1 files changed, 51 insertions, 0 deletions
diff --git a/test/py/tests/test_load_sandbox.py b/test/py/tests/test_load_sandbox.py
new file mode 100644
index 00000000000..8d28a630e76
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+++ b/test/py/tests/test_load_sandbox.py
@@ -0,0 +1,51 @@
+# SPDX-License-Identifier:      GPL-2.0+
+# Copyright 2026 Free Mobile - Vincent Jardin
+
+"""Regression test for `load sandbox - <addr> <file>`.
+
+Exercises the null_dev_desc_ok dispatch added in
+"fs: dispatch null_dev_desc_ok filesystems before block lookup".
+
+It is the counterpart of test_load_semihosting.py
+"""
+
+import os
+import pytest
+
+
+[email protected](scope='session')
+def sandbox_fixture(u_boot_config):
+    """Host-staged fixture file read by `load sandbox`."""
+    path = os.path.join(u_boot_config.persistent_data_dir,
+                        'sandbox-fstype.txt')
+    with open(path, 'w', encoding='utf-8') as f:
+        f.write('Das U-Boot\n')   # 11 bytes, same as test_hostfs.py / semihosting
+    yield path
+    os.remove(path)
+
+
+[email protected]('sandbox')
+def test_sandbox_load(ubman, sandbox_fixture):
+    """Run `load sandbox - <addr> <file>` and check the bytes."""
+    response = ubman.run_command(
+        f'load sandbox - $loadaddr {sandbox_fixture}')
+
+    # Fixture is "Das U-Boot\n" (11 bytes).
+    assert '11 bytes read' in response
+
+    # crc32("Das U-Boot\n") -- identical to the semihosting / hostfs checks.
+    response = ubman.run_command('crc32 $loadaddr $filesize')
+    assert '==> 60cfccfc' in response
+
+
+[email protected]('sandbox')
+def test_sandbox_load_offset(ubman, sandbox_fixture):
+    """Run the [bytes] [pos] variant through the same dispatch."""
+    response = ubman.run_command(
+        f'load sandbox - $loadaddr {sandbox_fixture} 4 6')
+    # bytes=4 pos=6 over "Das U-Boot\n" -> "Boot".
+    assert '4 bytes read' in response
+
+    # crc32("Boot")
+    response = ubman.run_command('crc32 $loadaddr $filesize')
+    assert '==> e6df01fa' in response