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lib_standalone/ArduinoJson/extras/tests/JsonDeserializer/object_static.cpp

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+// ArduinoJson - arduinojson.org
+// Copyright Benoit Blanchon 2014-2020
+// MIT License
+
+#include <ArduinoJson.h>
+#include <catch.hpp>
+
+TEST_CASE("deserialize JSON object with StaticJsonDocument") {
+  SECTION("BufferOfTheRightSizeForEmptyObject") {
+    StaticJsonDocument<JSON_OBJECT_SIZE(0)> doc;
+    char input[] = "{}";
+
+    DeserializationError err = deserializeJson(doc, input);
+
+    REQUIRE(err == DeserializationError::Ok);
+  }
+
+  SECTION("TooSmallBufferForObjectWithOneValue") {
+    StaticJsonDocument<JSON_OBJECT_SIZE(0)> doc;
+    char input[] = "{\"a\":1}";
+
+    DeserializationError err = deserializeJson(doc, input);
+
+    REQUIRE(err == DeserializationError::NoMemory);
+  }
+
+  SECTION("BufferOfTheRightSizeForObjectWithOneValue") {
+    StaticJsonDocument<JSON_OBJECT_SIZE(1)> doc;
+    char input[] = "{\"a\":1}";
+
+    DeserializationError err = deserializeJson(doc, input);
+
+    REQUIRE(err == DeserializationError::Ok);
+  }
+
+  SECTION("TooSmallBufferForObjectWithNestedObject") {
+    StaticJsonDocument<JSON_OBJECT_SIZE(0) + JSON_ARRAY_SIZE(0)> doc;
+    char input[] = "{\"a\":[]}";
+
+    DeserializationError err = deserializeJson(doc, input);
+
+    REQUIRE(err == DeserializationError::NoMemory);
+  }
+
+  SECTION("BufferOfTheRightSizeForObjectWithNestedObject") {
+    StaticJsonDocument<JSON_OBJECT_SIZE(1) + JSON_ARRAY_SIZE(0)> doc;
+    char input[] = "{\"a\":[]}";
+
+    DeserializationError err = deserializeJson(doc, input);
+
+    REQUIRE(err == DeserializationError::Ok);
+  }
+
+  SECTION("Should clear the JsonObject") {
+    StaticJsonDocument<JSON_OBJECT_SIZE(1)> doc;
+    char input[] = "{\"hello\":\"world\"}";
+
+    deserializeJson(doc, input);
+    deserializeJson(doc, "{}");
+
+    REQUIRE(doc.as<JsonObject>().size() == 0);
+    REQUIRE(doc.memoryUsage() == JSON_OBJECT_SIZE(0));
+  }
+}