make more fixes in tests

pyformlang/cfg/tests/test_recursive_decent_parser.py

@@ -10,7 +10,7 @@
 
 
 @pytest.fixture
-def parser() -> RecursiveDecentParser:
+def example_parser() -> RecursiveDecentParser:
     cfg = CFG.from_text("""
                 E -> S + S
                 E -> S * S
@@ -21,14 +21,16 @@ def parser() -> RecursiveDecentParser:
 
 
 class TestRecursiveDecentParser:
-    def test_creation(self, parser) -> None:
-        assert parser is not None
+    def test_creation(self,
+                      example_parser: RecursiveDecentParser) -> None:
+        assert example_parser is not None
 
-    def test_get_parsing_tree(self, parser) -> None:
-        assert parser.is_parsable(
+    def test_get_parsing_tree(self,
+                              example_parser: RecursiveDecentParser) -> None:
+        assert example_parser.is_parsable(
             ["(", "int", "+", "(", "int", "*", "int", ")", ")"]
         )
-        parse_tree = parser.get_parse_tree(
+        parse_tree = example_parser.get_parse_tree(
             ["(", "int", "+", "(", "int", "*", "int", ")", ")"]
         )
         derivation = parse_tree.get_leftmost_derivation()
@@ -93,10 +95,10 @@ def test_get_parsing_tree(self, parser) -> None:
             ],
         ]
 
-    def test_no_parse_tree(self, parser) -> None:
+    def test_no_parse_tree(self, example_parser: RecursiveDecentParser) -> None:
         with pytest.raises(NotParsableError):
-            parser.get_parse_tree([")"])
-        assert not (parser.is_parsable([")"]))
+            example_parser.get_parse_tree([")"])
+        assert not example_parser.is_parsable([")"])
 
     def test_infinite_recursion(self) -> None:
         cfg = CFG.from_text("""

pyformlang/fcfg/tests/test_fcfg.py

@@ -203,7 +203,7 @@ def test_contains(self) -> None:
         fcfg = FCFG(start_symbol=Variable("S"), productions=productions)
         self._sub_tests_contains1(fcfg)
 
-    def _sub_tests_contains1(self, fcfg) -> None:
+    def _sub_tests_contains1(self, fcfg: FCFG) -> None:
         assert fcfg.contains(["this", "flight", "serves"])
         assert ["this", "flight", "serves"] in fcfg
         assert fcfg.contains(["these", "flights", "serve"])

pyformlang/regular_expression/tests/test_regex.py

@@ -6,7 +6,8 @@
 from pyformlang.finite_automaton import EpsilonNFA
 from pyformlang.finite_automaton import DeterministicFiniteAutomaton
 from pyformlang.finite_automaton import State, Symbol, Epsilon
-from pyformlang.finite_automaton.tests.test_deterministic_finite_automaton import (
+from pyformlang.finite_automaton.tests.test_deterministic_finite_automaton \
+    import (
     get_example0,
     get_dfa_example,
     perform_tests_example0,