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https://github.com/bblanchon/ArduinoJson.git
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cd8373ad32
Instead of storing a pointer, the function copies the `VariantData`. Benefits: * smaller code * no impact on programs that don't use this feature Drawbacks: * changes to the original variant are not always reflected on the copy * modifying the original from the shallow copy leads to UB
96 lines
2.3 KiB
C++
96 lines
2.3 KiB
C++
// ArduinoJson - https://arduinojson.org
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// Copyright © 2014-2022, Benoit BLANCHON
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// MIT License
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#include <ArduinoJson.h>
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#include <catch.hpp>
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TEST_CASE("JsonVariant::set(JsonVariant)") {
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DynamicJsonDocument doc1(4096);
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DynamicJsonDocument doc2(4096);
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JsonVariant var1 = doc1.to<JsonVariant>();
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JsonVariant var2 = doc2.to<JsonVariant>();
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SECTION("stores JsonArray by copy") {
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JsonArray arr = doc2.to<JsonArray>();
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JsonObject obj = arr.createNestedObject();
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obj["hello"] = "world";
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var1.set(arr);
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arr[0] = 666;
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REQUIRE(var1.as<std::string>() == "[{\"hello\":\"world\"}]");
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}
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SECTION("stores JsonObject by copy") {
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JsonObject obj = doc2.to<JsonObject>();
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JsonArray arr = obj.createNestedArray("value");
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arr.add(42);
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var1.set(obj);
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obj["value"] = 666;
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REQUIRE(var1.as<std::string>() == "{\"value\":[42]}");
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}
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SECTION("stores const char* by reference") {
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var1.set("hello!!");
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var2.set(var1);
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REQUIRE(doc1.memoryUsage() == 0);
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REQUIRE(doc2.memoryUsage() == 0);
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}
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SECTION("stores char* by copy") {
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char str[] = "hello!!";
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var1.set(str);
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var2.set(var1);
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REQUIRE(doc1.memoryUsage() == JSON_STRING_SIZE(7));
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REQUIRE(doc2.memoryUsage() == JSON_STRING_SIZE(7));
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}
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SECTION("stores std::string by copy") {
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var1.set(std::string("hello!!"));
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var2.set(var1);
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REQUIRE(doc1.memoryUsage() == JSON_STRING_SIZE(7));
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REQUIRE(doc2.memoryUsage() == JSON_STRING_SIZE(7));
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}
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SECTION("stores Serialized<const char*> by reference") {
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var1.set(serialized("hello!!", 8));
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var2.set(var1);
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REQUIRE(doc1.memoryUsage() == 0);
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REQUIRE(doc2.memoryUsage() == 0);
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}
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SECTION("stores Serialized<char*> by copy") {
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char str[] = "hello!!";
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var1.set(serialized(str, 7));
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var2.set(var1);
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REQUIRE(doc1.memoryUsage() == JSON_STRING_SIZE(7));
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REQUIRE(doc2.memoryUsage() == JSON_STRING_SIZE(7));
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}
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SECTION("stores Serialized<std::string> by copy") {
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var1.set(serialized(std::string("hello!!")));
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var2.set(var1);
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REQUIRE(doc1.memoryUsage() == JSON_STRING_SIZE(7));
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REQUIRE(doc2.memoryUsage() == JSON_STRING_SIZE(7));
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}
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SECTION("destination is unbound") {
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JsonVariant unboundVariant;
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unboundVariant.set(var1);
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REQUIRE(unboundVariant.isUnbound());
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REQUIRE(unboundVariant.isNull());
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}
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}
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