MDL-59470 behat: Add a element comtains x occurrences step

lib/tests/behat/behat_general.php

@@ -1799,4 +1799,41 @@ public function i_click_on_skipping_visibility_check($element, $selectortype) {
         $node = $this->get_selected_node($selectortype, $element);
         $this->js_trigger_click($node);
     }
+
+    /**
+     * Checks, that the specified element contains the specified text a certain amount of times.
+     * When running Javascript tests it also considers that texts may be hidden.
+     *
+     * @Then /^I should see "(?P<elementscount_number>\d+)" occurrences of "(?P<text_string>(?:[^"]|\\")*)" in the "(?P<element_string>(?:[^"]|\\")*)" "(?P<text_selector_string>[^"]*)"$/
+     * @throws ElementNotFoundException
+     * @throws ExpectationException
+     * @param int    $elementscount How many occurrences of the element we look for.
+     * @param string $text
+     * @param string $element Element we look in.
+     * @param string $selectortype The type of element where we are looking in.
+     */
+    public function i_should_see_occurrences_of_in_element($elementscount, $text, $element, $selectortype) {
+
+        // Getting the container where the text should be found.
+        $container = $this->get_selected_node($selectortype, $element);
+
+        // Looking for all the matching nodes without any other descendant matching the
+        // same xpath (we are using contains(., ....).
+        $xpathliteral = behat_context_helper::escape($text);
+        $xpath = "/descendant-or-self::*[contains(., $xpathliteral)]" .
+                "[count(descendant::*[contains(., $xpathliteral)]) = 0]";
+
+        $nodes = $this->find_all('xpath', $xpath, false, $container);
+
+        if ($this->running_javascript()) {
+            $nodes = array_filter($nodes, function($node) {
+                return $node->isVisible();
+            });
+        }
+
+        if ($elementscount != count($nodes)) {
+            throw new ExpectationException('Found '.count($nodes).' elements in column. Expected '.$elementscount,
+                    $this->getSession());
+        }
+    }
 }