improvements

test/fs.test.ts

@@ -3,7 +3,7 @@ import { tmpdir } from 'node:os'
 import { join } from 'node:path'
 import { afterEach, describe, expect, it } from 'vitest'
 import { simpleGit } from 'simple-git'
-import { buildTreeFromPaths, createProjectFile, readAll, readProjectFile, readTree, writeProjectFile } from '../src/main/fs-service'
+import { buildTreeFromPaths, createProjectFile, readAll, readDirChildren, readProjectFile, readTree, writeProjectFile } from '../src/main/fs-service'
 
 let dir = ''
 afterEach(async () => { if (dir) await rm(dir, { recursive: true, force: true }) })
@@ -33,6 +33,51 @@ describe('readTree', () => {
     expect(top.indexOf('src')).toBeLessThan(top.indexOf('README.md'))
     expect(top.indexOf('src')).toBeLessThan(top.indexOf('logo.bin'))
   })
+
+  it('shows an empty folder (no files yet) that rg --files can not emit', async () => {
+    dir = await fixture()
+    await mkdir(join(dir, 'empty'), { recursive: true })
+    await mkdir(join(dir, 'src', 'nested', 'deep'), { recursive: true }) // file-empty nested chain
+    const tree = await readTree(dir)
+    const top = (tree.children || []).map((c) => c.name)
+    expect(top).toContain('empty')
+    const empty = (tree.children || []).find((c) => c.name === 'empty')!
+    expect(empty.type).toBe('dir')
+    // the nested empty chain shows under the (file-bearing) src folder
+    const src = (tree.children || []).find((c) => c.name === 'src')!
+    const nested = (src.children || []).find((c) => c.name === 'nested')!
+    expect(nested.type).toBe('dir')
+    expect((nested.children || []).map((c) => c.name)).toEqual(['deep'])
+  })
+})
+
+describe('readDirChildren', () => {
+  it('returns a single folder\'s children (root and subdir), ignoring node_modules', async () => {
+    dir = await fixture()
+    const top = (await readDirChildren(dir, '')).map((c) => c.name)
+    expect(top).toContain('src')
+    expect(top).toContain('README.md')
+    expect(top).not.toContain('node_modules')
+    const src = await readDirChildren(dir, 'src')
+    expect(src.map((c) => c.name)).toEqual(['a.ts'])
+    expect(src[0].path).toBe('src/a.ts')
+  })
+
+  it('shows an empty subfolder created since the initial tree read', async () => {
+    dir = await fixture()
+    await mkdir(join(dir, 'src', 'fresh'), { recursive: true })
+    const src = await readDirChildren(dir, 'src')
+    const fresh = src.find((c) => c.name === 'fresh')
+    expect(fresh?.type).toBe('dir')
+    expect(fresh?.path).toBe('src/fresh')
+  })
+
+  it('reflects files added/removed since the initial tree read', async () => {
+    dir = await fixture()
+    await writeFile(join(dir, 'src', 'b.ts'), 'export const b = 2\n')
+    await rm(join(dir, 'src', 'a.ts'))
+    expect((await readDirChildren(dir, 'src')).map((c) => c.name)).toEqual(['b.ts'])
+  })
 })
 
 describe('readAll', () => {
@@ -67,6 +112,15 @@ describe('buildTreeFromPaths', () => {
     expect((src.children || []).map((c) => c.name)).toEqual(['util', 'a.ts', 'b.ts'])
     expect((src.children || []).find((c) => c.name === 'util')!.path).toBe('src/util')
   })
+
+  it('forces dirPaths in as empty folders, deduped against file-derived dirs', () => {
+    const t = buildTreeFromPaths('proj', ['src/a.ts'], ['empty', 'src/sub', 'src'])
+    const top = (t.children || []).map((c) => c.name)
+    expect(top).toEqual(['empty', 'src']) // dirs alphabetical, both present once
+    const src = (t.children || []).find((c) => c.name === 'src')!
+    expect((src.children || []).map((c) => c.name)).toEqual(['sub', 'a.ts'])
+    expect((src.children || []).find((c) => c.name === 'sub')!.type).toBe('dir')
+  })
 })
 
 describe('read/write round-trip', () => {