Added prompt unit tests

Author: DeDuckProject

tests/unit/prompts.test.ts

@@ -0,0 +1,74 @@
+import { describe, it, expect } from 'vitest';
+import {
+  buildScriptGenerationPrompt,
+  buildGeneralDemoPrompt,
+} from '../../packages/core/src/generator/prompts.js';
+import type { ScriptPromptOptions } from '../../packages/core/src/generator/prompts.js';
+
+const BASE_OPTIONS: ScriptPromptOptions = {
+  baseUrl: 'http://localhost:3000',
+  diff: 'diff --git a/src/Button.tsx b/src/Button.tsx\n+export function Button() {}',
+  routes: [{ route: '/', file: 'src/Button.tsx' }],
+  demoFlow: 'Navigate to home and click the button',
+  maxDuration: 30,
+  viewport: { width: 1280, height: 720 },
+};
+
+describe('buildScriptGenerationPrompt', () => {
+  it('includes hint under App-specific notes when provided', () => {
+    const prompt = buildScriptGenerationPrompt({
+      ...BASE_OPTIONS,
+      hint: 'Log in with demo@example.com / password',
+    });
+    expect(prompt).toContain('## App-specific notes');
+    expect(prompt).toContain('Log in with demo@example.com / password');
+  });
+
+  it('omits App-specific notes section when hint is not provided', () => {
+    const prompt = buildScriptGenerationPrompt(BASE_OPTIONS);
+    expect(prompt).not.toContain('## App-specific notes');
+  });
+
+  it('omits App-specific notes section when hint is empty string', () => {
+    const prompt = buildScriptGenerationPrompt({ ...BASE_OPTIONS, hint: '' });
+    expect(prompt).not.toContain('## App-specific notes');
+  });
+
+  it('places hint before the Diff section', () => {
+    const prompt = buildScriptGenerationPrompt({
+      ...BASE_OPTIONS,
+      hint: 'my hint',
+    });
+    const hintPos = prompt.indexOf('## App-specific notes');
+    const diffPos = prompt.indexOf('## Diff');
+    expect(hintPos).toBeGreaterThan(-1);
+    expect(hintPos).toBeLessThan(diffPos);
+  });
+});
+
+describe('buildGeneralDemoPrompt', () => {
+  const BASE_GENERAL = {
+    baseUrl: 'http://localhost:3000',
+    maxDuration: 30,
+    viewport: { width: 1280, height: 720 },
+  };
+
+  it('includes hint under App-specific notes when provided', () => {
+    const prompt = buildGeneralDemoPrompt({
+      ...BASE_GENERAL,
+      hint: 'Use test account admin / secret',
+    });
+    expect(prompt).toContain('## App-specific notes');
+    expect(prompt).toContain('Use test account admin / secret');
+  });
+
+  it('omits App-specific notes section when hint is not provided', () => {
+    const prompt = buildGeneralDemoPrompt(BASE_GENERAL);
+    expect(prompt).not.toContain('## App-specific notes');
+  });
+
+  it('omits App-specific notes section when hint is empty string', () => {
+    const prompt = buildGeneralDemoPrompt({ ...BASE_GENERAL, hint: '' });
+    expect(prompt).not.toContain('## App-specific notes');
+  });
+});