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

test/JsonDeserializer/std_istream.cpp

@@ -0,0 +1,73 @@
+// ArduinoJson - arduinojson.org
+// Copyright Benoit Blanchon 2014-2018
+// MIT License
+
+#include <ArduinoJson.h>
+#include <catch.hpp>
+#include <sstream>
+
+TEST_CASE("deserializeJson(std::istream&)") {
+  DynamicJsonDocument doc;
+
+  SECTION("array") {
+    std::istringstream json(" [ 42 /* comment */ ] ");
+
+    JsonError err = deserializeJson(doc, json);
+    JsonArray& arr = doc.as<JsonArray>();
+
+    REQUIRE(err == JsonError::Ok);
+    REQUIRE(1 == arr.size());
+    REQUIRE(42 == arr[0]);
+  }
+
+  SECTION("object") {
+    std::istringstream json(" { hello : world // comment\n }");
+
+    JsonError err = deserializeJson(doc, json);
+    JsonObject& obj = doc.as<JsonObject>();
+
+    REQUIRE(err == JsonError::Ok);
+    REQUIRE(1 == obj.size());
+    REQUIRE(std::string("world") == obj["hello"]);
+  }
+
+  SECTION("Should not read after the closing brace of an empty object") {
+    std::istringstream json("{}123");
+
+    deserializeJson(doc, json);
+
+    REQUIRE('1' == char(json.get()));
+  }
+
+  SECTION("Should not read after the closing brace") {
+    std::istringstream json("{\"hello\":\"world\"}123");
+
+    deserializeJson(doc, json);
+
+    REQUIRE('1' == char(json.get()));
+  }
+
+  SECTION("Should not read after the closing bracket of an empty array") {
+    std::istringstream json("[]123");
+
+    deserializeJson(doc, json);
+
+    REQUIRE('1' == char(json.get()));
+  }
+
+  SECTION("Should not read after the closing bracket") {
+    std::istringstream json("[\"hello\",\"world\"]123");
+
+    deserializeJson(doc, json);
+
+    REQUIRE('1' == char(json.get()));
+  }
+
+  SECTION("Should not read after the closing quote") {
+    std::istringstream json("\"hello\"123");
+
+    deserializeJson(doc, json);
+
+    REQUIRE('1' == char(json.get()));
+  }
+}