Adding basic tests for 'Print::clearWriteError'

Author: aentinger

test/CMakeLists.txt

@@ -28,6 +28,7 @@ set(TEST_SRCS
   src/Common/test_makeWord.cpp
   src/Common/test_max.cpp
   src/Common/test_min.cpp
+  src/Print/test_clearWriteError.cpp
   src/Print/test_getWriteError.cpp
   src/Print/test_print.cpp
   src/Ringbuffer/test_available.cpp

test/src/Print/test_clearWriteError.cpp

@@ -0,0 +1,25 @@
+/*
+ * Copyright (c) 2020 Arduino.  All rights reserved.
+ */
+
+/**************************************************************************************
+ * INCLUDE
+ **************************************************************************************/
+
+#include <catch.hpp>
+
+#include <Print.h>
+
+#include <PrintMock.h>
+
+/**************************************************************************************
+ * TEST CODE
+ **************************************************************************************/
+
+TEST_CASE ("Clear write error should set the error code back to 0", "[Print-clearWriteError-01]")
+{
+  PrintMock mock;
+  mock.mock_setWriteError(5);
+  mock.clearWriteError();
+  REQUIRE(mock.getWriteError() == 0);
+}