Add type checker

.github/workflows/ci.yml

@@ -54,3 +54,19 @@ jobs:
         with:
           version: "~= 23.0"
           src: "./tested ./tests"
+  types:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v3
+      - uses: actions/setup-python@v4
+        with:
+          python-version: 3.11.2
+          cache: 'pipenv'
+      - run: pip install pipenv
+      - run: pipenv install --dev
+      - run: echo "$(pipenv --venv)/bin" >> $GITHUB_PATH
+      - uses: jakebailey/pyright-action@v1
+        with:
+          version: '1.1.316'
+          warnings: true
+          working-directory: tested/

flake.nix

@@ -69,15 +69,17 @@
             typing-inspect
             pyyaml
             pygments
-            python-i18n
-            # For Pycharm
-            setuptools
+            python-i18n 
         ];
         python-env = python.withPackages(ps: (core-packages ps) ++ [
             ps.pylint
             ps.pytest
             ps.pytest-mock
             ps.pytest-cov
+            # For Pycharm
+            ps.setuptools
+            ps.isort
+            ps.black
         ]);
         core-deps = [
             (python.withPackages(ps: (core-packages ps) ++ [ps.pylint]))
@@ -115,7 +117,7 @@
           default = tested;
           tested = pkgs.devshell.mkShell {
             name = "TESTed";
-            packages = [python-env] ++ haskell-deps ++ node-deps ++ bash-deps ++ c-deps ++ java-deps ++ kotlin-deps ++ csharp-deps;
+            packages = [python-env pkgs.nodePackages.pyright] ++ haskell-deps ++ node-deps ++ bash-deps ++ c-deps ++ java-deps ++ kotlin-deps ++ csharp-deps;
             devshell.startup.link.text = ''
               mkdir -p "$PRJ_DATA_DIR/current"
               ln -sfn "${python-env}/${python-env.sitePackages}" "$PRJ_DATA_DIR/current/python-packages"

tested/datatypes/__init__.py

@@ -35,10 +35,10 @@
 
 NumericTypes = Union[BasicNumericTypes, AdvancedNumericTypes]
 StringTypes = Union[BasicStringTypes, AdvancedStringTypes]
-BooleanTypes = Union[BasicBooleanTypes]
+BooleanTypes = BasicBooleanTypes
 NothingTypes = Union[BasicNothingTypes, AdvancedNothingTypes]
 SequenceTypes = Union[BasicSequenceTypes, AdvancedSequenceTypes]
-ObjectTypes = Union[BasicObjectTypes]
+ObjectTypes = BasicObjectTypes
 
 SimpleTypes = Union[NumericTypes, StringTypes, BooleanTypes, NothingTypes]
 ComplexTypes = Union[SequenceTypes, ObjectTypes]
@@ -56,10 +56,10 @@ def resolve_to_basic(type_: AllTypes) -> BasicTypes:
     """
     Resolve a type to its basic type. Basic types are returned unchanged.
     """
-    if isinstance(type_, get_args(BasicTypes)):
+    if isinstance(type_, BasicTypes):
         return type_
 
-    assert isinstance(type_, get_args(AdvancedTypes))
+    assert isinstance(type_, AdvancedTypes)
     return type_.base_type
 
 

tested/description_instance.py

@@ -140,14 +140,14 @@ def create_description_instance_from_template(
     judge_directory = Path(__file__).parent.parent
     global_config = GlobalConfig(
         dodona=DodonaConfig(
-            resources="",
-            source="",
+            resources="",  # type: ignore
+            source="",  # type: ignore
             time_limit=0,
             memory_limit=0,
             natural_language=natural_language,
             programming_language=programming_language,
-            workdir="",
-            judge=str(judge_directory),
+            workdir="",  # type: ignore
+            judge=judge_directory,
             test_suite="suite.yaml",
         ),
         context_separator_secret="",
@@ -185,7 +185,7 @@ def get_variable(var_name: str, is_global: bool = True):
     if is_html:
         namespace = html.escape(namespace)
 
-    return template.render(
+    return template.render(  # type: ignore
         function=partial(description_generator.get_function_name, is_html=is_html),
         property=partial(description_generator.get_property_name, is_html=is_html),
         variable=get_variable,
@@ -224,9 +224,9 @@ def create_description_instance(
     if not language_exists(programming_language):
         raise ValueError(f"Language {programming_language} doesn't exists")
 
-    template = prepare_template(template, is_html)
+    template = prepare_template(template, is_html)  # type: ignore
     return create_description_instance_from_template(
-        template, programming_language, natural_language, namespace, is_html
+        template, programming_language, natural_language, namespace, is_html  # type: ignore
     )
 
 

tested/dodona.py

@@ -12,7 +12,7 @@
 import dataclasses
 import json
 from enum import StrEnum, auto, unique
-from typing import IO, Literal, Optional, Type, Union
+from typing import IO, Literal, Optional, Union
 
 from pydantic import BaseModel
 from pydantic.dataclasses import dataclass
@@ -138,7 +138,7 @@ class AnnotateCode:
 
     row: Index
     text: str
-    externalUrl: str = None
+    externalUrl: Optional[str] = None
     column: Optional[Index] = None
     type: Optional[Severity] = None
     rows: Optional[Index] = None
@@ -227,7 +227,9 @@ class CloseJudgment:
 }
 
 
-def close_for(type_: str) -> Type[Update]:
+def close_for(
+    type_: str,
+) -> type[CloseJudgment | CloseTab | CloseContext | CloseTestcase | CloseTest]:
     return _mapping[type_]
 
