bears: Add CSSCombBear

CSSCombBear is a coding stye formatter for CSS.
It is based on .csscomb.json file written by the user.

Closes coala#634

bears/css/CSSCombBear.py

@@ -0,0 +1,85 @@
+from coalib.bearlib.abstractions.Linter import linter
+from coalib.bears.requirements.NpmRequirement import NpmRequirement
+import json
+
+
+@linter(executable='csscomb',
+        output_format='corrected',
+        use_stdout=True,
+        use_stdin=False,
+        result_message='Change coding style based on CSS rules written in ' +
+                       '.csscomb.json',
+        )
+class CSSCombBear:
+    """
+    CSScomb is a coding style formatter for CSS.
+
+    For more information, consult <https://github.com/csscomb/csscomb.js>.
+    """
+
+    LANGUAGES = {"CSS"}
+    REQUIREMENTS = {NpmRequirement('csscomb')}
+    AUTHORS = {'The coala developers'}
+    AUTHORS_EMAILS = {'coala-devel@googlegroups.com'}
+    LICENSE = 'AGPL-3.0'
+    ASCIINEMA_URL = 'https://asciinema.org/a/bxpke7nizyxdf6mlx6ss4h405'
+    CAN_FIX = {'Formatting'}
+
+    @staticmethod
+    def create_arguments(filename, file, config_file, csscomb_json: str = ""):
+        args = (filename,)
+        if csscomb_json:
+            args += (csscomb_json,)
+        else:
+            args += (config_file,)
+        return args
+
+    def generate_config(filename, file,
+                        verbose: bool = True,
+                        remove_empty_rulesets: bool = True,
+                        always_semicolon: bool = True,
+                        color_case: str = "upper",
+                        block_indent: str = "\\t",
+                        color_shorthand: bool = False,
+                        eof_newline: bool = True,
+                        leading_zero: bool = False,
+                        quotes: str = "single",
+                        sort_order_fallback: str = "abc",
+                        space_before_colon: str = " ",
+                        space_after_colon: str = " ",
+                        space_between_declar: str = "\\n",
+                        space_before_o_brace: str = "\\n",
+                        space_after_o_brace: str = "\\n",
+                        space_after_s_delim: str = "\\n",
+                        space_before_s_delim: str = " ",
+                        space_before_c_brace: str = "\\n",
+                        strip_spaces: bool = True,
+                        tab_size: bool = True,
+                        vendor_prefix_align: bool = True,
+                        csscomb_json: str = ""):
+
+        if not csscomb_json:
+            options = {"verbose": verbose,
+                       "remove-empty-rulesets": remove_empty_rulesets,
+                       "always-semicolon": always_semicolon,
+                       "color-case": color_case,
+                       "block-indent": block_indent,
+                       "eof-newline": eof_newline,
+                       "leading-zero": leading_zero,
+                       "quotes": quotes,
+                       "sort-order-fallback": sort_order_fallback,
+                       "space-before-colon": space_before_colon,
+                       "space-after-colon": space_after_colon,
+                       "space-between-declarations": space_between_declar,
+                       "space-before-opening-brace": space_before_o_brace,
+                       "space-after-opening-brace": space_after_o_brace,
+                       "space-after-selector-delimiter": space_after_s_delim,
+                       "space-before-selector-delimiter": space_before_s_delim,
+                       "space-before-closing-brace": space_before_c_brace,
+                       "strip-spaces": strip_spaces,
+                       "vendor-prefix-align": vendor_prefix_align
+                       }
+
+            return json.dumps(options)
+        else:
+            return None

tests/css/CSSCombBearTest.py

@@ -0,0 +1,125 @@
+from bears.css.CSSCombBear import CSSCombBear
+from tests.LocalBearTestHelper import verify_local_bear
+import os
+
+test_file1 = """
+example {
+    color: red;
+}
+"""
+
+test_file2 = """
+example{color: red}
+"""
+
+test_file3 = """
+example {
+color: red;
+margin-bottom: 100px;
+margin-right: 150px;
+margin-left: 80px;
+background-color: lightblue}
+"""
+
+test_file4 = """
+example{
+color: red;
+margin-bottom: 100px;
+margin-right: 150px;
+margin-left: 80px}
+"""
+
+test_file5 = """
+example{
+    color: red;
+    margin-bottom: 100px;
+    margin-right: 150px;
+}
+"""
+
+test_file_always_semicolon = """
+example{
+    color:red
+}
+"""
+
+test_file_space_after = """
+example {
+    margin-botttom: 100px;
+}
+"""
+
+csscombconfig = os.path.join(os.path.dirname(__file__),
+                             "test_files",
+                             "csscomb.json")
+
+settings = {
+    "always-semicolon": "True",
+    "color-case": "upper",
+    "eof-newline": "True",
+    "leading-zero": "False",
+    "sort-order-fallback": "abc",
+    "space-before-colon": " ",
+    "space-after-colon": " ",
+    "strip-spaces": "True"}
+
+CSSCombBearTest = verify_local_bear(CSSCombBear,
+                                    valid_files=(test_file1,),
+                                    invalid_files=(test_file2,
+                                                   test_file3, test_file4))
+
+
+CSSCombBearConfigFileTest = verify_local_bear(
+    CSSCombBear,
+    valid_files=(test_file5,),
+    invalid_files=(test_file2, test_file3),
+    settings={"csscomb_json": csscombconfig})
+
+
+CSSCombBearConfigFileTest2 = verify_local_bear(
+    CSSCombBear,
+    valid_files=(test_file1,),
+    invalid_files=(test_file2, test_file3, test_file4),
+    settings={"csscomb_json": csscombconfig})
+
+
+CSSCombBearConfigFileTest2 = verify_local_bear(
+    CSSCombBear,
+    valid_files=(test_file1,),
+    invalid_files=(test_file2, test_file3, test_file4),
+    settings={"csscomb_json": csscombconfig})
+
+
+CSSCombBearCoafileTest = verify_local_bear(
+    CSSCombBear,
+    invalid_files=(),
+    valid_files=(test_file5,),
+    settings=settings)
+
+
+CSSCombBearCoafileTest2 = verify_local_bear(
+    CSSCombBear,
+    invalid_files=(test_file2, test_file3, test_file4),
+    valid_files=(test_file1,),
+    settings=settings)
+
+
+CSSCombBearSemicolonTest = verify_local_bear(
+    CSSCombBear,
+    invalid_files = (test_file_always_semicolon,),
+    valid_files = (test_file1,),
+    settings = {"always-semicolon": "True"})
+
+
+CSSCombBearSpaceBefore = verify_local_bear(
+    CSSCombBear,
+    invalid_files = (test_file4, test_file2),
+    valid_files = (test_file1,),
+    settings = {"space-before-colon": " "})
+
+
+CSSCombBearSpaceAfter = verify_local_bear(
+    CSSCombBear,
+    invalid_files = (test_file2, test_file4),
+    valid_files = (test_file_space_after),
+    settings = {"space-after-colon": " "})