test(notification): implement notification tests

src/components/alert/bl-alert.test.ts

@@ -161,6 +161,7 @@ describe("Slot", () => {
 
     expect(el.outerHTML).to.eq('<bl-alert variant="info"></bl-alert>');
   });
+  it.todo("renders action slots from fallthrough slots");
 });
 
 describe("Events", () => {

src/components/alert/bl-alert.ts

@@ -108,9 +108,13 @@ export default class BlAlert extends LitElement {
 
     // Allow fallthrough slots. ref: bl-notification-card.ts
     if (slotElements.some(element => element.tagName === "SLOT")) {
-      slotElements = slotElements.flatMap(element =>
-        (element as HTMLSlotElement).assignedElements()
-      );
+      slotElements = slotElements.flatMap(element => {
+        if (element.tagName === "SLOT") {
+          return (element as HTMLSlotElement).assignedElements();
+        }
+
+        return element;
+      });
     }
 
     slotElements.forEach(element => {