HappinessLintBear: Throw exception when use_spaces

Throw error if use_space is true as tabbed
identation is to be used.

Closes coala#1754

bears/js/HappinessLintBear.py

@@ -19,6 +19,13 @@ class HappinessLintBear:
     ASCIINEMA_URL = 'https://asciinema.org/a/80714'
     CAN_DETECT = {'Syntax'}
 
-    @staticmethod
-    def create_arguments(filename, file, config_file):
+    @classmethod
+    def create_arguments(cls, filename, file, config_file,
+                         use_spaces: bool=False):
+        if use_spaces:
+            raise ValueError(
+                '"use_spaces=True" is incompatible with {}, '
+                'set it to false.'.format(cls.name)
+            )
+
         return filename,

tests/js/HappinessLintBearTest.py

@@ -1,5 +1,12 @@
+import re
+from queue import Queue
+
 from bears.js.HappinessLintBear import HappinessLintBear
 from coalib.testing.LocalBearTestHelper import verify_local_bear
+from coalib.settings.Section import Section
+from coalib.settings.Setting import Setting
+from coalib.testing.LocalBearTestHelper import LocalBearTestHelper
+from coalib.testing.BearTestHelper import generate_skip_decorator
 
 
 good_file = """
@@ -17,3 +24,18 @@
 HappinessLintBearTest = verify_local_bear(HappinessLintBear,
                                           valid_files=(good_file,),
                                           invalid_files=(bad_file,))
+
+
+@generate_skip_decorator(HappinessLintBear)
+class HappinessLintBearConfigTest(LocalBearTestHelper):
+
+    USE_SPACE_ERR_MSG = re.escape('"use_spaces=True" is incompatible with '
+                                  'HappinessLintBear, set it to false.')
+
+    def test_validate_use_spaces(self):
+        section = Section('name')
+        section.append(Setting('use_spaces', True))
+        bear = HappinessLintBear(section, Queue())
+
+        with self.assertRaisesRegex(ValueError, self.USE_SPACE_ERR_MSG):
+            bear.run(bad_file, use_spaces=True)