Added string deduplication (closes #1303)

extras/tests/MixedConfiguration/enable_string_deduplication_0.cpp

@@ -0,0 +1,125 @@
+// ArduinoJson - arduinojson.org
+// Copyright Benoit Blanchon 2014-2020
+// MIT License
+
+#include "progmem_emulation.hpp"
+
+#define ARDUINOJSON_ENABLE_ARDUINO_STRING 1
+#define ARDUINOJSON_ENABLE_PROGMEM 1
+#define ARDUINOJSON_ENABLE_STRING_DEDUPLICATION 0
+#include <ArduinoJson.h>
+
+#include <catch.hpp>
+
+TEST_CASE("ARDUINOJSON_ENABLE_STRING_DEDUPLICATION = 0") {
+  StaticJsonDocument<1024> doc;
+
+  SECTION("deserializeJson()") {
+    SECTION("Deduplicate values") {
+      deserializeJson(doc, "[\"example\",\"example\"]");
+
+      CHECK(doc.memoryUsage() == JSON_ARRAY_SIZE(2) + 16);
+      CHECK(doc[0].as<char*>() != doc[1].as<char*>());
+    }
+
+    SECTION("Deduplicate keys") {
+      deserializeJson(doc, "[{\"example\":1},{\"example\":2}]");
+
+      CHECK(doc.memoryUsage() ==
+            2 * JSON_OBJECT_SIZE(1) + JSON_ARRAY_SIZE(2) + 16);
+
+      const char* key1 = doc[0].as<JsonObject>().begin()->key().c_str();
+      const char* key2 = doc[1].as<JsonObject>().begin()->key().c_str();
+
+      CHECK(key1 != key2);
+    }
+  }
+
+  SECTION("JsonDocument") {
+    SECTION("values") {
+      SECTION("std::string") {
+        doc.add(std::string("example"));
+        doc.add(std::string("example"));
+
+        CHECK(doc.memoryUsage() == JSON_ARRAY_SIZE(2) + 16);
+        CHECK(doc[0].as<char*>() != doc[1].as<char*>());
+      }
+
+      SECTION("char*") {
+        char value[] = "example";
+        doc.add(value);
+        doc.add(value);
+
+        CHECK(doc.memoryUsage() == JSON_ARRAY_SIZE(2) + 16);
+        CHECK(doc[0].as<char*>() != doc[1].as<char*>());
+      }
+
+      SECTION("Arduino String") {
+        doc.add(String("example"));
+        doc.add(String("example"));
+
+        CHECK(doc.memoryUsage() == JSON_ARRAY_SIZE(2) + 16);
+        CHECK(doc[0].as<char*>() != doc[1].as<char*>());
+      }
+
+      SECTION("Flash string") {
+        doc.add(F("example"));
+        doc.add(F("example"));
+
+        CHECK(doc.memoryUsage() == JSON_ARRAY_SIZE(2) + 16);
+        CHECK(doc[0].as<char*>() != doc[1].as<char*>());
+      }
+    }
+
+    SECTION("keys") {
+      SECTION("std::string") {
+        doc[0][std::string("example")] = 1;
+        doc[1][std::string("example")] = 2;
+
+        CHECK(doc.memoryUsage() ==
+              JSON_ARRAY_SIZE(2) + 2 * JSON_OBJECT_SIZE(1) + 16);
+
+        const char* key1 = doc[0].as<JsonObject>().begin()->key().c_str();
+        const char* key2 = doc[1].as<JsonObject>().begin()->key().c_str();
+        CHECK(key1 != key2);
+      }
+
+      SECTION("char*") {
+        char key[] = "example";
+        doc[0][key] = 1;
+        doc[1][key] = 2;
+
+        CHECK(doc.memoryUsage() ==
+              JSON_ARRAY_SIZE(2) + 2 * JSON_OBJECT_SIZE(1) + 16);
+
+        const char* key1 = doc[0].as<JsonObject>().begin()->key().c_str();
+        const char* key2 = doc[1].as<JsonObject>().begin()->key().c_str();
+        CHECK(key1 != key2);
+      }
+
+      SECTION("Arduino String") {
+        doc[0][String("example")] = 1;
+        doc[1][String("example")] = 2;
+
+        CHECK(doc.memoryUsage() ==
+              JSON_ARRAY_SIZE(2) + 2 * JSON_OBJECT_SIZE(1) + 16);
+
+        const char* key1 = doc[0].as<JsonObject>().begin()->key().c_str();
+        const char* key2 = doc[1].as<JsonObject>().begin()->key().c_str();
+        CHECK(key1 != key2);
+      }
+
+      SECTION("Flash string") {
+        doc[0][F("example")] = 1;
+        doc[1][F("example")] = 2;
+
+        CHECK(doc.memoryUsage() ==
+              JSON_ARRAY_SIZE(2) + 2 * JSON_OBJECT_SIZE(1) + 16);
+
+        const char* key1 = doc[0].as<JsonObject>().begin()->key().c_str();
+        const char* key2 = doc[1].as<JsonObject>().begin()->key().c_str();
+        CHECK(key1 != key2);
+      }
+    }
+  }
+}