Add visible: any option to query (#412)

lib/wallaby/browser.ex

@@ -857,9 +857,14 @@ defmodule Wallaby.Browser do
   end
 
   defp validate_visibility(query, elements) do
-    visible = Query.visible?(query)
-
-    {:ok, Enum.filter(elements, &(Element.visible?(&1) == visible))}
+    case Query.visible?(query) do
+      :any ->
+        {:ok, elements}
+      true ->
+        {:ok, Enum.filter(elements, &(Element.visible?(&1)))}
+      false ->
+        {:ok, Enum.reject(elements, &(Element.visible?(&1)))}
+    end
   end
 
   defp validate_selected(query, elements) do

lib/wallaby/query.ex

@@ -106,7 +106,7 @@ defmodule Wallaby.Query do
   @type conditions :: [
     count: non_neg_integer,
     text: String.t,
-    visible: boolean(),
+    visible: boolean() | :any,
     selected: boolean() | :any,
     minimum: non_neg_integer,
     at: pos_integer
@@ -395,7 +395,7 @@ defmodule Wallaby.Query do
     cond do
       query.conditions[:minimum] > query.conditions[:maximum] ->
         {:error, :min_max}
-      !Query.visible?(query) && Query.inner_text(query) ->
+      (Query.visible?(query) != true) && Query.inner_text(query) ->
         {:error, :cannot_set_text_with_invisible_elements}
       true ->
         {:ok, query}

lib/wallaby/query/error_message.ex

@@ -189,10 +189,10 @@ defmodule Wallaby.Query.ErrorMessage do
   @spec visibility(Query.t) :: String.t
 
   def visibility(query) do
-    if Query.visible?(query) do
-      "visible"
-    else
-      "invisible"
+    case Query.visible?(query) do
+      true -> "visible"
+      false -> "invisible"
+      :any -> "visible or invisible"
     end
   end