Update TUTORIAL and test_tutorial

Improve the coding style in TUTORIAL in the case
where absolute path to a file is needed to perform file system
access and at the same time is rejected by Targets methods.

Signed-off-by: Teodora Sechkova <[email protected]>

Author: sechkova

docs/TUTORIAL.md

@@ -371,10 +371,11 @@ the target filepaths to metadata.
 # the target's filepath, hash, and length.
 # Note: target path passed to add_target() method has to be relative
 # to the targets directory or an exception is raised.
->>> target4_filepath = os.path.abspath("repository/targets/myproject/file4.txt")
->>> octal_file_permissions = oct(os.stat(target4_filepath).st_mode)[4:]
+>>> target4_filepath = 'myproject/file4.txt'
+>>> target4_abspath = os.path.abspath(os.path.join('repository', 'targets', target4_filepath))
+>>> octal_file_permissions = oct(os.stat(target4_abspath).st_mode)[4:]
 >>> custom_file_permissions = {'file_permissions': octal_file_permissions}
->>> repository.targets.add_target('myproject/file4.txt', custom_file_permissions)
+>>> repository.targets.add_target(target4_filepath, custom_file_permissions)
 ```
 
 The private keys of roles affected by the changes above must now be imported and

tests/test_tutorial.py

@@ -224,27 +224,26 @@ def test_tutorial(self):
 
     repository = load_repository('repository')
 
-    # List of targets is hardcoded since get_filepaths_in_directory()
-    # returns absolute paths and add_targets() raises an exception.
+    # TODO: replace the hard-coded list of targets with a helper
+    # method that returns a list of normalized relative target paths
     list_of_targets = ['file1.txt', 'file2.txt', 'file3.txt']
 
-
     repository.targets.add_targets(list_of_targets)
 
     self.assertTrue('file1.txt' in repository.targets.target_files)
     self.assertTrue('file2.txt' in repository.targets.target_files)
     self.assertTrue('file3.txt' in repository.targets.target_files)
 
-
-    target4_filepath = os.path.abspath(os.path.join(
-        'repository', 'targets', 'myproject', 'file4.txt'))
-    octal_file_permissions = oct(os.stat(target4_filepath).st_mode)[4:]
+    target4_filepath = 'myproject/file4.txt'
+    target4_abspath = os.path.abspath(os.path.join(
+        'repository', 'targets', target4_filepath))
+    octal_file_permissions = oct(os.stat(target4_abspath).st_mode)[4:]
     custom_file_permissions = {'file_permissions': octal_file_permissions}
-    repository.targets.add_target('myproject/file4.txt', custom_file_permissions)
+    repository.targets.add_target(target4_filepath, custom_file_permissions)
     # Note that target filepaths specified in the repo use '/' even on Windows.
     # (This is important to make metadata platform-independent.)
     self.assertTrue(
-        os.path.join('myproject/file4.txt') in repository.targets.target_files)
+        os.path.join(target4_filepath) in repository.targets.target_files)
 
 
     # Skipping user entry of password