[PATCH v2 5/5] test: add test for full FAT16 directory

[Heinrich Schuchardt]

Add a unit test checking that a full FAT16 directory leads to an error
when trying to add an additional entry.

Signed-off-by: Heinrich Schuchardt <heinrich.schuchardt at canonical.com>
---
v2:
	new patch
---
 test/py/tests/test_fs/test_mkdir.py | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)

diff --git a/test/py/tests/test_fs/test_mkdir.py b/test/py/tests/test_fs/test_mkdir.py
index f5cc308362..e3a9e3ed27 100644
--- a/test/py/tests/test_fs/test_mkdir.py
+++ b/test/py/tests/test_fs/test_mkdir.py
@@ -119,3 +119,20 @@ class TestMkdir(object):
             assert('0123456789abcdef00/'  in output)
             assert('0123456789abcdef13/'  in output)
             assert_fs_integrity(fs_ubtype, fs_img)
+
+    def test_mkdir7(self, u_boot_console, fs_obj_mkdir):
+        """ Test Case 7 - max out number of root directory entries
+        """
+        _, _, fs_type = fs_obj_mkdir
+        if fs_type != 'fat16':
+            return
+        with u_boot_console.log.section('Test Case 7 - mkdir (max out)'):
+            for i in range(0, 512):
+                output = u_boot_console.run_command(
+                    f'fatmkdir host 0:0 /U-Boot-mkdir-max-out-test-directory-{i:05d}')
+                if 'Can\'t create directory entry' in output:
+                    break
+            # A directory was created
+            assert i > 0
+            # The FAT16 root directory has only 512 directory entries
+            assert i <= 512 / 5
-- 
2.36.1