t/t7006: ignore return status of shell's unset builtin

diff --git a/t/t0000-basic.sh b/t/t0000-basic.sh
index f4ca4fc85c6b52a2ba919528284f2b668e6bd3d2..3ec9cbef2c88f65e5fb254d10cc551c6c4062c88 100755 (executable)
--- a/t/t0000-basic.sh
+++ b/t/t0000-basic.sh
@@ -73,6 +73,27 @@ then
        exit 1
 fi
 
+clean=no
+test_expect_success 'tests clean up after themselves' '
+    test_when_finished clean=yes
+'
+
+cleaner=no
+test_expect_code 1 'tests clean up even after a failure' '
+    test_when_finished cleaner=yes &&
+    (exit 1)
+'
+
+if test $clean$cleaner != yesyes
+then
+       say "bug in test framework: cleanup commands do not work reliably"
+       exit 1
+fi
+
+test_expect_code 2 'failure to clean up causes the test to fail' '
+    test_when_finished "(exit 2)"
+'
+
 ################################################################
 # Basics of the basics