+(defun test-redisplay-4 ()
+ (insert "Test 4: Overlay strings and invisibility:\n\n")
+ ;; Before and after strings with non-nil `invisibility'.
+ (insert " Expected: ABC\n")
+ (insert " Result: ")
+ (let ((opoint (point)))
+ (insert "ABC\n")
+ (let ((ov (make-overlay (1+ opoint) (+ 2 opoint))))
+ (overlay-put ov 'before-string
+ (propertize "XX" 'invisible
+ 'test-redisplay--simple-invis))
+ (overlay-put ov 'after-string
+ (propertize "XX" 'invisible
+ 'test-redisplay--simple-invis))))
+
+ ;; Before and after strings bogus `invisibility' property (value is
+ ;; not listed in `buffer-invisibility-spec').
+ (insert "\n Expected: ABC")
+ (insert "\n Result: ")
+ (let ((opoint (point)))
+ (insert "B\n")
+ (let ((ov (make-overlay opoint (1+ opoint))))
+ (overlay-put ov 'before-string
+ (propertize "A" 'invisible 'bogus-invis-spec))
+ (overlay-put ov 'after-string
+ (propertize "C" 'invisible 'bogus-invis-spec))))
+
+ ;; Before/after string with ellipsis `invisibility' property.
+ (insert "\n Expected: ...B...")
+ (insert "\n Result: ")
+ (let ((opoint (point)))
+ (insert "B\n")
+ (let ((ov (make-overlay opoint (1+ opoint))))
+ (overlay-put ov 'before-string
+ (propertize "A" 'invisible 'test-redisplay--ellipsis-invis))
+ (overlay-put ov 'after-string
+ (propertize "C" 'invisible 'test-redisplay--ellipsis-invis))))
+
+ ;; Before/after string with partial ellipsis `invisibility' property.
+ (insert "\n Expected: A...ABC...C")
+ (insert "\n Result: ")
+ (let ((opoint (point)))
+ (insert "B\n")
+ (let ((ov (make-overlay opoint (1+ opoint)))
+ (a "AAA")
+ (c "CCC"))
+ (put-text-property 1 2 'invisible 'test-redisplay--ellipsis-invis a)
+ (put-text-property 1 2 'invisible 'test-redisplay--ellipsis-invis c)
+ (overlay-put ov 'before-string a)
+ (overlay-put ov 'after-string c)))
+
+ ;; Display string with `invisibility' property.
+ (insert "\n Expected: ABC")
+ (insert "\n Result: ")
+ (let ((opoint (point)))
+ (insert "AYBC\n")
+ (let ((ov (make-overlay (1+ opoint) (+ 2 opoint))))
+ (overlay-put ov 'display
+ (propertize "XX" 'invisible
+ 'test-redisplay--simple-invis))))
+ ;; Display string with bogus `invisibility' property.
+ (insert "\n Expected: ABC")
+ (insert "\n Result: ")
+ (let ((opoint (point)))
+ (insert "AXC\n")
+ (let ((ov (make-overlay (1+ opoint) (+ 2 opoint))))
+ (overlay-put ov 'display
+ (propertize "B" 'invisible 'bogus-invis-spec))))
+ ;; Display string with ellipsis `invisibility' property.
+ (insert "\n Expected: A...C")
+ (insert "\n Result: ")
+ (let ((opoint (point)))
+ (insert "AXC\n")
+ (let ((ov (make-overlay (1+ opoint) (+ 2 opoint))))
+ (overlay-put ov 'display
+ (propertize "B" 'invisible
+ 'test-redisplay--ellipsis-invis))))
+ ;; Display string with partial `invisibility' property.
+ (insert "\n Expected: A...C")
+ (insert "\n Result: ")
+ (let ((opoint (point)))
+ (insert "X\n")
+ (let ((ov (make-overlay opoint (1+ opoint)))
+ (str "ABC"))
+ (put-text-property 1 2 'invisible 'test-redisplay--ellipsis-invis str)
+ (overlay-put ov 'display str)))
+
+ (insert "\n"))
+