 

tested/dsl/ast_translator.py

@@ -22,14 +22,15 @@
 - Collection and datastructure literals
 - Negation operator
 - Function calls
-- Keyword arguments (ie. named arguments)
-- Properties (ie. attributes)
+- Keyword arguments (i.e. named arguments)
+- Properties (i.e. attributes)
 """
 
 import ast
 import dataclasses
-from typing import Optional
+from typing import Literal, Optional, cast, overload
 
+from _decimal import Decimal
 from pydantic import ValidationError
 
 from tested.datatypes import (
@@ -51,6 +52,7 @@
     ObjectKeyValuePair,
     ObjectType,
     SequenceType,
+    SpecialNumbers,
     Statement,
     Value,
     VariableType,
@@ -70,11 +72,9 @@ def _is_and_get_allowed_empty(node: ast.Call) -> Optional[Value]:
     """
     assert isinstance(node.func, ast.Name)
     if node.func.id in AdvancedSequenceTypes.__members__.values():
-        # noinspection PyTypeChecker
-        return SequenceType(type=node.func.id, data=[])
+        return SequenceType(type=cast(AdvancedSequenceTypes, node.func.id), data=[])
     elif node.func.id in BasicSequenceTypes.__members__.values():
-        # noinspection PyTypeChecker
-        return SequenceType(type=node.func.id, data=[])
+        return SequenceType(type=cast(BasicSequenceTypes, node.func.id), data=[])
     elif node.func.id in BasicObjectTypes.__members__.values():
         return ObjectType(type=BasicObjectTypes.MAP, data=[])
     else:
@@ -96,6 +96,7 @@ def _is_type_cast(node: ast.expr) -> bool:
 def _convert_ann_assignment(node: ast.AnnAssign) -> Assignment:
     if not isinstance(node.target, ast.Name):
         raise InvalidDslError("You can only assign to simple variables")
+    assert node.value
     value = _convert_expression(node.value, False)
     if isinstance(node.annotation, ast.Name):
         type_ = node.annotation.id
@@ -109,7 +110,11 @@ def _convert_ann_assignment(node: ast.AnnAssign) -> Assignment:
     if not is_our_type:
         type_ = VariableType(data=type_)
 
-    return Assignment(variable=node.target.id, expression=value, type=type_)
+    return Assignment(
+        variable=node.target.id,
+        expression=value,
+        type=cast(VariableType | AllTypes, type_),
+    )
 
 
 def _convert_assignment(node: ast.Assign) -> Assignment:
@@ -125,7 +130,7 @@ def _convert_assignment(node: ast.Assign) -> Assignment:
 
     # Support a few obvious ones, such as constructor calls or literal values.
     type_ = None
-    if isinstance(value, get_args(Value)):
+    if isinstance(value, Value):
         type_ = value.type
     elif isinstance(value, FunctionCall) and value.type == FunctionType.CONSTRUCTOR:
         type_ = VariableType(data=value.name)
@@ -135,6 +140,7 @@ def _convert_assignment(node: ast.Assign) -> Assignment:
             f"Could not deduce the type of variable {variable.id}: add a type annotation."
         )
 
+    assert isinstance(type_, AllTypes | VariableType)
     return Assignment(variable=variable.id, expression=value, type=type_)
 
 
@@ -162,7 +168,8 @@ def _convert_call(node: ast.Call) -> FunctionCall:
     for keyword in node.keywords:
         arguments.append(
             NamedArgument(
-                name=keyword.arg, value=_convert_expression(keyword.value, False)
+                name=cast(str, keyword.arg),
+                value=_convert_expression(keyword.value, False),
             )
         )
 
@@ -184,6 +191,7 @@ def _convert_constant(node: ast.Constant) -> Value:
 def _convert_expression(node: ast.expr, is_return: bool) -> Expression:
     if _is_type_cast(node):
         assert isinstance(node, ast.Call)
+        assert isinstance(node.func, ast.Name)
 
         # "Casts" of sequence types can also be used a constructor for an empty sequence.
         # For example, "set()", "map()", ...
@@ -210,7 +218,7 @@ def _convert_expression(node: ast.expr, is_return: bool) -> Expression:
             subexpression = node.args[0]
             value = _convert_expression(subexpression, is_return)
 
-            if not isinstance(value, get_args(Value)):
+            if not isinstance(value, Value):
                 raise InvalidDslError(
                     "The argument of a cast function must resolve to a value."
                 )
@@ -254,7 +262,8 @@ def _convert_expression(node: ast.expr, is_return: bool) -> Expression:
     elif isinstance(node, ast.Dict):
         elements = [
             ObjectKeyValuePair(
-                _convert_expression(k, is_return), _convert_expression(v, is_return)
+                key=_convert_expression(cast(ast.expr, k), is_return),
+                value=_convert_expression(v, is_return),
             )
             for k, v in zip(node.keys, node.values)
         ]
@@ -269,6 +278,7 @@ def _convert_expression(node: ast.expr, is_return: bool) -> Expression:
         value = _convert_constant(node.operand)
         if not isinstance(value, NumberType):
             raise InvalidDslError("'-' is only supported on literal numbers")
+        assert isinstance(value.data, Decimal | int | float)
         return NumberType(type=value.type, data=-value.data)
     else:
         raise InvalidDslError(f"Unsupported expression type: {type(node)}")
@@ -303,6 +313,16 @@ def _translate_to_ast(node: ast.Interactive, is_return: bool) -> Statement:
         return _convert_statement(statement_or_expression)
 
 
+@overload
+def parse_string(code: str, is_return: Literal[True]) -> Value:
+    ...
+
+
+@overload
+def parse_string(code: str, is_return: Literal[False] = False) -> Statement:
+    ...
+
+
 def parse_string(code: str, is_return=False) -> Statement:
     """
     Parse a string with Python code into our AST.