Added support for non zero-terminated strings (fixes #704)

test/JsonSerializer/CMakeLists.txt

@@ -8,6 +8,8 @@ add_executable(JsonSerializerTests
 	JsonObject.cpp
 	JsonObjectPretty.cpp
 	JsonVariant.cpp
+	std_stream.cpp
+	std_string.cpp
 )
 
 target_link_libraries(JsonSerializerTests catch)

test/JsonSerializer/std_stream.cpp

@@ -0,0 +1,64 @@
+// ArduinoJson - arduinojson.org
+// Copyright Benoit Blanchon 2014-2018
+// MIT License
+
+#include <ArduinoJson.h>
+#include <catch.hpp>
+#include <sstream>
+
+TEST_CASE("operator<<(std::ostream)") {
+  DynamicJsonDocument doc;
+  std::ostringstream os;
+
+  SECTION("JsonVariant containing false") {
+    JsonVariant variant = false;
+
+    os << variant;
+
+    REQUIRE("false" == os.str());
+  }
+
+  SECTION("JsonVariant containing string") {
+    JsonVariant variant = "coucou";
+
+    os << variant;
+
+    REQUIRE("\"coucou\"" == os.str());
+  }
+
+  SECTION("JsonObject") {
+    JsonObject& object = doc.to<JsonObject>();
+    object["key"] = "value";
+
+    os << object;
+
+    REQUIRE("{\"key\":\"value\"}" == os.str());
+  }
+
+  SECTION("JsonObjectSubscript") {
+    JsonObject& object = doc.to<JsonObject>();
+    object["key"] = "value";
+
+    os << object["key"];
+
+    REQUIRE("\"value\"" == os.str());
+  }
+
+  SECTION("JsonArray") {
+    JsonArray& array = doc.to<JsonArray>();
+    array.add("value");
+
+    os << array;
+
+    REQUIRE("[\"value\"]" == os.str());
+  }
+
+  SECTION("JsonArraySubscript") {
+    JsonArray& array = doc.to<JsonArray>();
+    array.add("value");
+
+    os << array[0];
+
+    REQUIRE("\"value\"" == os.str());
+  }
+}

test/JsonSerializer/std_string.cpp

@@ -0,0 +1,47 @@
+// ArduinoJson - arduinojson.org
+// Copyright Benoit Blanchon 2014-2018
+// MIT License
+
+#include <ArduinoJson.h>
+#include <catch.hpp>
+
+TEST_CASE("serialize JsonArray to std::string") {
+  DynamicJsonDocument doc;
+  JsonArray &array = doc.to<JsonArray>();
+  array.add(4);
+  array.add(2);
+
+  SECTION("serializeJson()") {
+    std::string json;
+    serializeJson(array, json);
+
+    REQUIRE(std::string("[4,2]") == json);
+  }
+
+  SECTION("serializeJsonPretty") {
+    std::string json;
+    serializeJsonPretty(array, json);
+
+    REQUIRE(std::string("[\r\n  4,\r\n  2\r\n]") == json);
+  }
+}
+
+TEST_CASE("serialize JsonObject to std::string") {
+  DynamicJsonDocument doc;
+  JsonObject &obj = doc.to<JsonObject>();
+  obj["key"] = "value";
+
+  SECTION("object") {
+    std::string json;
+    serializeJson(doc, json);
+
+    REQUIRE(std::string("{\"key\":\"value\"}") == json);
+  }
+
+  SECTION("serializeJsonPretty") {
+    std::string json;
+    serializeJsonPretty(doc, json);
+
+    REQUIRE(std::string("{\r\n  \"key\": \"value\"\r\n}") == json);
+  }
+}