Added JsonDocument::remove() and JsonVariant::remove()

test/JsonVariant/remove.cpp

@@ -0,0 +1,42 @@
+// ArduinoJson - arduinojson.org
+// Copyright Benoit Blanchon 2014-2019
+// MIT License
+
+#include <ArduinoJson.h>
+#include <stdint.h>
+#include <catch.hpp>
+
+static const char* null = 0;
+
+TEST_CASE("JsonVariant::remove()") {
+  DynamicJsonDocument doc(4096);
+  JsonVariant var = doc.to<JsonVariant>();
+
+  SECTION("remove(int)") {
+    var.add(1);
+    var.add(2);
+    var.add(3);
+
+    var.remove(1);
+
+    REQUIRE(var.as<std::string>() == "[1,3]");
+  }
+
+  SECTION("remove(const char *)") {
+    var["a"] = 1;
+    var["b"] = 2;
+
+    var.remove("a");
+
+    REQUIRE(var.as<std::string>() == "{\"b\":2}");
+  }
+
+  SECTION("remove(std::string)") {
+    var["a"] = 1;
+    var["b"] = 2;
+
+    var.remove(std::string("b"));
+
+    REQUIRE(var.as<std::string>() == "{\"a\":1}");
+  }
+}