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packages/hive-mind-core/tests/entity-normalizer.test.ts

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+import { describe, it, expect } from 'vitest';
+import { normalizeEntityName, findDuplicates } from '../src/mind/entity-normalizer.js';
+
+describe('Entity Normalizer', () => {
+  it('normalizes common abbreviations', () => {
+    expect(normalizeEntityName('NYC')).toBe('new york city');
+    expect(normalizeEntityName('JS')).toBe('javascript');
+    expect(normalizeEntityName('TS')).toBe('typescript');
+    expect(normalizeEntityName('PG')).toBe('postgresql');
+    expect(normalizeEntityName('k8s')).toBe('kubernetes');
+  });
+
+  it('finds duplicate entity groups', () => {
+    const entities = [
+      { id: '1', name: 'PostgreSQL', type: 'technology' },
+      { id: '2', name: 'Postgres', type: 'technology' },
+      { id: '3', name: 'React', type: 'technology' },
+    ];
+    const groups = findDuplicates(entities);
+    const pgGroup = groups.find(g => g.some(e => e.id === '1'));
+    expect(pgGroup).toBeDefined();
+    expect(pgGroup!.length).toBeGreaterThanOrEqual(2);
+  });
+
+  it('does not group unrelated entities', () => {
+    const entities = [
+      { id: '1', name: 'React', type: 'technology' },
+      { id: '2', name: 'Docker', type: 'technology' },
+    ];
+    const groups = findDuplicates(entities);
+    expect(groups.every(g => g.length === 1)).toBe(true);
+  });
+});