730.g3e418f96ba