RuboCopBear: Fix CI breakage for version > 0.47.1

rubocop/rubocop#4226 indicates that `--stdin`
takes filename as an argument which was incorporated. A part of the
fixing was to improve the tests that involved the bear to be run on
files with the `.rb`(ruby) extension because initially the bear was
run on the generated temporary files that was the cause of error.

Fixes coala#1548

Gemfile

@@ -4,7 +4,7 @@ ruby '2.2.2'
 gem "csvlint"
 gem "puppet-lint", "2.1.1"
 gem "reek"
-gem "rubocop", "0.47.1"
+gem "rubocop", "0.49.1"
 gem "scss_lint", require: false
 gem "sqlint"
 gem "travis", "1.8.8"

bears/ruby/RuboCopBear.py

@@ -19,7 +19,7 @@ class RuboCopBear:
     """
 
     LANGUAGES = {'Ruby'}
-    REQUIREMENTS = {GemRequirement('rubocop', '0.47.1'),
+    REQUIREMENTS = {GemRequirement('rubocop', '0.49.1'),
                     PipRequirement('pyyaml', '3.12')}
     AUTHORS = {'The coala developers'}
     AUTHORS_EMAILS = {'[email protected]'}
@@ -36,7 +36,7 @@ class RuboCopBear:
     def create_arguments(filename, file, config_file, rubocop_config: str=''):
         # Need both stdin and filename. Explained in this comment:
         # https://github.com/bbatsov/rubocop/pull/2146#issuecomment-131403694
-        args = (filename, '--stdin', '--format=json')
+        args = ('--stdin', filename, '--format=json')
         if rubocop_config:
             args += ('--config', rubocop_config)
         else:

tests/ruby/RuboCopBearTest.py

@@ -1,57 +1,111 @@
 import os
+from queue import Queue
+
+from coalib.results.Result import Result
+from coalib.results.RESULT_SEVERITY import RESULT_SEVERITY
+from coalib.settings.Section import Section
+from coalib.testing.BearTestHelper import generate_skip_decorator
+from coalib.testing.LocalBearTestHelper import LocalBearTestHelper
 
 from bears.ruby.RuboCopBear import RuboCopBear
-from coalib.testing.LocalBearTestHelper import verify_local_bear
 
-good_file = """def good_name
-  test if something
-end
-"""
 
-bad_file = """def badName
-  test if something
-end
-"""
+def get_testfile_path(name):
+    return os.path.join(os.path.dirname(__file__),
+                        'test_files',
+                        name)
+
+
+def load_testfile(name):
+    with open(get_testfile_path(name)) as f:
+        return f.readlines()
+
 
+@generate_skip_decorator(RuboCopBear)
+class RuboCopBearTest(LocalBearTestHelper):
 
-RuboCopBearTest = verify_local_bear(RuboCopBear,
-                                    invalid_files=(bad_file,),
-                                    valid_files=(good_file,))
+    def setUp(self):
+        self.uut = RuboCopBear(Section('name'), Queue())
 
-# Testing Config
-rubocop_config = os.path.join(os.path.dirname(__file__),
-                              'test_files',
-                              'rubocop_config.yaml')
+    def test_good_file(self):
+        filename = 'good_file.rb'
+        file_contents = load_testfile(filename)
+        self.check_results(
+            self.uut,
+            file_contents,
+            [],
+            filename=get_testfile_path(filename))
+
+    def test_bad_file(self):
+        filename = 'bad_file.rb'
+        file_contents = load_testfile(filename)
+        self.check_results(
+            self.uut,
+            file_contents,
+            [Result.from_values('RuboCopBear (Style/MethodName)',
+                                message='Use snake_case for method names.',
+                                file=get_testfile_path(filename),
+                                line=1,
+                                column=5,
+                                end_line=1,
+                                end_column=12,
+                                severity=RESULT_SEVERITY.INFO)],
+            filename=get_testfile_path(filename))
 
 
 # bad file becomes good and vice-versa
-RuboCopBearConfigFileTest = verify_local_bear(
-                                RuboCopBear,
-                                valid_files=(bad_file,),
-                                invalid_files=(good_file,),
-                                settings={'rubocop_config': rubocop_config})
-
-# Testing settings
-another_good_file = """
-def goodindent
- # 1 space indent
-end
-"""
-
-another_bad_file = """
-def badindent
-  # 2 spaces indent
-end
-"""
-
-RuboCopBearSettingsTest = verify_local_bear(
-                              RuboCopBear,
-                              valid_files=(another_good_file,),
-                              invalid_files=(another_bad_file,),
-                              settings={'indent_size': 1})
-
-RuboCopBearSettingsTest = verify_local_bear(
-                              RuboCopBear,
-                              valid_files=(bad_file,),
-                              invalid_files=(good_file,),
-                              settings={'method_name_case': 'camel'})
+    def test_bad_config_file(self):
+        filename = 'good_file.rb'
+        file_contents = load_testfile(filename)
+        self.check_results(
+            self.uut,
+            file_contents,
+            [Result.from_values('RuboCopBear (Style/MethodName)',
+                                message='Use camelCase for method names.',
+                                file=get_testfile_path(filename),
+                                line=1,
+                                column=5,
+                                end_line=1,
+                                end_column=14,
+                                severity=RESULT_SEVERITY.INFO)],
+            filename=get_testfile_path(filename),
+            settings={'rubocop_config': get_testfile_path(
+                'rubocop_config.yaml')})
+
+    def test_good_config_file(self):
+        filename = 'bad_file.rb'
+        file_contents = load_testfile(filename)
+        self.check_results(
+            self.uut,
+            file_contents,
+            [],
+            filename=get_testfile_path(filename),
+            settings={'rubocop_config': get_testfile_path(
+                'rubocop_config.yaml')})
+
+    def test_bad_indent_size(self):
+        filename = 'indent_file.rb'
+        file_contents = load_testfile(filename)
+        self.check_results(
+            self.uut,
+            file_contents,
+            [Result.from_values('RuboCopBear (Layout/CommentIndentation)',
+                                message='Incorrect indentation detected '
+                                        '(column 2 instead of 1).',
+                                file=get_testfile_path(filename),
+                                line=2,
+                                column=3,
+                                end_line=2,
+                                end_column=20,
+                                severity=RESULT_SEVERITY.INFO)],
+            filename=get_testfile_path(filename),
+            settings={'indent_size': 1})
+
+    def test_good_indent_size(self):
+        filename = 'indent_file.rb'
+        file_contents = load_testfile(filename)
+        self.check_results(
+            self.uut,
+            file_contents,
+            [],
+            filename=get_testfile_path(filename))

tests/ruby/test_files/bad_file.rb

@@ -0,0 +1,3 @@
+def badName
+  test if something
+end

tests/ruby/test_files/good_file.rb

@@ -0,0 +1,3 @@
+def good_name
+  test if something
+end

tests/ruby/test_files/indent_file.rb

@@ -0,0 +1,3 @@
+def badindent
+  # 2 spaces indent
+end