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-rw-r--r--t/README6
-rw-r--r--t/test-lib-functions.sh11
2 files changed, 17 insertions, 0 deletions
diff --git a/t/README b/t/README
index 29f72354bf..2353a4c5e1 100644
--- a/t/README
+++ b/t/README
@@ -466,6 +466,12 @@ explicitly providing repositories when accessing submodule objects is
complete or needs to be abandoned for whatever reason (in which case the
migrated codepaths still retain their performance benefits).
+GIT_TEST_REQUIRE_PREREQ=<list> allows specifying a space speparated list of
+prereqs that are required to succeed. If a prereq in this list is triggered by
+a test and then fails then the whole test run will abort. This can help to make
+sure the expected tests are executed and not silently skipped when their
+dependency breaks or is simply not present in a new environment.
+
Naming Tests
------------
diff --git a/t/test-lib-functions.sh b/t/test-lib-functions.sh
index eef2262a36..389153e591 100644
--- a/t/test-lib-functions.sh
+++ b/t/test-lib-functions.sh
@@ -680,6 +680,17 @@ test_have_prereq () {
# Keep a list of missing prerequisites; restore
# the negative marker if necessary.
prerequisite=${negative_prereq:+!}$prerequisite
+
+ # Abort if this prereq was marked as required
+ if test -n "$GIT_TEST_REQUIRE_PREREQ"
+ then
+ case " $GIT_TEST_REQUIRE_PREREQ " in
+ *" $prerequisite "*)
+ BAIL_OUT "required prereq $prerequisite failed"
+ ;;
+ esac
+ fi
+
if test -z "$missing_prereq"
then
missing_prereq=$prerequisite