chore: import upstream snapshot with attribution

packages/js-sdk/tests/sandbox/git/add.test.ts

@@ -0,0 +1,24 @@
+import { expect } from 'vitest'
+
+import { sandboxTest } from '../../setup.js'
+import { cleanupBaseDir, createBaseDir, createRepo } from './helpers.js'
+
+sandboxTest('git add stages files', async ({ sandbox }) => {
+  const baseDir = await createBaseDir(sandbox)
+
+  try {
+    const repoPath = await createRepo(sandbox, baseDir)
+    await sandbox.files.write(`${repoPath}/README.md`, 'hello\n')
+
+    await sandbox.git.add(repoPath)
+
+    const status = await sandbox.git.status(repoPath)
+    const entry = status.fileStatus.find(
+      (file: any) => file.name === 'README.md'
+    )
+    expect(entry?.status).toBe('added')
+    expect(entry?.staged).toBe(true)
+  } finally {
+    await cleanupBaseDir(sandbox, baseDir)
+  }
+})