test(AIInsightsSkeleton): add type compiler tests

components/dashboard/AIInsightsSkeleton.type-compiler.test.tsx

@@ -0,0 +1,52 @@
+import React, { ComponentProps } from 'react';
+import '@testing-library/jest-dom/vitest';
+import { render } from '@testing-library/react';
+import { describe, expect, it, expectTypeOf } from 'vitest';
+import AIInsightsSkeleton from './AIInsightsSkeleton';
+
+describe('AIInsightsSkeleton - TypeScript Compiler Validation & Schema Constraints Stability', () => {
+  // 1. Validate exported interfaces and component prop types using expectTypeOf.
+  it('validates the component signature and prop types using expectTypeOf', () => {
+    // Verify AIInsightsSkeleton is a function component
+    expectTypeOf(AIInsightsSkeleton).toBeFunction();
+
+    // Verify it doesn't require any props (accepts empty object)
+    type ComponentPropsType = ComponentProps<typeof AIInsightsSkeleton>;
+    expectTypeOf<ComponentPropsType>().toEqualTypeOf<unknown>();
+  });
+
+  // 2. Verify required properties remain required and optional properties remain optional.
+  it('verifies required and optional parameters remain stable', () => {
+    type Params = Parameters<typeof AIInsightsSkeleton>;
+
+    // The component has no required parameters (length of params array is 0)
+    expectTypeOf<Params['length']>().toEqualTypeOf<0>();
+  });
+
+  // 3. Assert invalid prop shapes or incompatible types are rejected at compile time using // @ts-expect-error where appropriate.
+  it('asserts that invalid prop shapes are rejected at compile time', () => {
+    // @ts-expect-error - AIInsightsSkeleton does not accept arguments
+    const element = <AIInsightsSkeleton invalidProp="test" />;
+    expect(element).toBeDefined();
+
+    // Check that we cannot pass parameters using expectTypeOf
+    expectTypeOf<Parameters<typeof AIInsightsSkeleton>>().not.toEqualTypeOf<[string]>();
+  });
+
+  // 4. Verify optional values, partial objects, and undefined-compatible fields compile successfully without runtime failures.
+  it('verifies parameterless invocation compiles successfully and renders without runtime failures', () => {
+    const { container } = render(<AIInsightsSkeleton />);
+    expect(container.firstChild).toBeInTheDocument();
+
+    // Verify typescript compiler validates empty parameter arrays are compatible
+    const emptyArgs: [] = [];
+    const element = AIInsightsSkeleton(...emptyArgs);
+    expect(element).toBeDefined();
+  });
+
+  // 5. Validate any associated schemas or type constraints remain stable and enforce expected field configurations.
+  it('validates component return type constraints remain stable', () => {
+    type JSXElement = React.JSX.Element;
+    expectTypeOf<ReturnType<typeof AIInsightsSkeleton>>().toMatchTypeOf<JSXElement>();
+  });
+});