Adding unit test and refactoring

Added unit test for errormanager and refactored to simplify use of error_check() method.

tests/util/CMakeLists.txt

@@ -0,0 +1,18 @@
+
+
+cmake_minimum_required(VERSION 3.12)
+
+enable_testing()
+
+set (Boost_USE_STATIC_LIBS OFF)
+find_package(Boost COMPONENTS unit_test_framework)
+include_directories (${Boost_INCLUDE_DIRS} ../../src/)
+
+set (test_source
+./test_errormanager.cpp
+../../src/util/errormanager.c
+)
+
+add_executable(test_errormanager ${test_source})
+
+target_link_libraries(test_errormanager ${Boost_LIBRARIES})

tests/util/test_errormanager.cpp

@@ -0,0 +1,81 @@
+
+
+#define BOOST_TEST_MODULE errormanager
+#define BOOST_TEST_DYN_LINK
+#include <boost/test/unit_test.hpp>
+
+#include "util/errormanager.h"
+
+
+#define MESSAGE_STRING "This is unit testing!"
+
+
+void mock_lookup(int errcode, char *errmsg, int len)
+{
+    char *msg = NULL;
+
+    if (errcode == 100) {
+        msg = MESSAGE_STRING;
+    }
+    else {
+        msg = "";
+    }
+    strncpy(errmsg, msg, len);
+}
+
+boost::test_tools::predicate_result check_string(std::string test, std::string ref)
+{
+    if (ref.compare(test) == 0)
+        return true;
+    else
+        return false;
+}
+
+
+BOOST_AUTO_TEST_SUITE(test_errormanager)
+
+BOOST_AUTO_TEST_CASE (test_create_destroy)
+{
+    error_handle_t *error_handle = NULL;
+    error_handle = error_new_manager(&mock_lookup);
+
+    error_dst_manager(error_handle);
+}
+
+
+struct Fixture{
+    Fixture() {
+		error_message = NULL;
+        error_handle = error_new_manager(&mock_lookup);
+    }
+    ~Fixture() {
+        error_dst_manager(error_handle);
+        free(error_message);
+  }
+  int error;
+  error_handle_t *error_handle;
+  char *error_message;
+};
+
+
+BOOST_FIXTURE_TEST_CASE (test_set_clear, Fixture)
+{
+    error = error_set(error_handle, 100);
+    BOOST_CHECK(error == 100);
+
+    error_clear(error_handle);
+    error = error_check(error_handle, &error_message);
+    BOOST_CHECK(error == 0);
+    BOOST_CHECK(error_message == NULL);
+}
+
+BOOST_FIXTURE_TEST_CASE(test_set_check, Fixture)
+{
+    error = error_set(error_handle, 100);
+    BOOST_CHECK(error == 100);
+
+    error = error_check(error_handle, &error_message);
+    BOOST_CHECK(check_string(error_message, MESSAGE_STRING));
+}
+
+BOOST_AUTO_TEST_SUITE_END()