Enable header matching (#1004)

Change the tests to enable header matching, and pass all headers in
accepts.

Author: therve

src/datadog_api_client/api_client.py

@@ -463,15 +463,7 @@ def select_header_accept(self, accepts):
         :param accepts: List of headers.
         :return: Accept (e.g. application/json).
         """
-        if not accepts:
-            return
-
-        accepts = [x.lower() for x in accepts]
-
-        if "application/json" in accepts:
-            return "application/json"
-        else:
-            return ", ".join(accepts)
+        return ", ".join(accepts)
 
     def select_header_content_type(self, content_types):
         """Returns `Content-Type` based on an array of content_types provided.

tests/conftest.py

@@ -277,9 +277,8 @@ def disable_recording(request):
 @pytest.fixture
 def vcr_config():
     config = dict(
-        filter_headers=("DD-API-KEY", "DD-APPLICATION-KEY"),
-        filter_query_parameters=("api_key", "application_key"),
-        match_on=["method", "scheme", "host", "port", "path", "query", "body"],
+        filter_headers=("DD-API-KEY", "DD-APPLICATION-KEY", "User-Agent", "Accept-Encoding"),
+        match_on=["method", "scheme", "host", "port", "path", "query", "body", "headers"],
     )
     if tracer:
         from urllib.parse import urlparse