AnnotationBear: Allow missing language setting

A missing language setting is not any different from
a language name which has a Language definition that
does not contain the necessary information to correctly
parse the file.

Use a special 'UnknownLanguage' in this scenario.

Also upgrades AnnotationBear from LanguageDefinition
to the new Language.

Fixes #1012
Closes #1095

bears/general/AnnotationBear.py

@@ -1,4 +1,4 @@
-from coalib.bearlib.languages.LanguageDefinition import LanguageDefinition
+from coalib.bearlib.languages.Language import Language
 from coalib.bears.LocalBear import LocalBear
 from coalib.results.HiddenResult import HiddenResult
 from coalib.results.Result import Result, RESULT_SEVERITY
@@ -12,7 +12,8 @@ class AnnotationBear(LocalBear):
     AUTHORS_EMAILS = {'[email protected]'}
     LICENSE = 'AGPL-3.0'
 
-    def run(self, filename, file, language: str, coalang_dir: str = None):
+    def run(self, filename, file, language: str='Unknown',
+            coalang_dir: str=None):
         """
         Finds out all the positions of strings and comments in a file.
         The Bear searches for valid comments and strings and yields their
@@ -31,19 +32,43 @@ def run(self, filename, file, language: str, coalang_dir: str = None):
             ``u"string"``, the ``u`` will not be in the source range).
         """
         try:
-            lang_dict = LanguageDefinition(language, coalang_dir=coalang_dir)
-        except FileNotFoundError:
+            lang = Language[language]
+        except AttributeError:
             content = ('coalang specification for ' + language +
                        ' not found.')
             yield HiddenResult(self, content)
-            return
-
-        string_delimiters = dict(lang_dict['string_delimiters'])
-        multiline_string_delimiters = dict(
-            lang_dict['multiline_string_delimiters'])
-        multiline_comment_delimiters = dict(
-            lang_dict['multiline_comment_delimiters'])
-        comment_delimiter = dict(lang_dict['comment_delimiter'])
+            lang = Language['Unknown']
+
+        lang = lang.get_default_version()
+
+        if 'string_delimiters' in lang.attributes:
+            string_delimiters = lang.string_delimiters
+        else:
+            string_delimiters = {}
+
+        if 'multiline_string_delimiters' in lang.attributes:
+            multiline_string_delimiters = lang.multiline_string_delimiters
+        else:
+            multiline_string_delimiters = {}
+
+        if 'multiline_comment_delimiters' in lang.attributes:
+            multiline_comment_delimiters = lang.multiline_comment_delimiters
+        else:
+            multiline_comment_delimiters = {}
+
+        if 'comment_delimiter' in lang.attributes:
+            if isinstance(lang.comment_delimiter, str):
+                comment_delimiter = {lang.comment_delimiter: ''}
+            elif isinstance(lang.comment_delimiter, tuple):
+                comment_delimiter = {item: ''
+                                     for item in lang.comment_delimiter}
+            else:
+                raise TypeError('%s.comment_delimiter of unknown type %s'
+                                % (lang.__class__.__qualname__,
+                                   lang.comment_delimiter.__class__.__name__))
+        else:
+            comment_delimiter = {}
+
         string_ranges = comment_ranges = ()
         try:
             string_ranges, comment_ranges = self.find_annotation_ranges(

requirements.txt

@@ -1,5 +1,5 @@
 # Use >= for development versions so that source builds always work
-coala>=0.9
+coala>=0.9.dev20161221104802
 munkres3~=1.0
 pylint~=1.6
 autopep8~=1.2

tests/general/IndentationBearTest.py

@@ -21,25 +21,53 @@ class TestLanguage:
     encapsulators = {'(': ')', '[': ']'}
 
 
-class IndentationBearTest(unittest.TestCase):
+@Language
+class InvalidLanguageSpec:
+    comment_delimiter = {}
+
+
+class IndentationBearTestBase(unittest.TestCase):
 
     def setUp(self):
         self.section = Section('')
-        self.section.append(Setting('language', 'TestLanguage'))
+        self.section.append(Setting('language', self.language))
         self.section.append(Setting('use_spaces', False))
         self.dep_uut = AnnotationBear(self.section, Queue())
 
     def get_results(self, file, section=None):
         if section is None:
             section = self.section
         dep_results_valid = self.dep_uut.execute('file', file)
+        if not dep_results_valid:
+            return
+
         uut = IndentationBear(section, Queue())
         arg_dict = {'dependency_results':
                     {AnnotationBear.__name__:
                      list(dep_results_valid)},
                     'file': file}
         return list(uut.run_bear_from_section(['file'], arg_dict))
 
+
+class InvalidLanguageTest(IndentationBearTestBase):
+
+    language = 'InvalidLanguageSpec'
+
+    def test_wrong_type(self):
+        self.get_results('')
+        mq = self.dep_uut.message_queue
+        last_message = None
+        while not mq.empty():
+            last_message = mq.get(False)
+
+        self.assertIn(self.language, str(last_message))
+        self.assertIn('unknown type dict', str(last_message))
+
+
+class IndentationBearTest(IndentationBearTestBase):
+
+    language = 'TestLanguage'
+
     def verify_bear(self,
                     valid_file=None,
                     invalid_file=None,

tests/general/KeywordBearTest.py

@@ -43,6 +43,17 @@ def test_empty_keyword(self):
                           dependency_results=self.dep_results) as result:
             self.assertEqual(result, [])
 
+    def test_no_language(self):
+        text = ['# todo 123']
+        section = Section('')
+        section.append(Setting('keywords', 'TODO'))
+
+        with execute_bear(KeywordBear(section, Queue()), 'F', text,
+                          dependency_results=self.dep_results) as result:
+            self.assertEqual(result[0].diffs, {})
+            self.assertEqual(result[0].affected_code[0].start.line, 1)
+            self.assertEqual(len(result), 1)
+
     def test_keyword_in_comment(self):
         dep_results = {
             'AnnotationBear': {}