test(GeneratorClient-massive-scaling): verify Massive Data Sets and E…

app/generator/GeneratorClient.massive-scaling.test.tsx

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+import { fireEvent, render, screen } from '@testing-library/react';
+import { describe, expect, it, vi } from 'vitest';
+import React from 'react';
+import { GeneratorClient } from './GeneratorClient';
+import type { ImportedData } from './utils/githubMapper';
+
+vi.mock('./components/EditorPanel', () => ({
+  EditorPanel: ({
+    onNameChange,
+    onDescriptionChange,
+    onTechsChange,
+    onSocialsChange,
+    onSocialLinkChange,
+    onGithubUsernameChange,
+    onShowCommitPulseChange,
+    onCommitPulseAccentChange,
+    onApplyImport,
+  }: {
+    onNameChange: (value: string) => void;
+    onDescriptionChange: (value: string) => void;
+    onTechsChange: (ids: string[]) => void;
+    onSocialsChange: (ids: string[]) => void;
+    onSocialLinkChange: (id: string, url: string) => void;
+    onGithubUsernameChange: (value: string) => void;
+    onShowCommitPulseChange: (value: boolean) => void;
+    onCommitPulseAccentChange: (value: string) => void;
+    onApplyImport: (data: ImportedData) => void;
+  }) => (
+    <div data-testid="editor-panel">
+      <button
+        type="button"
+        data-testid="btn-update-name"
+        onClick={() => onNameChange('CommitPulse')}
+      >
+        Update name
+      </button>
+
+      <button
+        type="button"
+        data-testid="btn-update-description"
+        onClick={() => onDescriptionChange('README generator')}
+      >
+        Update description
+      </button>
+
+      <button
+        type="button"
+        data-testid="btn-apply-import"
+        onClick={() =>
+          onApplyImport({
+            name: 'Imported Name',
+            description: 'Imported Description',
+            selectedTechs: ['react', 'nextjs'],
+            selectedSocials: ['github'],
+            socialLinks: { github: 'https://github.com/imported' },
+          })
+        }
+      >
+        Apply Import
+      </button>
+
+      <button
+        type="button"
+        data-testid="btn-huge-change"
+        onClick={() => {
+          const sampleTechs = [
+            'react',
+            'nextjs',
+            'typescript',
+            'tailwindcss',
+            'vitest',
+            'eslint',
+            'prettier',
+            'jest',
+            'webpack',
+            'babel',
+            'postcss',
+            'sass',
+          ];
+          const hugeTechs = Array.from(
+            { length: 5000 },
+            (_, i) => `${sampleTechs[i % sampleTechs.length]}-${i}`
+          );
+
+          const sampleSocials = [
+            'github',
+            'twitter',
+            'linkedin',
+            'discord',
+            'reddit',
+            'youtube',
+            'instagram',
+            'facebook',
+            'medium',
+            'devto',
+          ];
+          const hugeSocials = Array.from(
+            { length: 1000 },
+            (_, i) => `${sampleSocials[i % sampleSocials.length]}-${i}`
+          );
+
+          const hugeLinks: Record<string, string> = {};
+          hugeSocials.forEach((id) => {
+            hugeLinks[id] = `https://socialnetwork.platform.org/profiles/users/${id}`;
+          });
+
+          onTechsChange(hugeTechs);
+          onSocialsChange(hugeSocials);
+          onSocialLinkChange('github', 'https://github.com/scale-test');
+          onGithubUsernameChange('scale-user');
+          onShowCommitPulseChange(true);
+          onCommitPulseAccentChange('00ffaa');
+        }}
+      >
+        Trigger Massive State Change
+      </button>
+    </div>
+  ),
+}));
+
+vi.mock('./components/PreviewPanel', () => ({
+  PreviewPanel: ({ markdown }: { markdown: string }) => (
+    <section data-testid="preview-panel">{markdown}</section>
+  ),
+}));
+
+describe('GeneratorClient component performance and high volume data bounds', () => {
+  it('should process large arrays of tech and social items without throwing errors', () => {
+    render(<GeneratorClient />);
+
+    expect(screen.getByTestId('editor-panel')).toBeInTheDocument();
+    expect(screen.getByTestId('preview-panel')).toBeInTheDocument();
+
+    const triggerBtn = screen.getByTestId('btn-huge-change');
+    expect(() => {
+      fireEvent.click(triggerBtn);
+    }).not.toThrow();
+
+    const previewContent = screen.getByTestId('preview-panel').textContent;
+    expect(previewContent).toBeDefined();
+  });
+
+  it('should handle large string lengths on name and description properties', () => {
+    render(<GeneratorClient />);
+
+    const editorPanel = screen.getByTestId('editor-panel');
+    expect(editorPanel).toBeInTheDocument();
+
+    expect(() => {
+      const { unmount } = render(<GeneratorClient />);
+      unmount();
+    }).not.toThrow();
+  });
+
+  it('should maintain standard layout constraints and flex configuration', () => {
+    const { container } = render(<GeneratorClient />);
+
+    const firstDiv = container.firstChild as HTMLElement;
+    expect(firstDiv).toBeInTheDocument();
+    expect(firstDiv.className).toContain('flex');
+    expect(firstDiv.className).toContain('flex-col');
+  });
+
+  it('should execute rendering cycle within acceptable latency limits', () => {
+    const start = performance.now();
+    render(<GeneratorClient />);
+    const end = performance.now();
+
+    const renderDuration = end - start;
+    expect(renderDuration).toBeLessThan(1000);
+  });
+
+  it('should complete multiple render and unmount iterations consecutively', () => {
+    expect(() => {
+      for (let i = 0; i < 25; i++) {
+        const { unmount } = render(<GeneratorClient />);
+        unmount();
+      }
+    }).not.toThrow();
+  });
+});