test: Unit tests for CheckoutSummary component (#11061)

* test: Unit tests for CheckoutSummary component

* Added changeset: Unit tests for CheckoutSummary component

packages/manager/.changeset/pr-11061-tests-1728374977579.md

@@ -0,0 +1,5 @@
+---
+"@linode/manager": Tests
+---
+
+Unit tests for CheckoutSummary component ([#11061](https://github.com/linode/manager/pull/11061))

packages/manager/src/components/CheckoutSummary/CheckoutSummary.test.tsx

@@ -0,0 +1,45 @@
+import React from 'react';
+
+import { renderWithTheme } from 'src/utilities/testHelpers';
+
+import { CheckoutSummary } from './CheckoutSummary';
+
+import type { CheckoutSummaryProps } from './CheckoutSummary';
+
+const defaultArgs: CheckoutSummaryProps = {
+  displaySections: [
+    { title: 'Debian 11' },
+    { details: '$36/month', title: 'Dedicated 4GB' },
+  ],
+  heading: 'Checkout Summary',
+};
+
+describe('CheckoutSummary', () => {
+  it('should render heading and display section', () => {
+    const { getByText } = renderWithTheme(<CheckoutSummary {...defaultArgs} />);
+
+    expect(getByText('Checkout Summary')).toBeVisible();
+    expect(getByText('Debian 11')).toBeVisible();
+  });
+
+  it('should render children if provided', () => {
+    const { getByText } = renderWithTheme(
+      <CheckoutSummary {...defaultArgs}>
+        <div>Child items can go here!</div>
+      </CheckoutSummary>
+    );
+
+    expect(getByText('Child items can go here!')).toBeInTheDocument();
+  });
+
+  it('should render agreement if provided', () => {
+    const { getByText } = renderWithTheme(
+      <CheckoutSummary
+        {...defaultArgs}
+        agreement={<div>Agreement item can go here!</div>}
+      />
+    );
+
+    expect(getByText('Agreement item can go here!')).toBeInTheDocument();
+  });
+});

packages/manager/src/components/CheckoutSummary/CheckoutSummary.tsx

@@ -10,7 +10,7 @@ import { SummaryItem } from './SummaryItem';
 
 import type { Theme } from '@mui/material/styles';
 
-interface CheckoutSummaryProps {
+export interface CheckoutSummaryProps {
   /**
    * JSX element to be displayed as an agreement section.
    */