MOBILE-3947 behat: Reimplement wait

The behaviour of wait for new versions has changed, so we need to implement it ourselves. See oleg-andreyev/MinkPhpWebDriver#81

local_moodleappbehat/tests/behat/behat_app.php

@@ -214,10 +214,7 @@ public function i_scroll_to_in_the_app(string $locator) {
             return true;
         });
 
-        $this->wait_for_pending_js();
-
-        // Wait scroll animation to finish.
-        $this->getSession()->wait(300);
+        $this->wait_animations_done();
     }
 
     /**
@@ -263,10 +260,7 @@ public function i_swipe_in_the_app(string $direction, bool $hasLocator = false,
             throw new DriverException('Error when swiping - ' . $result);
         }
 
-        $this->wait_for_pending_js();
-
-        // Wait swipe animation to finish.
-        $this->getSession()->wait(300);
+        $this->wait_animations_done();
     }
 
     /**
@@ -689,10 +683,7 @@ public function i_pull_to_refresh_in_the_app(?string $locator = null) {
                 return true;
             });
 
-            $this->wait_for_pending_js();
-
-            // Wait for UI to settle after refreshing.
-            $this->getSession()->wait(300);
+            $this->wait_animations_done();
 
             if (is_null($locator)) {
                 return;

local_moodleappbehat/tests/behat/behat_app_helper.php

@@ -641,4 +641,15 @@ protected function transform_time_to_string(string $text): string {
             return $text;
         }
     }
+
+    /**
+     * Wait until animations have finished.
+     */
+    protected function wait_animations_done() {
+        $this->wait_for_pending_js();
+
+        // Ideally, we wouldn't wait a fixed amount of time. But it is not straightforward to wait for animations
+        // to finish, so for now we'll just wait 300ms.
+        usleep(300000);
+    }
 }