Add testcases for toAscii

Author: facchinm

test/CMakeLists.txt

@@ -90,6 +90,7 @@ set(TEST_SRCS
   src/WCharacter/test_isSpace.cpp
   src/WCharacter/test_isUpperCase.cpp
   src/WCharacter/test_isWhitespace.cpp
+  src/WCharacter/test_toAscii.cpp
 )
 
 set(TEST_DUT_SRCS

test/src/WCharacter/test_toAscii.cpp

@@ -0,0 +1,50 @@
+/*
+ * Copyright (c) 2020 Arduino.  All rights reserved.
+ */
+
+/**************************************************************************************
+ * INCLUDE
+ **************************************************************************************/
+
+#undef _GNU_SOURCE
+
+#include <catch.hpp>
+
+#include <vector>
+
+#include <WCharacter.h>
+
+/**************************************************************************************
+ * CONSTANTS
+ **************************************************************************************/
+
+std::vector<char> const VALID_ASCII_VECT = {' ', 'a', 'b', 'q', '\n', '\r'};
+
+/**************************************************************************************
+ * TEST CODE
+ **************************************************************************************/
+
+TEST_CASE ("toAscii(...) is called with a valid ascii character", "[toAscii-01]")
+{
+  std::for_each(std::begin(VALID_ASCII_VECT),
+                std::end  (VALID_ASCII_VECT),
+                [](char const c)
+                {
+                  REQUIRE(arduino::toAscii(c) == c);
+                });
+}
+
+TEST_CASE ("toAscii(...) is called with a invalid ascii character", "[toAscii-02]")
+{
+  REQUIRE(arduino::toAscii(0xf7) == 0x77);
+}
+
+TEST_CASE ("toAscii(...) is called with a invalid casted ascii character", "[toAscii-03]")
+{
+  REQUIRE(arduino::toAscii((unsigned char)0xf7) == 0x77);
+}
+
+TEST_CASE ("toAscii(...) is called with a character larger than 1 byte", "[toAscii-04]")
+{
+  REQUIRE(arduino::toAscii(0x3030) == 0x30);
+}