add ignore dict constructor func

CHANGELOG.md

@@ -23,6 +23,7 @@ NOTE: please use them in this order.
 
 - Non-existing paths are filtered out before checking and are logged as warning ([#10](https://github.com/rstcheck/rstcheck-core/pull/10))
 - Use `<stdin>` for source in error messages instead of `-` ([#11](https://github.com/rstcheck/rstcheck-core/pull/11))
+- Add constructor function for `IgnoreDict` ([#12](https://github.com/rstcheck/rstcheck-core/pull/12))
 
 ## v1.0.0rc1 (2022-05-28)
 

src/rstcheck_core/checker.py

@@ -138,12 +138,12 @@ def _create_ignore_dict_from_config(rstcheck_config: config.RstcheckConfig) -> t
     :param rstcheck_config: Config to extract ignore settings from
     :return: :py:class:`rstcheck_core.types.IgnoreDict`
     """
-    return types.IgnoreDict(
+    return types.construct_ignore_dict(
         messages=rstcheck_config.ignore_messages,
-        languages=rstcheck_config.ignore_languages or [],
-        directives=rstcheck_config.ignore_directives or [],
-        roles=rstcheck_config.ignore_roles or [],
-        substitutions=rstcheck_config.ignore_substitutions or [],
+        languages=rstcheck_config.ignore_languages,
+        directives=rstcheck_config.ignore_directives,
+        roles=rstcheck_config.ignore_roles,
+        substitutions=rstcheck_config.ignore_substitutions,
     )
 
 
@@ -170,9 +170,7 @@ def check_source(
     if isinstance(source_origin, pathlib.Path) and source_origin.name == "-":
         source_origin = "<stdin>"
     logger.info(f"Check source from '{source_origin}'")
-    ignores = ignores or types.IgnoreDict(
-        messages=None, languages=[], directives=[], roles=[], substitutions=[]
-    )
+    ignores = ignores or types.construct_ignore_dict()
     ignores["directives"].extend(
         inline_config.find_ignored_directives(source, source_origin, warn_unknown_settings)
     )
@@ -350,9 +348,7 @@ def __init__(  # pylint: disable=too-many-arguments
         self.checkers: t.List[types.CheckerRunFunction] = []
         self.source = source
         self.source_origin = source_origin
-        self.ignores = ignores or types.IgnoreDict(
-            messages=None, languages=[], directives=[], roles=[], substitutions=[]
-        )
+        self.ignores = ignores or types.construct_ignore_dict()
         self.report_level = report_level
         self.warn_unknown_settings = warn_unknown_settings
         self.code_block_checker = CodeBlockChecker(

src/rstcheck_core/types.py

@@ -32,6 +32,35 @@ class IgnoreDict(_t.TypedDict):
     substitutions: t.List[str]
 
 
+def construct_ignore_dict(
+    # NOTE: Pattern type-arg errors pydanic: https://github.com/samuelcolvin/pydantic/issues/2636
+    messages: t.Optional[t.Pattern] = None,  # type: ignore[type-arg]
+    languages: t.Optional[t.List[str]] = None,
+    directives: t.Optional[t.List[str]] = None,
+    roles: t.Optional[t.List[str]] = None,
+    substitutions: t.Optional[t.List[str]] = None,
+) -> IgnoreDict:
+    """Create an :py:class:`IgnoreDict` with passed values or defaults.
+
+    :param messages: Value for :py:attr:`IgnoreDict.messages`;
+        :py:obj:`None` results in an empty list; defaults to :py:obj:`None`
+    :param directives: Value for :py:attr:`IgnoreDict.directives`;
+        :py:obj:`None` results in an empty list; defaults to :py:obj:`None`
+    :param roles: Value for :py:attr:`IgnoreDict.roles`;
+        :py:obj:`None` results in an empty list; defaults to :py:obj:`None`
+    :param substitutions: Value for :py:attr:`IgnoreDict.substitutions`;
+        :py:obj:`None` results in an empty list; defaults to :py:obj:`None`
+    :return: :py:class:`IgnoreDict` with passed values or defaults
+    """
+    return IgnoreDict(
+        messages=messages,
+        languages=languages if languages is not None else [],
+        directives=directives if directives is not None else [],
+        roles=roles if roles is not None else [],
+        substitutions=substitutions if substitutions is not None else [],
+    )
+
+
 CheckerRunFunction = t.Callable[..., YieldedLintError]
 """Function to run checks.
 

