Moved ancillary files to extras/ (fixes #1011)

extras/tests/JsonVariant/isnull.cpp

@@ -0,0 +1,80 @@
+// ArduinoJson - arduinojson.org
+// Copyright Benoit Blanchon 2014-2019
+// MIT License
+
+#include <ArduinoJson.h>
+#include <catch.hpp>
+
+TEST_CASE("JsonVariant::isNull()") {
+  DynamicJsonDocument doc(4096);
+  JsonVariant variant = doc.to<JsonVariant>();
+
+  SECTION("return true when Undefined") {
+    REQUIRE(variant.isNull() == true);
+  }
+
+  SECTION("return false when Integer") {
+    variant.set(42);
+
+    REQUIRE(variant.isNull() == false);
+  }
+
+  SECTION("return false when EmptyArray") {
+    DynamicJsonDocument doc2(4096);
+    JsonArray array = doc2.to<JsonArray>();
+
+    variant.set(array);
+    REQUIRE(variant.isNull() == false);
+  }
+
+  SECTION("return false when EmptyObject") {
+    DynamicJsonDocument doc2(4096);
+    JsonObject obj = doc2.to<JsonObject>();
+
+    variant.set(obj);
+    REQUIRE(variant.isNull() == false);
+  }
+
+  SECTION("return true after set(JsonArray())") {
+    variant.set(JsonArray());
+    REQUIRE(variant.isNull() == true);
+  }
+
+  SECTION("return true after set(JsonObject())") {
+    variant.set(JsonObject());
+    REQUIRE(variant.isNull() == true);
+  }
+
+  SECTION("return false after set('hello')") {
+    variant.set("hello");
+    REQUIRE(variant.isNull() == false);
+  }
+
+  SECTION("return true after set((char*)0)") {
+    variant.set(static_cast<char*>(0));
+    REQUIRE(variant.isNull() == true);
+  }
+
+  SECTION("return true after set((const char*)0)") {
+    variant.set(static_cast<const char*>(0));
+    REQUIRE(variant.isNull() == true);
+  }
+
+  SECTION("return true after set(serialized((char*)0))") {
+    variant.set(serialized(static_cast<char*>(0)));
+    REQUIRE(variant.isNull() == true);
+  }
+
+  SECTION("return true after set(serialized((const char*)0))") {
+    variant.set(serialized(static_cast<const char*>(0)));
+    REQUIRE(variant.isNull() == true);
+  }
+
+  SECTION("works with JsonVariantConst") {
+    variant.set(42);
+
+    JsonVariantConst cvar = variant;
+
+    REQUIRE(cvar.isNull() == false);
+  }
+}