Fixes :httpc's response body should be a charlist.

lib/exvcr/adapter/httpc.ex

@@ -56,7 +56,7 @@ defmodule ExVCR.Adapter.Httpc do
   defp apply_filters({:ok, {status_code, headers, body}}) do
     replaced_body = to_string(body) |> ExVCR.Filter.filter_sensitive_data
     filtered_headers = ExVCR.Filter.remove_blacklisted_headers(headers)
-    {:ok, {status_code, filtered_headers, replaced_body}}
+    {:ok, {status_code, filtered_headers, to_char_list(replaced_body)}}
   end
 
   defp apply_filters({:error, reason}) do

lib/exvcr/adapter/httpc/converter.ex

@@ -36,6 +36,15 @@ defmodule ExVCR.Adapter.Httpc.Converter do
         response
       end
 
+    response =
+      if response.body do
+        body = response.body
+                |> convert_string_to_char_list()
+        %{response | body: body}
+      else
+        response
+      end
+
     response
   end
 

test/recorder_httpc_test.exs

@@ -23,27 +23,27 @@ defmodule ExVCR.RecorderHttpcTest do
   test "forcefully getting response from server by removing json in advance" do
     use_cassette "server1" do
       {:ok, {_, _, body}} = :httpc.request(@url)
-      assert body =~ ~r/test_response/
+      assert to_string(body) =~ ~r/test_response/
     end
   end
 
   test "forcefully getting response from server, then loading from cache by recording twice" do
     use_cassette "server2" do
       {:ok, {_, _, body}} = :httpc.request(@url)
-      assert body =~ ~r/test_response/
+      assert to_string(body) =~ ~r/test_response/
     end
 
     use_cassette "server2" do
       {:ok, {_, _, body}} = :httpc.request(@url)
-      assert body =~ ~r/test_response/
+      assert to_string(body) =~ ~r/test_response/
     end
   end
 
   test "replace sensitive data in body" do
     ExVCR.Config.filter_sensitive_data("test_response", "PLACEHOLDER")
     use_cassette "server_sensitive_data_in_body" do
       {:ok, {_, _, body}} = :httpc.request(@url)
-      assert body =~ ~r/PLACEHOLDER/
+      assert to_string(body) =~ ~r/PLACEHOLDER/
     end
     ExVCR.Config.filter_sensitive_data(nil)
   end
@@ -52,7 +52,7 @@ defmodule ExVCR.RecorderHttpcTest do
     ExVCR.Config.filter_sensitive_data("password=[a-z]+", "password=***")
     use_cassette "server_sensitive_data_in_query" do
       {:ok, {_, _, body}} = :httpc.request(@url_with_query)
-      assert body =~ ~r/test_response/
+      assert to_string(body) =~ ~r/test_response/
     end
 
     # The recorded cassette should contain replaced data.
@@ -67,7 +67,7 @@ defmodule ExVCR.RecorderHttpcTest do
     ExVCR.Config.filter_request_headers("X-My-Secret-Token")
     use_cassette "sensitive_data_in_request_header" do
       {:ok, {_, _, body}} = :httpc.request(:get, {@url_with_query, [{'X-My-Secret-Token', 'my-secret-token'}]}, [], [])
-      assert body == "test_response"
+      assert to_string(body) == "test_response"
     end
 
     # The recorded cassette should contain replaced data.
@@ -81,7 +81,7 @@ defmodule ExVCR.RecorderHttpcTest do
     ExVCR.Config.filter_url_params(true)
     use_cassette "example_ignore_url_params" do
       {:ok, {_, _, body}} = :httpc.request('#{@url}?should_not_be_contained')
-      assert body =~ ~r/test_response/
+      assert to_string(body) =~ ~r/test_response/
     end
     json = File.read!("#{__DIR__}/../#{@dummy_cassette_dir}/example_ignore_url_params.json")
     refute String.contains?(json, "should_not_be_contained")