tests: add a PATH-sanity-check to help-version

* tests/misc/help-version: Sync from gzip's version.
* tests/check.mk (TESTS_ENVIRONMENT): Export VERSION, as required
for new help-version test.

2 files changed, 15 insertions, 1 deletions

diff --git a/tests/check.mk b/tests/check.mk
index d3b08e095..df0c92467 100644
--- a/tests/check.mk
+++ b/tests/check.mk
@@ -69,6 +69,7 @@ TESTS_ENVIRONMENT =				\
     fi;						\
   };						\
   export					\
+  VERSION='$(VERSION)'				\
   LOCALE_FR='$(LOCALE_FR)'			\
   LOCALE_FR_UTF8='$(LOCALE_FR_UTF8)'		\
   abs_top_builddir='$(abs_top_builddir)'	\
diff --git a/tests/misc/help-version b/tests/misc/help-version
index 976d18a31..ea16516c9 100755
--- a/tests/misc/help-version
+++ b/tests/misc/help-version
@@ -58,7 +58,20 @@ expected_failure_status_egrep=2
 expected_failure_status_fgrep=2
 
 test "$built_programs" \
-  || { echo "$this_test: no programs built!?!" 1>&2; Exit 1; }
+  || fail_ "built_programs not specified!?!"
+
+test "$VERSION" \
+  || fail_ "set envvar VERSION; it is required for a PATH sanity-check"
+
+# Extract version from --version output of the first program
+for i in $built_programs; do
+  v=$(env $i --version | sed -n '1s/.* //p;q')
+  break
+done
+
+# Ensure that it matches $VERSION.
+test "x$v" = "x$VERSION" \
+  || fail_ "--version-\$VERSION mismatch"
 
 for lang in C fr da; do
   for i in $built_programs; do