Add tests for count-lines

* test/lisp/simple-tests.el (simple-test-count-lines)
(simple-test-count-lines/ignore-invisible-lines): Add tests.

1 files changed, 20 insertions, 0 deletions

diff --git a/test/lisp/simple-tests.el b/test/lisp/simple-tests.el
index 7b022811a5c..b4007a6c3f3 100644
--- a/test/lisp/simple-tests.el
+++ b/test/lisp/simple-tests.el
@@ -48,6 +48,26 @@
     (should (= (count-words (point-min) (point-max)) 10))))
 
 
+;;; `count-lines'
+
+(ert-deftest simple-test-count-lines ()
+  (with-temp-buffer
+    (should (= (count-lines (point-min) (point-max)) 0))
+    (insert "foo")
+    (should (= (count-lines (point-min) (point-max)) 1))
+    (insert "\nbar\nbaz\n")
+    (should (= (count-lines (point-min) (point-max)) 3))
+    (insert "r\n")
+    (should (= (count-lines (point-min) (point-max)) 4))))
+
+(ert-deftest simple-test-count-lines/ignore-invisible-lines ()
+  (with-temp-buffer
+    (insert "foo\nbar")
+    (should (= (count-lines (point-min) (point-max) t) 2))
+    (insert (propertize "\nbar\nbaz\nzut" 'invisible t))
+    (should (= (count-lines (point-min) (point-max) t) 2))))
+
+
 ;;; `transpose-sexps'
 (defmacro simple-test--transpositions (&rest body)
   (declare (indent 0)