Added unit tests for Error codes

Author: andreagilardoni

test/CMakeLists.txt

@@ -49,6 +49,7 @@ set(TEST_SRCS
   src/Common/test_map.cpp
   src/Common/test_max.cpp
   src/Common/test_min.cpp
+  src/ErrorCodes/test_ErrorCodes.cpp
   src/IPAddress/test_toString.cpp
   src/IPAddress/test_fromString.cpp
   src/IPAddress/test_fromString6.cpp

test/src/ErrorCodes/test_ErrorCodes.cpp

@@ -0,0 +1,45 @@
+/*
+ * Copyright (c) 2020 Arduino.  All rights reserved.
+ *
+ * SPDX-License-Identifier: LGPL-2.1-or-later
+ */
+
+/**************************************************************************************
+ * INCLUDE
+ **************************************************************************************/
+
+#include <catch2/catch_test_macros.hpp>
+
+#include <api/ErrorCodes.h>
+
+using namespace arduino;
+
+/**************************************************************************************
+ * TEST CODE
+ **************************************************************************************/
+
+TEST_CASE ("An ErrorCode can be evaluated as boolean and respect Arduino values", "[ErrorCodes-Evaluation]") {
+  REQUIRE((bool)ErrorCode(1) == true);
+  REQUIRE((bool)ErrorCode(0) == false);
+}
+
+TEST_CASE ("An error is returned with a value different from 0 and 1", "[ErrorCodes-Evaluation]") {
+  THEN ("if the error is well defined the boolean evaluation of the error code respects Arduino standard") {
+    arduino::error_t err = 125;
+    ErrorCode ec(err);
+    REQUIRE((bool)ec == false);
+    REQUIRE(ec.error == err);
+  }
+  THEN ("if an int is provided the boolean evaluation of the error code respects Arduino standard and the value is not preserved") {
+    int err = 125;
+    ErrorCode ec(err);
+    REQUIRE((bool)ec == false);
+    REQUIRE(ec.error == ArduinoError);
+  }
+  THEN ("if an int is provided the boolean evaluation of the error code respects Arduino standard and the value is not preserved") {
+    ErrorCode ec(ArduinoELOOP);
+    REQUIRE((bool)ec == false);
+    REQUIRE(ec.error == ArduinoELOOP);
+  }
+}
+