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-rw-r--r--test/src/data-tests.el3
1 files changed, 3 insertions, 0 deletions
diff --git a/test/src/data-tests.el b/test/src/data-tests.el
index dd6ce196f96..561b7bd9ca6 100644
--- a/test/src/data-tests.el
+++ b/test/src/data-tests.el
@@ -587,4 +587,7 @@ comparing the subr with a much slower lisp implementation."
(should (< (1- most-negative-fixnum) most-negative-fixnum))
(should (fixnump (1- (1+ most-positive-fixnum)))))
+(ert-deftest data-tests-logcount ()
+ (should (= (logcount (read "#xffffffffffffffffffffffffffffffff")) 128)))
+
;;; data-tests.el ends here