Add test checking org-log-done specs

* testing/lisp/test-org.el (test-org/org-log-done): New test

testing/lisp/test-org.el

@@ -7433,6 +7433,132 @@ SCHEDULED: <2021-06-15 Tue +1d>"
           (org-add-log-note))
         (buffer-string))))))
 
+(ert-deftest test-org/org-log-done ()
+  "Test `org-log-done' specifications."
+  ;; nil value.
+  (should
+   (string=
+    "* DONE task"
+    (let ((org-log-done nil)
+          (org-todo-keywords '((sequence "TODO" "DONE"))))
+      (org-test-with-temp-text
+          "* TODO task"
+        (org-todo "DONE")
+        (when (memq 'org-add-log-note post-command-hook)
+          (org-add-log-note))
+        (buffer-string)))))
+  ;; `time' value.
+  (should
+   (string=
+    (format
+    "* DONE task
+CLOSED: %s"
+    (org-test-with-temp-text ""
+      (org-insert-time-stamp (current-time) t t)
+      (buffer-string)))
+    (let ((org-log-done 'time)
+          (org-log-done-with-time t)
+          (org-todo-keywords '((sequence "TODO" "DONE"))))
+      (org-test-with-temp-text
+          "* TODO task"
+        (org-todo "DONE")
+        (when (memq 'org-add-log-note post-command-hook)
+          (org-add-log-note))
+        (buffer-string)))))
+  (should
+   (string=
+    (format
+    "* DONE task
+CLOSED: %s"
+    (org-test-with-temp-text ""
+      (org-insert-time-stamp (current-time) nil t)
+      (buffer-string)))
+    (let ((org-log-done 'time)
+          (org-log-done-with-time nil)
+          (org-todo-keywords '((sequence "TODO" "DONE"))))
+      (org-test-with-temp-text
+          "* TODO task"
+        (org-todo "DONE")
+        (when (memq 'org-add-log-note post-command-hook)
+          (org-add-log-note))
+        (buffer-string)))))
+  ;; TODO: Test `note' value.
+  ;; Test startup overrides.
+  (should
+   (string=
+    "#+STARTUP: nologdone
+* DONE task"
+    (let ((org-log-done 'time)
+          (org-todo-keywords '((sequence "TODO" "DONE"))))
+      (org-test-with-temp-text
+          "#+STARTUP: nologdone
+<point>* TODO task"
+        (org-set-regexps-and-options)
+        (org-todo "DONE")
+        (when (memq 'org-add-log-note post-command-hook)
+          (org-add-log-note))
+        (buffer-string)))))
+  (should
+   (string=
+    (format
+    "#+STARTUP: logdone
+* DONE task
+CLOSED: %s"
+    (org-test-with-temp-text ""
+      (org-insert-time-stamp (current-time) t t)
+      (buffer-string)))
+    (let ((org-log-done nil)
+          (org-log-done-with-time t)
+          (org-todo-keywords '((sequence "TODO" "DONE"))))
+      (org-test-with-temp-text
+          "#+STARTUP: logdone
+<point>* TODO task"
+        (org-set-regexps-and-options)
+        (org-todo "DONE")
+        (when (memq 'org-add-log-note post-command-hook)
+          (org-add-log-note))
+        (buffer-string)))))
+  ;; Test local property overrides.
+  (should
+   (string=
+    "* DONE task
+:PROPERTIES:
+:LOGGING: nil
+:END:"
+    (let ((org-log-done 'time)
+          (org-todo-keywords '((sequence "TODO" "DONE"))))
+      (org-test-with-temp-text
+          "* TODO task
+:PROPERTIES:
+:LOGGING: nil
+:END:"
+        (org-todo "DONE")
+        (when (memq 'org-add-log-note post-command-hook)
+          (org-add-log-note))
+        (buffer-string)))))
+  (should
+   (string=
+    (format
+    "* DONE task
+CLOSED: %s
+:PROPERTIES:
+:LOGGING: logdone
+:END:"
+    (org-test-with-temp-text ""
+      (org-insert-time-stamp (current-time) t t)
+      (buffer-string)))
+    (let ((org-log-done nil)
+          (org-log-done-with-time t)
+          (org-todo-keywords '((sequence "TODO" "DONE"))))
+      (org-test-with-temp-text
+          "* TODO task
+:PROPERTIES:
+:LOGGING: logdone
+:END:"
+        (org-todo "DONE")
+        (when (memq 'org-add-log-note post-command-hook)
+          (org-add-log-note))
+        (buffer-string))))))
 
 
 ;;; Timestamps API