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

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+// ArduinoJson - https://arduinojson.org
+// Copyright © 2014-2025, Benoit BLANCHON
+// MIT License
+
+#include <ArduinoJson.h>
+#include <catch.hpp>
+
+#include "Literals.hpp"
+
+TEST_CASE("JsonDocument::remove()") {
+  JsonDocument doc;
+
+  SECTION("remove(int)") {
+    doc.add(1);
+    doc.add(2);
+    doc.add(3);
+
+    doc.remove(1);
+
+    REQUIRE(doc.as<std::string>() == "[1,3]");
+  }
+
+  SECTION("string literal") {
+    doc["a"] = 1;
+    doc["a\0b"_s] = 2;
+    doc["b"] = 3;
+
+    doc.remove("a\0b");
+
+    REQUIRE(doc.as<std::string>() == "{\"a\":1,\"b\":3}");
+  }
+
+  SECTION("remove(const char *)") {
+    doc["a"] = 1;
+    doc["b"] = 2;
+
+    doc.remove(static_cast<const char*>("a"));
+
+    REQUIRE(doc.as<std::string>() == "{\"b\":2}");
+  }
+
+  SECTION("remove(std::string)") {
+    doc["a"] = 1;
+    doc["b"] = 2;
+
+    doc.remove("b"_s);
+
+    REQUIRE(doc.as<std::string>() == "{\"a\":1}");
+  }
+
+#ifdef HAS_VARIABLE_LENGTH_ARRAY
+  SECTION("remove(vla)") {
+    doc["a"] = 1;
+    doc["b"] = 2;
+
+    size_t i = 4;
+    char vla[i];
+    strcpy(vla, "b");
+    doc.remove(vla);
+
+    REQUIRE(doc.as<std::string>() == "{\"a\":1}");
+  }
+#endif
+
+  SECTION("remove(JsonVariant) from object") {
+    doc["a"] = 1;
+    doc["b"] = 2;
+    doc["c"] = "b";
+
+    doc.remove(doc["c"]);
+
+    REQUIRE(doc.as<std::string>() == "{\"a\":1,\"c\":\"b\"}");
+  }
+
+  SECTION("remove(JsonVariant) from array") {
+    doc[0] = 3;
+    doc[1] = 2;
+    doc[2] = 1;
+
+    doc.remove(doc[2]);
+    doc.remove(doc[3]);  // noop
+
+    REQUIRE(doc.as<std::string>() == "[3,1]");
+  }
+}