updated design

2026-04-25 22:52:30 +01:00
parent df79ae0bca
commit e836ac6d2b
22 changed files with 3480 additions and 781 deletions
@@ -0,0 +1,90 @@
+import { describe, it, expect } from 'vitest';
+import { generatePatch } from '../src/patch.js';
+
+const A = `Component: Button
+Props:
+  size: "md"
+  variant: "primary"
+Styles:
+  background: #0066FF
+  borderRadius: 8px
+`;
+
+const B = `Component: Button
+Props:
+  size: "lg"
+  variant: "primary"
+Styles:
+  background: #0066FF
+  borderRadius: 12px
+`;
+
+describe('generatePatch', () => {
+  it('returns empty string for identical inputs', () => {
+    expect(generatePatch(A, A)).toBe('');
+  });
+
+  it('returns empty string for two empty strings', () => {
+    expect(generatePatch('', '')).toBe('');
+  });
+
+  it('includes --- and +++ headers', () => {
+    const patch = generatePatch(A, B);
+    expect(patch).toMatch(/^--- a\//m);
+    expect(patch).toMatch(/^\+\+\+ b\//m);
+  });
+
+  it('includes @@ hunk header', () => {
+    const patch = generatePatch(A, B);
+    expect(patch).toMatch(/^@@ /m);
+  });
+
+  it('marks changed lines correctly', () => {
+    const patch = generatePatch(A, B);
+    expect(patch).toContain('-  size: "md"');
+    expect(patch).toContain('+  size: "lg"');
+    expect(patch).toContain('-  borderRadius: 8px');
+    expect(patch).toContain('+  borderRadius: 12px');
+  });
+
+  it('preserves unchanged lines as context', () => {
+    const patch = generatePatch(A, B);
+    expect(patch).toContain('   variant: "primary"');
+  });
+
+  it('uses custom filename in headers', () => {
+    const patch = generatePatch(A, B, { filename: 'Button.tsx' });
+    expect(patch).toContain('--- a/Button.tsx');
+    expect(patch).toContain('+++ b/Button.tsx');
+  });
+
+  it('handles all-insert (empty before)', () => {
+    const patch = generatePatch('', 'line1\nline2\n');
+    expect(patch).toContain('+line1');
+    expect(patch).toContain('+line2');
+  });
+
+  it('handles all-delete (empty after)', () => {
+    const patch = generatePatch('line1\nline2\n', '');
+    expect(patch).toContain('-line1');
+    expect(patch).toContain('-line2');
+  });
+
+  it('produces multiple hunks when changes are far apart', () => {
+    const before = Array.from({ length: 20 }, (_, i) => `line${i}`).join('\n') + '\n';
+    const after = before
+      .replace('line0', 'CHANGED0')
+      .replace('line19', 'CHANGED19');
+    const patch = generatePatch(before, after);
+    const hunkCount = (patch.match(/^@@/gm) ?? []).length;
+    expect(hunkCount).toBe(2);
+  });
+
+  it('merges nearby hunks into one', () => {
+    const before = Array.from({ length: 10 }, (_, i) => `line${i}`).join('\n') + '\n';
+    const after = before.replace('line0', 'X').replace('line1', 'Y');
+    const patch = generatePatch(before, after);
+    const hunkCount = (patch.match(/^@@/gm) ?? []).length;
+    expect(hunkCount).toBe(1);
+  });
+});