Adding tests for parsing one line functions/ Fixing parser bug. (#499)

* Added tests for parsing "One line functions"
The tests look valid but don't pass.

from debugging looks like the parser cant find the decorator, although it has no problem finding the function and accepting it as valid.

* Fix parser.py to work on one line functions.

* PEP8 fixes.

* Adding a test for multiple decorators over a "single line function".

* Added tests for single line function with decorator.
1. oneliner_with_decorator_expecting_errors(): The decorator is not ignored, expecting the D400, D415 errors.
2. valid_oneliner_with_decorator(): A valid one line function that shouldn't produce any errors.

* Added tests for single line function with decorator.
1. oneliner_with_decorator_expecting_errors(): The decorator is not ignored, expecting the D400, D415 errors.
2. valid_oneliner_with_decorator(): A valid one line function that shouldn't produce any errors.

Co-authored-by: Sambhav Kothari <sambhavs.email@gmail.com>

src/pydocstyle/parser.py

@@ -683,7 +683,9 @@ def parse_definition(self, class_):
         else:  # one-liner definition
             skipped_error_codes = ''
             docstring = self.parse_docstring()
-            decorators = []  # TODO
+            decorators = self._accumulated_decorators
+            self.log.debug("current accumulated decorators: %s", decorators)
+            self._accumulated_decorators = []
             children = []
             end = self.line
             self.leapfrog(tk.NEWLINE)

src/tests/parser_test.py

@@ -880,6 +880,19 @@ def test():
         def test():
             pass
     """),
+    CodeSnippet("""\
+        '''Test this'''
+
+        @property
+        def test(): pass
+    """),
+    CodeSnippet("""\
+    '''Test this'''
+
+    @first_decorator
+    @property
+    def test(): pass
+   """),
 ))
 def test_parsing_function_decorators(code):
     """Test to ensure we are correctly parsing function decorators."""

src/tests/test_cases/test.py

@@ -337,6 +337,33 @@ def oneliner_d102(): return
 def oneliner_withdoc(): """One liner"""
 
 
+def ignored_decorator(func):   # noqa: D400,D401,D415
+    """Runs something"""
+    func()
+    pass
+
+
+def decorator_for_test(func):   # noqa: D400,D401,D415
+    """Runs something"""
+    func()
+    pass
+
+
+@ignored_decorator
+def oneliner_ignored_decorator(): """One liner"""
+
+
+@decorator_for_test
+@expect("D400: First line should end with a period (not 'r')")
+@expect("D415: First line should end with a period, question mark,"
+        " or exclamation point (not 'r')")
+def oneliner_with_decorator_expecting_errors(): """One liner"""
+
+
+@decorator_for_test
+def valid_oneliner_with_decorator(): """One liner."""
+
+
 @expect("D207: Docstring is under-indented")
 @expect('D213: Multi-line docstring summary should start at the second line')
 def docstring_start_in_same_line(): """First Line.

src/tests/test_definitions.py

@@ -37,7 +37,8 @@ def test_complex_file(test_case):
                                   test_case + '.py')
     results = list(check([test_case_file],
                          select=set(ErrorRegistry.get_error_codes()),
-                         ignore_decorators=re.compile('wraps')))
+                         ignore_decorators=re.compile(
+                             'wraps|ignored_decorator')))
     for error in results:
         assert isinstance(error, Error)
     results = {(e.definition.name, e.message) for e in results}