small fixes to coverage, type hints, documentation, and QoL for Makefile

CONTRIBUTING.rst

@@ -22,6 +22,7 @@ For example, using *virtualenvwrapper* commands could look like::
 
 After that, please install libraries required for development::
 
+    $ pip install pip-tools
     $ pip-compile requirements-dev.in
     $ pip-sync requirements-dev.txt
 

Makefile

@@ -1,6 +1,7 @@
 # Some simple testing tasks (sorry, UNIX only).
 
-FLAGS=
+# ?= conditional assign, so users can pass options on the CLI instead of manually editing this file
+FLAGS?=
 
 pre-commit flake: checkrst
 	pre-commit run --all
@@ -22,7 +23,7 @@ cov cover coverage: pre-commit
 mototest:
 	docker pull alpine
 	docker pull lambci/lambda:python3.8
-	BOTO_CONFIG=/dev/null python -Wd -X tracemalloc=5 -X faulthandler -m pytest -vv -m moto -n auto --cov-report term --cov-report html --cov-report xml --cov=aiobotocore --cov=tests --log-cli-level=DEBUG aiobotocore tests
+	BOTO_CONFIG=/dev/null python -Wd -X tracemalloc=5 -X faulthandler -m pytest -vv -m moto -n auto --cov-report term --cov-report html --cov-report xml --cov=aiobotocore --cov=tests --log-cli-level=DEBUG $(FLAGS) aiobotocore tests
 	@echo "open file://`pwd`/htmlcov/index.html"
 
 clean:

README.rst

@@ -167,10 +167,11 @@ secret accessible via environment variables:
 ::
 
     $ pip install pip-tools
-    $ pip-compile requirements-dev.txt
+    $ pip-compile requirements-dev.in
     $ pip-sync requirements-dev.txt
     $ export AWS_ACCESS_KEY_ID=xxx
     $ export AWS_SECRET_ACCESS_KEY=xxx
+    $ export AWS_DEFAULT_REGION=xxx # e.g. us-west-2
 
 Execute tests suite:
 

pyproject.toml

@@ -16,3 +16,8 @@ src_paths = ["aiobotocore", "tests"]
 [tool.black]
 line-length = 79
 skip_string_normalization = true
+
+[tool.coverage.report]
+exclude_also = [
+    "if TYPE_CHECKING",
+]

tests/boto_tests/test_utils.py

@@ -1,6 +1,8 @@
+from __future__ import annotations
+
 import itertools
 import json
-from typing import List, Tuple, Union
+from typing import Iterator, Tuple, Union
 
 import pytest
 from botocore.exceptions import ReadTimeoutError
@@ -9,18 +11,17 @@
 from aiobotocore import utils
 from aiobotocore._helpers import asynccontextmanager
 
+# TypeAlias (requires typing_extensions or >=3.10 to annotate)
+Response = Tuple[Union[str, object], int]
+
 
 # From class TestContainerMetadataFetcher
-def fake_aiohttp_session(
-    responses: Union[
-        List[Tuple[Union[str, object], int]], Tuple[Union[str, object], int]
-    ]
-):
+def fake_aiohttp_session(responses: list[Response] | Response):
     """
     Dodgy shim class
     """
-    if isinstance(responses, Tuple):
-        data = itertools.cycle([responses])
+    if isinstance(responses, tuple):
+        data: Iterator[Response] = itertools.cycle([responses])
     else:
         data = iter(responses)
 
@@ -83,9 +84,7 @@ async def test_idmsfetcher_disabled():
 @pytest.mark.asyncio
 async def test_idmsfetcher_get_token_success():
     session = fake_aiohttp_session(
-        [
-            ('blah', 200),
-        ]
+        ('blah', 200),
     )
 
     fetcher = utils.AioIMDSFetcher(
@@ -99,9 +98,7 @@ async def test_idmsfetcher_get_token_success():
 @pytest.mark.asyncio
 async def test_idmsfetcher_get_token_not_found():
     session = fake_aiohttp_session(
-        [
-            ('blah', 404),
-        ]
+        ('blah', 404),
     )
 
     fetcher = utils.AioIMDSFetcher(
@@ -115,9 +112,7 @@ async def test_idmsfetcher_get_token_not_found():
 @pytest.mark.asyncio
 async def test_idmsfetcher_get_token_bad_request():
     session = fake_aiohttp_session(
-        [
-            ('blah', 400),
-        ]
+        ('blah', 400),
     )
 
     fetcher = utils.AioIMDSFetcher(