Consolidate test fixtures

tests/fixtures.py

@@ -0,0 +1,8 @@
+import pytest  # type: ignore
+from typing import Type
+from monads import Maybe, Result, Reader
+
+
+@pytest.fixture(scope="module", params=[Maybe, Result])
+def monad(request) -> Type:
+    return request.param

tests/test_applicatives.py

@@ -1,17 +1,13 @@
 import pytest  # type: ignore
-from typing import Callable, Type, TypeVar
+from typing import Callable, TypeVar
 
-from monads import Applicative, Functor, Maybe, Result
+from monads import Applicative
+from .fixtures import monad
 
 T = TypeVar("T")
 S = TypeVar("S")
 
 
-@pytest.fixture(scope="module", params=[Maybe, Result])
-def monad(request) -> Type:
-    return request.param
-
-
 def test_fmap_using_ap(monad) -> None:
     f: Callable[[int], int] = lambda x: x + 1
     m: Applicative[int] = monad.pure(3)

tests/test_functors.py

@@ -1,16 +1,13 @@
 import pytest  # type: ignore
-from typing import Callable, Type, TypeVar
-from monads import Functor, Maybe, Result
+from typing import Callable, TypeVar
+
+from monads import Functor
+from .fixtures import monad
 
 T = TypeVar("T")
 S = TypeVar("S")
 
 
-@pytest.fixture(scope="module", params=[Maybe, Result])
-def monad(request) -> Type:
-    return request.param
-
-
 def test_identity(monad) -> None:
     m: Functor = monad.pure(3)
     identity: Callable[[T], T] = lambda x: x

tests/test_monads.py

@@ -1,11 +1,7 @@
 import pytest  # type: ignore
-from typing import List, Type
-from monads import Monad, Maybe, Result
 
-
-@pytest.fixture(scope="module", params=[Maybe, Result])
-def monad(request) -> Type:
-    return request.param
+from monads import Monad
+from .fixtures import monad
 
 
 def test_bind(monad) -> None:

tests/test_monoids.py

@@ -1,5 +1,6 @@
 import pytest  # type: ignore
 from typing import Any, Callable, Type
+
 from monads.monoid import Monoid
 from monads.maybe import First, Last, Just