Added unit tests for error_to_string

test/unit/error.cpp

@@ -0,0 +1,33 @@
+/*
+ * error.cpp
+ *
+ *  Created on: Jan 19, 2020
+ *      Author: ruben
+ */
+
+#include <gtest/gtest.h>
+#include "mysql/error.hpp"
+
+using namespace testing;
+using mysql::Error;
+using mysql::detail::error_to_string;
+
+TEST(Error, ErrorToString_Ok_ReturnsOk)
+{
+	EXPECT_STREQ(error_to_string(Error::ok), "no error");
+}
+
+TEST(Error, ErrorToString_MysqlAsioError_ReturnsDescription)
+{
+	EXPECT_STREQ(error_to_string(Error::sequence_number_mismatch), "Mismatched sequence numbers");
+}
+
+TEST(Error, ErrorToString_ServerError_ReturnsEnumName)
+{
+	EXPECT_STREQ(error_to_string(Error::bad_db_error), "bad_db_error");
+}
+
+TEST(Error, ErrorToString_UnknownError_ReturnsUnknown)
+{
+	EXPECT_STREQ(error_to_string(static_cast<Error>(0xfffefdfc)), "<unknown error>");
+}