From d1297f8dbf588351e55f117ba853d399d58e5c12 Mon Sep 17 00:00:00 2001
From: Anjali Ratnam <anjaliratnam@microsoft.com>
Date: Mon, 8 Jun 2026 14:00:32 -0700
Subject: [PATCH] fixed ls() bug of files with the same prefix

---
 CHANGELOG.md             |  2 +-
 adlfs/spec.py            | 17 ++++++++++-------
 adlfs/tests/test_spec.py | 17 +++++++++++++++++
 3 files changed, 28 insertions(+), 8 deletions(-)

diff --git a/CHANGELOG.md b/CHANGELOG.md
index b0ced3c7..e889912c 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,7 +2,7 @@
 
 Unreleased
 ----------
-- .
+- Fixed `ls()` returning incorrect results when a file shares the same prefix as other files in the same directory (#409)
 
 2026.5.0
 --------
diff --git a/adlfs/spec.py b/adlfs/spec.py
index 31a26121..bcc42a3e 100644
--- a/adlfs/spec.py
+++ b/adlfs/spec.py
@@ -946,13 +946,16 @@ async def _details(
                 data["name"] = data["name"].rstrip("/")
             output.append(data)
         if target_path:
-            if (
-                len(output) == 1
-                and output[0]["type"] == "file"
-                and not self.version_aware
-            ):
-                # This handles the case where path is a file passed to ls
-                return output
+            if not self.version_aware:
+                # This handles the case where a file path is passed to ls and there are
+                # multiple files with the same prefix.
+                file = [
+                    o
+                    for o in output
+                    if o["name"] == target_path and o["type"] == "file"
+                ]
+                if file:
+                    return file
             output = await filter_blobs(
                 output,
                 target_path,
diff --git a/adlfs/tests/test_spec.py b/adlfs/tests/test_spec.py
index d2a63dee..7d4ab3e2 100644
--- a/adlfs/tests/test_spec.py
+++ b/adlfs/tests/test_spec.py
@@ -2610,3 +2610,20 @@ def test_etag_normalized_form(storage):
 )
 def test_striping_etag(input_etag, expected_etag):
     assert _normalize_etag_quotes(input_etag) == expected_etag
+
+
+def test_ls_files_with_same_prefix(storage):
+    fs = AzureBlobFileSystem(
+        account_name=storage.account_name,
+        connection_string=CONN_STR,
+    )
+    path1 = "data/test/file.txt"
+    path2 = "data/test/file.txt.1"
+    fs.touch(path1)
+    fs.touch(path2)
+
+    assert fs.ls("data/test/") == [path1, path2]
+    assert fs.ls("data/test/file.txt") == [path1]
+    assert fs.ls("data/test/file.txt.1") == [path2]
+
+    fs.rm("data/test", recursive=True)