TEST_P(ProtocolIntegrationTest, HeadersWithUnderscoresRemainByDefault) {
  initialize();
  codec_client_ = makeHttpConnection(lookupPort("http"));
  auto response = codec_client_->makeHeaderOnlyRequest(
      Http::TestRequestHeaderMapImpl{{":method", "GET"},
                                     {":path", "/test/long/url"},
                                     {":scheme", "http"},
                                     {":authority", "host"},
                                     {"foo_bar", "baz"}});
  waitForNextUpstreamRequest();

  EXPECT_THAT(upstream_request_->headers(), HeaderHasValueRef("foo_bar", "baz"));
  upstream_request_->encodeHeaders(
      Http::TestResponseHeaderMapImpl{{":status", "200"}, {"bar_baz", "fooz"}}, true);
  ASSERT_TRUE(response->waitForEndStream());
  EXPECT_TRUE(response->complete());
  EXPECT_EQ("200", response->headers().getStatusValue());
  EXPECT_THAT(response->headers(), HeaderHasValueRef("bar_baz", "fooz"));
}
TEST_P(ProtocolIntegrationTest, HeadersWithUnderscoresRemainByDefault) {
  initialize();
  codec_client_ = makeHttpConnection(lookupPort("http"));
  auto response = codec_client_->makeHeaderOnlyRequest(
      Http::TestRequestHeaderMapImpl{{":method", "GET"},
                                     {":path", "/test/long/url"},
                                     {":scheme", "http"},
                                     {":authority", "host"},
                                     {"foo_bar", "baz"}});
  waitForNextUpstreamRequest();

  EXPECT_THAT(upstream_request_->headers(), HeaderHasValueRef("foo_bar", "baz"));
  upstream_request_->encodeHeaders(
      Http::TestResponseHeaderMapImpl{{":status", "200"}, {"bar_baz", "fooz"}}, true);
  ASSERT_TRUE(response->waitForEndStream());
  EXPECT_TRUE(response->complete());
  EXPECT_EQ("200", response->headers().getStatusValue());
  EXPECT_THAT(response->headers(), HeaderHasValueRef("bar_baz", "fooz"));
}