Rollback our work on displayed? api function

We have learned that displayed-ness is more complex than we had
originally imagined. It requires more research and maybe more hammock
time.

Effectively rolls back PR clj-commons#445 for issue clj-commons#444.

CHANGELOG.adoc

@@ -112,7 +112,6 @@ That said, for Etaoin users who have adopted and prefer the api2 versions, they
 This will allow for easier testing of unreleased versions of Etaoin via git deps.
 It also unconvered that our minimum Clojure version was 1.10, instead of the advertised v1.9.
 Fixed.
-* https://github.com/clj-commons/etaoin/issues/444[#444]: Visibility checks fixed for firefox and chrome (thanks https://github.com/daveyarwood[@daveyarwood]!)
 * https://github.com/clj-commons/etaoin/issues/455[#455]: Automatically create specified parent dirs for screenshots
 * https://github.com/clj-commons/etaoin/issues/469[#469]: Include WebDriver process liveness in http client exception
 * https://github.com/clj-commons/etaoin/issues/446[#446]: Bump Etaoin dependencies to current releases

env/test/resources/html/test.html

@@ -50,8 +50,7 @@ <h3>Select section</h3>
             <option value="rf">Russia</option>
             <option value="usa">United States</option>
             <option value="uk">United Kingdom</option>
-            <option id="option-visible" value="fr">France</option>
-            <option id="option-hidden" style="display: none" value="nowhere">Nowhere</option>
+            <option value="fr">France</option>
         </select>
         <label for="cars">Choose a car:</label>
         <select name="cars" id="cars" multiple>

src/etaoin/api.clj

@@ -2289,28 +2289,34 @@
        :arglists '([driver q & more])}
   absent? (complement exists?))
 
-;; TODO: I think we might have broken this! @lread
-(defn- effectively-displayed?
-  [driver el]
-  {:pre [(some? el)]}
-  (and (not= "none" (get-element-css-el driver el :display))
-       (not= "hidden" (get-element-css-el driver el :visibility))))
-
 (defmulti displayed-el?
-  "Return true if `driver` finds `el` is effectively displayed/visible.
+  "Return true if `driver` finds `el` is displayed/visible.
 
   See [[query]] for details on `q`.
 
-  Rather than checking the browser native `displayed` implementation, which
-  isn't 100% reliable, we are taking a pragmatic approach by checking the
-  `display` and `visibility` CSS properties."
+  Note: Safari webdriver has not implemented `displayed`, for it
+  we currently default to some naive CSS display/visibilty checks."
   {:arglists '([driver el])}
   dispatch-driver)
 
 (defmethod displayed-el? :default
   [driver el]
   {:pre [(some? el)]}
-  (effectively-displayed? driver el))
+  (:value (execute {:driver driver
+                    :method :get
+                    :path   [:session (:session driver) :element el :displayed]})))
+
+(defmethod displayed-el? :safari
+  [driver el]
+  {:pre [(some? el)]}
+  (cond
+    (= (get-element-css-el driver el :display)
+       "none")
+    false
+    (= (get-element-css-el driver el :visibility)
+       "hidden")
+    false
+    :else true))
 
 (defn displayed?
   "Return true if element found by `driver` with query `q` is effectively displayed."

test/etaoin/api_test.clj

@@ -76,10 +76,8 @@
 (deftest test-visible
   (doto *driver*
     (-> (e/visible? {:id :button-visible}) is)
-    (-> (e/visible? {:id :option-visible}) is)
     (-> (e/invisible? {:id :button-hidden}) is)
     (-> (e/invisible? {:id :div-hidden}) is)
-    (-> (e/invisible? {:id :option-hidden}) is)
     (-> (e/invisible? {:id :dunno-foo-bar}) is)))
 
 (deftest test-select