make cassettes human readable

tests/integration/test_httpx.py

@@ -285,3 +285,29 @@ def test_stream(tmpdir, httpbin, do_request):
         assert cassette_content == response_content
         assert len(cassette_content) == 512
         assert cassette.play_count == 1
+
+@pytest.mark.online
+def test_text_content_type(tmpdir, httpbin, do_request):
+    url = httpbin.url + "/json"
+
+    with vcr.use_cassette(str(tmpdir.join("json_type.yaml"))):
+        response = do_request()("GET", url)
+
+    with vcr.use_cassette(str(tmpdir.join("json_type.yaml"))) as cassette:
+        cassette_response = do_request()("GET", url)
+        assert cassette_response.content == response.content
+        assert cassette.play_count == 1
+        assert isinstance(cassette.responses[0]['content'], str)
+
+@pytest.mark.online
+def test_binary_content_type(tmpdir, httpbin, do_request):
+    url = httpbin.url + "/bytes/1024"
+
+    with vcr.use_cassette(str(tmpdir.join("json_type.yaml"))):
+        response = do_request()("GET", url)
+
+    with vcr.use_cassette(str(tmpdir.join("json_type.yaml"))) as cassette:
+        cassette_response = do_request()("GET", url)
+        assert cassette_response.content == response.content
+        assert cassette.play_count == 1
+        assert isinstance(cassette.responses[0]['content'], bytes)

vcr/stubs/httpx_stubs.py

@@ -33,12 +33,18 @@ def _transform_headers(httpx_response):
     return out
 
 
+
 def _to_serialized_response(httpx_response):
+    try:
+        content = httpx_response.content.decode("utf-8")
+    except UnicodeDecodeError:
+        content = httpx_response.content
+
     return {
         "status_code": httpx_response.status_code,
         "http_version": httpx_response.http_version,
         "headers": _transform_headers(httpx_response),
-        "content": httpx_response.content,
+        "content": content,
     }
 
 
@@ -58,6 +64,8 @@ def _from_serialized_headers(headers):
 @patch("httpx.Response.read", MagicMock())
 def _from_serialized_response(request, serialized_response, history=None):
     content = serialized_response.get("content")
+    if isinstance(content, str):
+        content = content.encode("utf-8")
     response = httpx.Response(
         status_code=serialized_response.get("status_code"),
         request=request,