Tested copying files using append = replace, format = raw, source and mirror parameters.

tests/templates/test_template_executor.py

@@ -2981,7 +2981,7 @@ AttributeError: module 'os' has no attribute 'suspicious_attribute'
             assert output['stderr'] == stderr_text
             counter += 1
 
-    def test_using_mirror_for_coping_files(self):
+    def test_using_replace_raw_and_mirror_for_coping_files(self):
         target_path = join_paths(
                               CHROOT_PATH,
                               '/etc/append_replace_file_testfiles/file_1.png')

tests/templates/testfiles/test_dir_processor_root/templates_42/install/template

@@ -1,2 +1,2 @@
-{% calculate append = "join", format = "raw", source = "/etc/img.gif",
+{% calculate format = "raw", source = "/etc/img.gif",
 name = "copy.gif", package = "test-category/test-package" -%}