Moved ancillary files to extras/ (fixes #1011)

extras/tests/JsonDocument/subscript.cpp

@@ -0,0 +1,45 @@
+// ArduinoJson - arduinojson.org
+// Copyright Benoit Blanchon 2014-2019
+// MIT License
+
+#include <ArduinoJson.h>
+#include <catch.hpp>
+
+TEST_CASE("JsonDocument::operator[]") {
+  DynamicJsonDocument doc(4096);
+  const JsonDocument& cdoc = doc;
+
+  SECTION("object") {
+    deserializeJson(doc, "{\"hello\":\"world\"}");
+
+    SECTION("const char*") {
+      REQUIRE(doc["hello"] == "world");
+      REQUIRE(cdoc["hello"] == "world");
+    }
+
+    SECTION("std::string") {
+      REQUIRE(doc[std::string("hello")] == "world");
+      REQUIRE(cdoc[std::string("hello")] == "world");
+    }
+
+    SECTION("supports operator|") {
+      REQUIRE((doc["hello"] | "nope") == std::string("world"));
+      REQUIRE((doc["world"] | "nope") == std::string("nope"));
+    }
+  }
+
+  SECTION("array") {
+    deserializeJson(doc, "[\"hello\",\"world\"]");
+
+    REQUIRE(doc[1] == "world");
+    REQUIRE(cdoc[1] == "world");
+  }
+}
+
+TEST_CASE("JsonDocument automatically promotes to object") {
+  DynamicJsonDocument doc(4096);
+
+  doc["one"]["two"]["three"] = 4;
+
+  REQUIRE(doc["one"]["two"]["three"] == 4);
+}