add g-test for backtrace

test/c/CMakeLists.txt

@@ -31,6 +31,7 @@ include("${PROJECT_SOURCE_DIR}/cmake/gtest_helper.cmake")
 
 add_icon_c_test(UtilArithmeticExprTest ctest_util_arithmetic_expr.cpp)
 add_icon_c_test(UtilHashTest ctest_util_hash.cpp)
+add_icon_c_test(UtilBacktraceTest ctest_util_backtrace.cpp)
 
 file(WRITE "${CMAKE_CURRENT_BINARY_DIR}/util_file_test.txt"
      "This is a test file for unit tests for util_file.c\n")

test/c/ctest_util_backtrace.cpp

+
+#include <gtest/gtest.h>
+
+#include <util_backtrace.h>
+
+class UtilBacktraceCTest : public ::testing::Test {};
+
+bool ContainsSubstring(const std::string& str, const std::string& substr) {
+    return str.find(substr) != std::string::npos;
+}
+
+TEST_F(UtilBacktraceCTest, CanCallBacktrace) {
+
+    EXPECT_NO_THROW({ util_backtrace();});
+}
+
+TEST_F(UtilBacktraceCTest, PrintsCorrectBacktrace) {
+
+    testing::internal::CaptureStdout();
+
+    util_backtrace();
+
+    std::string output = testing::internal::GetCapturedStdout();
+
+    EXPECT_TRUE(ContainsSubstring(output,"util_backtrace"));
+    EXPECT_TRUE(ContainsSubstring(output,"libfortran-support"));
+    EXPECT_TRUE(ContainsSubstring(output,"UtilBacktraceCTest_PrintsCorrectBacktrace"));
+
+}