add arduino json lib

#182

lib/ArduinoJson/test/JsonVariant/subscript.cpp

@@ -0,0 +1,77 @@
+// ArduinoJson - arduinojson.org
+// Copyright Benoit Blanchon 2014-2018
+// MIT License
+
+#include <ArduinoJson.h>
+#include <catch.hpp>
+
+TEST_CASE("JsonVariant::operator[]") {
+  DynamicJsonBuffer _jsonBuffer;
+
+  SECTION("Array") {
+    JsonArray &array = _jsonBuffer.createArray();
+    array.add("element at index 0");
+    array.add("element at index 1");
+
+    JsonVariant var = array;
+
+    REQUIRE(2 == var.size());
+    REQUIRE(std::string("element at index 0") == var[0]);
+    REQUIRE(std::string("element at index 1") == var[1]);
+    REQUIRE(std::string("element at index 0") ==
+            var[static_cast<unsigned char>(0)]);  // issue #381
+    REQUIRE_FALSE(var[666].success());
+    REQUIRE_FALSE(var[3].success());
+    REQUIRE_FALSE(var["0"].success());
+  }
+
+  SECTION("Object") {
+    JsonObject &object = _jsonBuffer.createObject();
+    object["a"] = "element at key \"a\"";
+    object["b"] = "element at key \"b\"";
+
+    JsonVariant var = object;
+
+    REQUIRE(2 == var.size());
+    REQUIRE(std::string("element at key \"a\"") == var["a"]);
+    REQUIRE(std::string("element at key \"b\"") == var["b"]);
+    REQUIRE_FALSE(var["c"].success());
+    REQUIRE_FALSE(var[0].success());
+  }
+
+  SECTION("Undefined") {
+    JsonVariant var = JsonVariant();
+    REQUIRE(0 == var.size());
+    REQUIRE_FALSE(var["0"].success());
+    REQUIRE_FALSE(var[0].success());
+  }
+
+  SECTION("String") {
+    JsonVariant var = "hello world";
+    REQUIRE(0 == var.size());
+    REQUIRE_FALSE(var["0"].success());
+    REQUIRE_FALSE(var[0].success());
+  }
+
+  SECTION("ObjectSetValue") {
+    JsonVariant var = _jsonBuffer.createObject();
+    var["hello"] = "world";
+    REQUIRE(1 == var.size());
+    REQUIRE(std::string("world") == var["hello"]);
+  }
+
+  SECTION("ArraySetValue") {
+    JsonVariant var = _jsonBuffer.parseArray("[\"hello\"]");
+    var[0] = "world";
+    REQUIRE(1 == var.size());
+    REQUIRE(std::string("world") == var[0]);
+  }
+
+  SECTION("NestedObjectSetValue") {
+    JsonVariant var = _jsonBuffer.parseArray("[{}]");
+    var[0]["hello"] = "world";
+    REQUIRE(1 == var.size());
+    REQUIRE(1 == var[0].size());
+    REQUIRE(std::string("world") == var[0]["hello"]);
+  }
+}