[config_types.Path] Add parent and name properties

Also change some tests to use the new properties for coverage.

Bug: 329113288
Change-Id: Idd429ce68b618223acbf4ea5b3494a1ec4321291
Reviewed-on: https://chromium-review.googlesource.com/c/infra/luci/recipes-py/+/5447093
Auto-Submit: Rob Mohr <mohrr@google.com>
Commit-Queue: Chan Li <chanli@chromium.org>
Reviewed-by: Chan Li <chanli@chromium.org>

recipe_engine/config_types.py

diff --git a/recipe_engine/config_types.py b/recipe_engine/config_types.py
index e0633fc..8f9a110 100644
--- a/recipe_engine/config_types.py
+++ b/recipe_engine/config_types.py
@@ -258,6 +258,16 @@
     object.__setattr__(self, 'base', base)
     object.__setattr__(self, 'pieces', tuple(normalized_pieces))
 
+  @property
+  def parent(self) -> Path:
+    """For 'foo/bar/baz', return 'foo/bar'."""
+    return Path(self.base, *self.pieces[0:-1])
+
+  @property
+  def name(self) -> str:
+    """For 'foo/bar/baz', return 'baz'."""
+    return self.pieces[-1]
+
   def _resolve(self) -> Path:
     """If self.base is a ResolvedBasePath, this will return self.
 

recipe_modules/file/examples/copytree.py

diff --git a/recipe_modules/file/examples/copytree.py b/recipe_modules/file/examples/copytree.py
index d80b945..db4df9e 100644
--- a/recipe_modules/file/examples/copytree.py
+++ b/recipe_modules/file/examples/copytree.py
@@ -28,7 +28,7 @@
   assert paths == [dest2.join('a'), dest2.join('aa')], paths
 
   for pth in paths:
-    assert api.file.read_text('read %s' % pth, pth, api.path.basename(pth))
+    assert api.file.read_text('read %s' % pth, pth, pth.name)
 
   api.file.remove('rm a', dest2.join('a'))
   paths = api.file.glob_paths('glob *a', dest2, '*a', test_data=['aa'])
@@ -44,4 +44,3 @@
 
 def GenTests(api):
   yield api.test('basic')
-

recipe_modules/path/examples/full.py

diff --git a/recipe_modules/path/examples/full.py b/recipe_modules/path/examples/full.py
index c3d5179..4db52c3 100644
--- a/recipe_modules/path/examples/full.py
+++ b/recipe_modules/path/examples/full.py
@@ -74,7 +74,9 @@
     assert api.path.pathsep == ':'
 
   assert api.path.basename(file_path) == 'new_file'
+  assert file_path.name == 'new_file'
   assert api.path.dirname(file_path) == api.path.tmp_base_dir
+  assert file_path.parent == api.path.tmp_base_dir
   assert api.path.split(file_path) == (api.path.tmp_base_dir, 'new_file')
 
   thing_bat = api.path.tmp_base_dir.join('thing.bat')