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libraries/ArduinoJson/extras/tests/JsonVariant/remove.cpp

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+// ArduinoJson - https://arduinojson.org
+// Copyright © 2014-2025, Benoit BLANCHON
+// MIT License
+
+#include <ArduinoJson.h>
+#include <stdint.h>
+#include <catch.hpp>
+
+#include "Allocators.hpp"
+#include "Literals.hpp"
+
+using ArduinoJson::detail::sizeofArray;
+
+TEST_CASE("JsonVariant::remove(int)") {
+  SpyingAllocator spy;
+  JsonDocument doc(&spy);
+
+  SECTION("release top level strings") {
+    doc.add("hello"_s);
+    doc.add("hello"_s);
+    doc.add("world"_s);
+
+    JsonVariant var = doc.as<JsonVariant>();
+    REQUIRE(var.as<std::string>() == "[\"hello\",\"hello\",\"world\"]");
+
+    spy.clearLog();
+    var.remove(1);
+    REQUIRE(var.as<std::string>() == "[\"hello\",\"world\"]");
+    REQUIRE(spy.log() == AllocatorLog{});
+
+    spy.clearLog();
+    var.remove(1);
+    REQUIRE(var.as<std::string>() == "[\"hello\"]");
+    REQUIRE(spy.log() == AllocatorLog{
+                             Deallocate(sizeofString("world")),
+                         });
+
+    spy.clearLog();
+    var.remove(0);
+    REQUIRE(var.as<std::string>() == "[]");
+    REQUIRE(spy.log() == AllocatorLog{
+                             Deallocate(sizeofString("hello")),
+                         });
+  }
+
+  SECTION("release strings in nested array") {
+    doc[0][0] = "hello"_s;
+
+    JsonVariant var = doc.as<JsonVariant>();
+    REQUIRE(var.as<std::string>() == "[[\"hello\"]]");
+
+    spy.clearLog();
+    var.remove(0);
+
+    REQUIRE(var.as<std::string>() == "[]");
+    REQUIRE(spy.log() == AllocatorLog{
+                             Deallocate(sizeofString("hello")),
+                         });
+  }
+}
+
+TEST_CASE("JsonVariant::remove(const char *)") {
+  JsonDocument doc;
+  JsonVariant var = doc.to<JsonVariant>();
+
+  var["a"] = 1;
+  var["b"] = 2;
+
+  var.remove("a");
+
+  REQUIRE(var.as<std::string>() == "{\"b\":2}");
+}
+
+TEST_CASE("JsonVariant::remove(std::string)") {
+  JsonDocument doc;
+  JsonVariant var = doc.to<JsonVariant>();
+
+  var["a"] = 1;
+  var["b"] = 2;
+
+  var.remove("b"_s);
+
+  REQUIRE(var.as<std::string>() == "{\"a\":1}");
+}
+
+#ifdef HAS_VARIABLE_LENGTH_ARRAY
+TEST_CASE("JsonVariant::remove(VLA)") {
+  JsonDocument doc;
+  JsonVariant var = doc.to<JsonVariant>();
+
+  var["a"] = 1;
+  var["b"] = 2;
+  size_t i = 16;
+  char vla[i];
+  strcpy(vla, "b");
+
+  var.remove("b"_s);
+
+  REQUIRE(var.as<std::string>() == "{\"a\":1}");
+}
+#endif
+
+TEST_CASE("JsonVariant::remove(JsonVariant) from object") {
+  JsonDocument doc;
+  JsonVariant var = doc.to<JsonVariant>();
+
+  var["a"] = "a";
+  var["b"] = 2;
+  var["c"] = "b";
+
+  var.remove(var["c"]);
+
+  REQUIRE(var.as<std::string>() == "{\"a\":\"a\",\"c\":\"b\"}");
+}
+
+TEST_CASE("JsonVariant::remove(JsonVariant) from array") {
+  JsonDocument doc;
+  JsonVariant var = doc.to<JsonVariant>();
+
+  var[0] = 3;
+  var[1] = 2;
+  var[2] = 1;
+
+  var.remove(var[2]);
+  var.remove(var[3]);  // noop
+
+  REQUIRE(var.as<std::string>() == "[3,1]");
+}