tests/test_checker.py

@@ -137,7 +137,7 @@ def test__create_ignore_dict_from_config() -> None:
         test_config,
     )
 
-    assert result == types.IgnoreDict(
+    assert result == types.construct_ignore_dict(
         messages=ignore_messages_re,
         languages=ignore_languages,
         directives=ignore_directives,
@@ -202,12 +202,8 @@ def test_lint_error_skipped_on_set_ignore() -> None:
 Test
 ===
 """
-        ignores = types.IgnoreDict(
-            messages=re.compile(r"Possible title underline, too short for the title"),
-            languages=[],
-            directives=[],
-            roles=[],
-            substitutions=[],
+        ignores = types.construct_ignore_dict(
+            messages=re.compile(r"Possible title underline, too short for the title")
         )
 
         result = list(checker.check_source(source, ignores=ignores))
@@ -281,13 +277,7 @@ def test_code_block_no_error_on_set_ignore_pre310() -> None:
 
     print(
 """
-        ignores = types.IgnoreDict(
-            messages=re.compile(r"unexpected EOF while parsing"),
-            languages=[],
-            directives=[],
-            roles=[],
-            substitutions=[],
-        )
+        ignores = types.construct_ignore_dict(messages=re.compile(r"unexpected EOF while parsing"))
 
         result = list(checker.check_source(source, ignores=ignores))
 
@@ -302,13 +292,7 @@ def test_code_block_no_error_on_set_ignore() -> None:
 
     print(
 """
-        ignores = types.IgnoreDict(
-            messages=re.compile(r"'\(' was never closed"),
-            languages=[],
-            directives=[],
-            roles=[],
-            substitutions=[],
-        )
+        ignores = types.construct_ignore_dict(messages=re.compile(r"'\(' was never closed"))
 
         result = list(checker.check_source(source, ignores=ignores))
 
@@ -322,13 +306,7 @@ def test_stdin_message() -> None:
 
     print(
 """
-        ignores = types.IgnoreDict(
-            messages=None,
-            languages=[],
-            directives=[],
-            roles=[],
-            substitutions=[],
-        )
+        ignores = types.construct_ignore_dict()
 
         result = list(checker.check_source(source, source_file=pathlib.Path("-"), ignores=ignores))
 

tests/test_types.py

@@ -0,0 +1,40 @@
+"""Tests for ``types`` module."""
+import re
+
+from rstcheck_core import types
+
+
+class TestIgnoreDictConstructor:
+    """Test ``construct_ignore_dict`` function."""
+
+    @staticmethod
+    def test_no_args() -> None:
+        """Test construction of IgnoreDict with default values."""
+        result = types.construct_ignore_dict()
+
+        assert result == types.IgnoreDict(
+            messages=None,
+            languages=[],
+            directives=[],
+            roles=[],
+            substitutions=[],
+        )
+
+    @staticmethod
+    def test_all_args() -> None:
+        """Test construction of IgnoreDict with set values."""
+        result = types.construct_ignore_dict(
+            messages=re.compile("msg"),
+            languages=["lang"],
+            directives=["dir"],
+            roles=["role"],
+            substitutions=["sub"],
+        )
+
+        assert result == types.IgnoreDict(
+            messages=re.compile("msg"),
+            languages=["lang"],
+            directives=["dir"],
+            roles=["role"],
+            substitutions=["sub"],
+        )