CCM-11492 Update tests + coverage

Author: nicki-nhs

frontend/src/__tests__/components/molecules/ContentRenderer.test.tsx

@@ -13,6 +13,11 @@ describe('ContentRenderer', () => {
     expect(container).toBeEmptyDOMElement();
   });
 
+  it('renders a plain string as MarkdownContent in inline mode', () => {
+    render(<ContentRenderer content='Just a string block' />);
+    expect(screen.getByText('Just a string block')).toBeInTheDocument();
+  });
+
   it('throws an error for an unsupported block type', () => {
     const invalidContent = [
       { type: 'test', value: 'invalid' },

frontend/src/__tests__/components/organisms/MessagePlanChannelList.test.tsx

@@ -6,7 +6,7 @@ import type {
   Channel,
   TemplateDto,
 } from 'nhs-notify-backend-client';
-import { MessagePlanTemplates } from '@app/message-plans/choose-templates/[routingConfigId]/page';
+import { MessagePlanTemplates } from '@utils/message-plans';
 
 function buildRoutingConfig(channels: Channel[]): RoutingConfig {
   const now = new Date().toISOString();
@@ -91,6 +91,21 @@ describe('MessagePlanChannelList', () => {
     expect(container.querySelector('ul.channel-list')!.children.length).toBe(0);
   });
 
+  it('should handle cascade item without a template', () => {
+    const messagePlan = buildRoutingConfig(['NHSAPP']);
+    messagePlan.cascade[0].defaultTemplateId = undefined;
+
+    expect(() => {
+      render(
+        <MessagePlanChannelList
+          messagePlan={messagePlan}
+          templates={testTemplates}
+        />
+      );
+    }).not.toThrow();
+    expect(screen.getByTestId('message-plan-block-NHSAPP')).toBeInTheDocument();
+  });
+
   it('should match snapshot for a digital routing plan', () => {
     const messagePlan = buildRoutingConfig(['NHSAPP', 'EMAIL', 'SMS']);
 

frontend/src/components/molecules/ContentRenderer/ContentRenderer.tsx

@@ -28,7 +28,7 @@ interface ContentRendererProps {
 
 export function ContentRenderer({ content, variables }: ContentRendererProps) {
   const items: ContentItem[] =
-    typeof content === 'string' ? [content] : (content ?? []);
+    typeof content === 'string' ? [content] : content;
   if (items.length === 0) return null;
 
   return (