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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
94 lines
2.3 KiB
C++
94 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::isNull()") {
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DynamicJsonDocument doc(4096);
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JsonVariant variant = doc.to<JsonVariant>();
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SECTION("returns true when Undefined") {
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REQUIRE(variant.isNull() == true);
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}
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SECTION("returns false when Integer") {
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variant.set(42);
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REQUIRE(variant.isNull() == false);
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}
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SECTION("returns false when EmptyArray") {
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DynamicJsonDocument doc2(4096);
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JsonArray array = doc2.to<JsonArray>();
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variant.set(array);
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REQUIRE(variant.isNull() == false);
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}
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SECTION("returns false when EmptyObject") {
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DynamicJsonDocument doc2(4096);
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JsonObject obj = doc2.to<JsonObject>();
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variant.set(obj);
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REQUIRE(variant.isNull() == false);
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}
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SECTION("returns true after set(JsonArray())") {
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variant.set(JsonArray());
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REQUIRE(variant.isNull() == true);
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}
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SECTION("returns true after set(JsonObject())") {
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variant.set(JsonObject());
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REQUIRE(variant.isNull() == true);
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}
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SECTION("returns false after set('hello')") {
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variant.set("hello");
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REQUIRE(variant.isNull() == false);
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}
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SECTION("returns true after set((char*)0)") {
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variant.set(static_cast<char*>(0));
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REQUIRE(variant.isNull() == true);
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}
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SECTION("returns true after set((const char*)0)") {
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variant.set(static_cast<const char*>(0));
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REQUIRE(variant.isNull() == true);
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}
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SECTION("returns true after set(serialized((char*)0))") {
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variant.set(serialized(static_cast<char*>(0)));
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REQUIRE(variant.isNull() == true);
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}
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SECTION("returns true after set(serialized((const char*)0))") {
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variant.set(serialized(static_cast<const char*>(0)));
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REQUIRE(variant.isNull() == true);
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}
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SECTION("returns true for a shallow null copy") {
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StaticJsonDocument<128> doc2;
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variant.shallowCopy(doc2);
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CHECK(variant.isNull() == true);
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}
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SECTION("returns false for a shallow array copy") {
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StaticJsonDocument<128> doc2;
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doc2[0] = 42;
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variant.shallowCopy(doc2);
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CHECK(variant.isNull() == false);
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}
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SECTION("works with JsonVariantConst") {
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variant.set(42);
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JsonVariantConst cvar = variant;
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REQUIRE(cvar.isNull() == false);
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}
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}
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