fixes and build 0.1.0

test/group-by-dir.test.ts

@@ -0,0 +1,35 @@
+import { describe, expect, it } from 'vitest'
+import { groupByDir } from '../src/renderer/src/components'
+import type { Change } from '../src/renderer/src/types'
+
+function change(path: string): Change {
+  return { path, status: 'M', add: 1, del: 0, deleted: false, staged: false, id: path }
+}
+
+describe('groupByDir', () => {
+  it('gives one group per folder when git returns the folder in separated runs', () => {
+    const groups = groupByDir([
+      change('tests/Feature/AlphaTest.php'),
+      change('app/Models/User.php'),
+      change('tests/Feature/BetaTest.php'),
+    ])
+    expect(groups.map((g) => g.dir)).toEqual(['tests/Feature', 'app/Models'])
+    expect(groups[0].rows.map((r) => r.path)).toEqual([
+      'tests/Feature/AlphaTest.php',
+      'tests/Feature/BetaTest.php',
+    ])
+  })
+
+  it('keeps every row, so the keyboard cursor walks the full list', () => {
+    const list = ['a/one.ts', 'b/two.ts', 'a/three.ts', 'four.ts'].map(change)
+    const flat = groupByDir(list).flatMap((g) => g.rows)
+    expect(flat).toHaveLength(list.length)
+    expect(new Set(flat.map((r) => r.id)).size).toBe(list.length)
+  })
+
+  it('puts a project-root file in the empty-string group', () => {
+    expect(groupByDir([change('README.md')])).toEqual([
+      { dir: '', rows: [change('README.md')] },
+    ])
+  })
+})