test: add type compiler tests for PreviewPanel

app/generator/components/PreviewPanel.type-compiler.test.tsx

@@ -0,0 +1,48 @@
+import { describe, it, expectTypeOf, expect } from 'vitest';
+import React from 'react';
+import { PreviewPanel } from './PreviewPanel';
+
+describe('PreviewPanel Type Compiler Validation', () => {
+  it('exports PreviewPanel as a callable React component', () => {
+    expectTypeOf<typeof PreviewPanel>().toBeFunction();
+  });
+
+  it('accepts component props', () => {
+    type Props = React.ComponentProps<typeof PreviewPanel>;
+
+    expectTypeOf<Props>().toMatchObjectType<{
+      markdown: string;
+    }>();
+  });
+
+  it('preserves component prop schema', () => {
+    type Props = React.ComponentProps<typeof PreviewPanel>;
+
+    expectTypeOf<Props['markdown']>().toEqualTypeOf<string>();
+  });
+
+  it('supports compile-time validation for component props', () => {
+    const validProps: React.ComponentProps<typeof PreviewPanel> = {
+      markdown: '# Hello World',
+    };
+
+    expect(validProps.markdown).toBe('# Hello World');
+
+    const invalidProps: React.ComponentProps<typeof PreviewPanel> = {
+      // @ts-expect-error - markdown must be a string
+      markdown: 123,
+    };
+
+    expect(invalidProps).toBeDefined();
+
+    expect(invalidProps).toBeDefined();
+  });
+
+  it('accepts a valid props object', () => {
+    const props: React.ComponentProps<typeof PreviewPanel> = {
+      markdown: 'Sample markdown',
+    };
+
+    expect(props.markdown).toBe('Sample markdown');
+  });
+});