Don't use JsonBuffer to create or parse objects and arrays.

* Added DynamicJsonArray and StaticJsonArray
* Added DynamicJsonObject and StaticJsonObject
* Added DynamicJsonVariant and StaticJsonVariant
* Added deserializeJson()
* Removed JsonBuffer::parseArray(), parseObject() and parse()
* Removed JsonBuffer::createArray() and createObject()

test/JsonParser/StaticJsonArray.cpp

@@ -0,0 +1,79 @@
+// ArduinoJson - arduinojson.org
+// Copyright Benoit Blanchon 2014-2018
+// MIT License
+
+#include <ArduinoJson.h>
+#include <catch.hpp>
+
+TEST_CASE("deserializeJson(StaticJsonArray&)") {
+  SECTION("BufferOfTheRightSizeForEmptyArray") {
+    StaticJsonArray<JSON_ARRAY_SIZE(0)> arr;
+    char input[] = "[]";
+
+    bool success = deserializeJson(arr, input);
+
+    REQUIRE(success == true);
+  }
+
+  SECTION("TooSmallBufferForArrayWithOneValue") {
+    StaticJsonArray<JSON_ARRAY_SIZE(1) - 1> arr;
+    char input[] = "[1]";
+
+    bool success = deserializeJson(arr, input);
+
+    REQUIRE(success == false);
+  }
+
+  SECTION("BufferOfTheRightSizeForArrayWithOneValue") {
+    StaticJsonArray<JSON_ARRAY_SIZE(1)> arr;
+    char input[] = "[1]";
+
+    bool success = deserializeJson(arr, input);
+
+    REQUIRE(success == true);
+  }
+
+  SECTION("TooSmallBufferForArrayWithNestedObject") {
+    StaticJsonArray<JSON_ARRAY_SIZE(1) + JSON_OBJECT_SIZE(0) - 1> arr;
+    char input[] = "[{}]";
+
+    bool success = deserializeJson(arr, input);
+
+    REQUIRE(success == false);
+  }
+
+  SECTION("BufferOfTheRightSizeForArrayWithNestedObject") {
+    StaticJsonArray<JSON_ARRAY_SIZE(1) + JSON_OBJECT_SIZE(0)> arr;
+    char input[] = "[{}]";
+
+    bool success = deserializeJson(arr, input);
+
+    REQUIRE(success == true);
+  }
+
+  SECTION("CharPtrNull") {
+    StaticJsonArray<100> arr;
+
+    bool success = deserializeJson(arr, static_cast<char*>(0));
+
+    REQUIRE(success == false);
+  }
+
+  SECTION("ConstCharPtrNull") {
+    StaticJsonArray<100> arr;
+
+    bool success = deserializeJson(arr, static_cast<const char*>(0));
+
+    REQUIRE(success == false);
+  }
+
+  SECTION("CopyStringNotSpaces") {
+    StaticJsonArray<100> arr;
+
+    deserializeJson(arr, "  [ \"1234567\" ] ");
+
+    REQUIRE(JSON_ARRAY_SIZE(1) + sizeof("1234567") == arr.memoryUsage());
+    // note: we use a string of 8 bytes to be sure that the StaticJsonBuffer
+    // will not insert bytes to enforce alignement
+  }
+}