From 41427331e0715a150cde7b9638fe236756e69117 Mon Sep 17 00:00:00 2001
From: Thomas Newton <thomas.w.newton@gmail.com>
Date: Wed, 1 Nov 2023 20:24:14 +0000
Subject: [PATCH] Test empty directory on HNS account

---
 cpp/src/arrow/filesystem/azurefs_test.cc | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/cpp/src/arrow/filesystem/azurefs_test.cc b/cpp/src/arrow/filesystem/azurefs_test.cc
index 41adf1e163697..60bb6a8c2132d 100644
--- a/cpp/src/arrow/filesystem/azurefs_test.cc
+++ b/cpp/src/arrow/filesystem/azurefs_test.cc
@@ -321,6 +321,10 @@ TEST_F(TestAzureHNSFileSystem, GetFileInfoObjectWithNestedStructure) {
       .GetBlockBlobClient(std::string(kObjectName) + "0")
       .UploadFrom(reinterpret_cast<const uint8_t*>(kLoremIpsum), strlen(kLoremIpsum));
 
+  datalake_service_client_->GetFileSystemClient(PreexistingContainerName())
+      .GetDirectoryClient("test-empty-object-dir")
+      .Create();
+
   AssertFileInfo(fs_.get(), PreexistingContainerPath() + kObjectName, FileType::File);
   AssertFileInfo(fs_.get(), PreexistingContainerPath() + kObjectName + "/",
                  FileType::NotFound);
@@ -338,6 +342,11 @@ TEST_F(TestAzureHNSFileSystem, GetFileInfoObjectWithNestedStructure) {
                  FileType::NotFound);
   AssertFileInfo(fs_.get(), PreexistingContainerPath() + "test-object-dir/some_other_di",
                  FileType::NotFound);
+
+  AssertFileInfo(fs_.get(), PreexistingContainerPath() + "test-empty-object-dir",
+                 FileType::Directory);
+
+  // TODO: Add an assert that it did not use ListBlobs to detect directories.
 }
 
 // TODO: Add ADLS Gen2 directory tests.