Backport two custom Behat steps which were part of upgrade commits bu…

…t which should be part of legacy branches as well

tests/behat/behat_theme_boost_union_base_general.php

@@ -58,6 +58,29 @@ public function dom_element_should_have_computed_style($selector, $style, $value
         }
     }
 
+    /**
+     * Checks if the given DOM element does not have the given computed style.
+     *
+     * @copyright 2024 Alexander Bias <[email protected]>
+     * @Then DOM element :arg1 should not have computed style :arg2 :arg3
+     * @param string $selector
+     * @param string $style
+     * @param string $value
+     * @throws ExpectationException
+     */
+    public function dom_element_should_not_have_computed_style($selector, $style, $value) {
+        $stylejs = "
+            return (
+                window.getComputedStyle(document.querySelector('$selector')).getPropertyValue('$style')
+            )
+        ";
+        $computedstyle = $this->evaluate_script($stylejs);
+        if ($computedstyle == $value) {
+            throw new ExpectationException('The \''.$selector.'\' DOM element does have the computed style \''.
+                $style.'\'=\''.$computedstyle.'\', but it should not have it.', $this->getSession());
+        }
+    }
+
     /**
      * Checks if the given DOM element has a background image with the given file name.
      *
@@ -280,6 +303,15 @@ public function purge_theme_cache_and_reload_theme() {
         theme_reset_all_caches();
     }
 
+    /**
+     * Purges all caches
+     *
+     * @Given /^all caches are purged$/
+     */
+    public function purge_all_caches() {
+        purge_caches();
+    }
+
     /**
      * Disables debugging in Behat.
      *