Add unittest for chunked body

Author: tkan145

t/apicast-policy-camel.t

@@ -315,3 +315,108 @@ ETag: foobar
 <<EOF
 using proxy: http://127.0.0.1:$Test::Nginx::Util::PROXY_SSL_PORT,
 EOF
+
+=== TEST 5: chunked request using HTTPS proxy for backend.
+--- ONLY
+--- init eval
+$Test::Nginx::Util::PROXY_SSL_PORT = Test::APIcast::get_random_port();
+$Test::Nginx::Util::ENDPOINT_SSL_PORT = Test::APIcast::get_random_port();
+--- configuration random_port env eval
+<<EOF
+{
+  "services": [
+    {
+      "backend_version":  1,
+      "proxy": {
+        "api_backend": "https://localhost:$Test::Nginx::Util::ENDPOINT_SSL_PORT",
+        "proxy_rules": [
+          { "pattern": "/test", "http_method": "POST", "metric_system_name": "hits", "delta": 2 }
+        ],
+        "policy_chain": [
+          {
+            "name": "apicast.policy.apicast"
+          },
+          {
+            "name": "apicast.policy.camel",
+            "configuration": {
+                "https_proxy": "http://127.0.0.1:$Test::Nginx::Util::PROXY_SSL_PORT"
+            }
+          }
+        ]
+      }
+    }
+  ]
+}
+EOF
+--- backend
+  location /transactions/authrep.xml {
+    content_by_lua_block {
+      ngx.exit(ngx.OK)
+    }
+  }
+--- upstream eval
+<<EOF
+  # Endpoint config
+  listen $Test::Nginx::Util::ENDPOINT_SSL_PORT ssl;
+
+  ssl_certificate $Test::Nginx::Util::ServRoot/html/server.crt;
+  ssl_certificate_key $Test::Nginx::Util::ServRoot/html/server.key;
+
+  server_name _ default_server;
+
+  location /test {
+    access_by_lua_block {
+      assert = require('luassert')
+      local content_length = ngx.req.get_headers()["Content-Length"]
+      local encoding = ngx.req.get_headers()["Transfer-Encoding"]
+
+      -- This is due to the proxy_pass
+      -- Perhaps we should refactor the test
+      assert.falsy(encoding)
+      assert.equal('12', content_length)
+
+      ngx.req.read_body()
+      local body = ngx.req.get_body_data()
+      assert.equal('hello, world', body)
+
+      ngx.header["Content-Length"] = 0
+      ngx.exit(200)
+    }
+  }
+}
+server {
+  # Proxy config
+  listen $Test::Nginx::Util::PROXY_SSL_PORT ssl;
+
+  ssl_certificate $Test::Nginx::Util::ServRoot/html/server.crt;
+  ssl_certificate_key $Test::Nginx::Util::ServRoot/html/server.key;
+
+
+  server_name _ default_server;
+
+  location ~ /.* {
+    proxy_http_version 1.1;
+    proxy_pass https://\$http_host;
+  }
+EOF
+--- raw_request eval
+"POST /test?user_key=value HTTP/1.1\r
+Host: localhost\r
+Connection: close\r
+User-Agent: Test::APIcast::Blackbox\r
+ETag: foobar\r
+Transfer-Encoding: chunked\r
+\r
+7\r
+hello, \r
+5\r
+world\r
+0\r
+\r
+"
+--- error_code: 200
+--- user_files fixture=tls.pl eval
+--- error_log eval
+<<EOF
+using proxy: http://127.0.0.1:$Test::Nginx::Util::PROXY_SSL_PORT,
+EOF