Add test case for file rename after a delay

Add a test case which copies a hex file to a device with the wrong
extension, delays for 10s and then renames the file to the correct
extension.  This simulates downloading a file from a browser.

Author: c1728p9

test/msd_test.py

@@ -76,6 +76,8 @@ def __init__(self, board, parent_test, test_name):
         self._mock_file_list_after = []
         self._mock_dir_list_after = []
         self._programming_file_name = None
+        self._new_name = None
+        self._new_name_delay = None
 
     def set_shutils_copy(self, source_file_name):
         """
@@ -118,6 +120,11 @@ def set_expected_failure_msg(self, msg):
         assert msg is None or type(msg) is str
         self._expected_failure_msg = msg
 
+    def set_rename_after_delay(self, delay, name):
+        """Set delay and name to rename file to"""
+        self._new_name = name
+        self._new_name_delay = delay
+
     def add_mock_files(self, file_list):
         """Add a list of tuples containing a file and contents"""
         self._mock_file_list.extend(file_list)
@@ -202,7 +209,18 @@ def run(self):
             with open(file_path, 'wb') as file_handle:
                 file_handle.write(file_contents)
 
-        self.board.wait_for_remount(test_info)
+        # Delay if set
+        if self._new_name_delay is not None:
+            time.sleep(self._new_name_delay)
+
+        # Wait for remount if the copied file is present
+        if os.path.isfile(programming_file_name):
+            if self._new_name is not None:
+                new_name = self.board.get_file_path(self._new_name)
+                os.rename(programming_file_name, new_name)
+            self.board.wait_for_remount(test_info)
+        else:
+            test_info.failure('Missed device remount')
 
         # Verify the disk is still valid
         self.board.test_fs(test_info)
@@ -336,6 +354,16 @@ def test_mass_storage(workspace, parent_test):
     #        when a binary file is loaded, since there is no way to
     #        tell where the end of the file is.
 
+    # Test writing a file with an unknown extension and then renaming it
+    # This simulates a browser downloading a file
+    # Note - firefox on linux typically creates an empty file and
+    #        after ~8s the contents get flushed to the disk
+    test = MassStorageTester(board, test_info, "Rename after delay")
+    test.set_programming_data(hex_file_contents, 'image.cdownload')
+    test.set_rename_after_delay(10.0, 'image.hex')
+    test.set_expected_data(bin_file_contents)
+    test.run()
+
     # Finally, load a good binary
     test = MassStorageTester(board, test_info, "Load good file to restore state")
     test.set_programming_data(hex_file_contents, 'image.hex')