SL-9970 Refactored unit test

Author: andra-pascale-henke

cppsqlite.test.cpp

@@ -79,13 +79,14 @@ TEST(DbTest, openDir_ShouldThrow)
         std::cout << "Test cannot run: Failed to create test directory" << std::endl;
         return;
     }
+    std::string expectedErrMsg;
 #ifdef OS_Windows
-    EXPECT_THROW_WITH_MSG(db.open(tmp_dir.string().c_str(), SQLITE_OPEN_READONLY), CppSQLite3Exception,
-                          "SQLITE_CANTOPEN[14]: unable to open database file (SQLITE_CANTOPEN_ISDIR)");
+    expectedErrMsg = "SQLITE_CANTOPEN[14]: unable to open database file (SQLITE_CANTOPEN_ISDIR)";
 #else
-    EXPECT_THROW_WITH_MSG(db.open(tmp_dir.string().c_str(), SQLITE_OPEN_READONLY), CppSQLite3Exception,
-                          "SQLITE_IOERR[10]: disk I/O error (SQLITE_IOERR_READ)");
+    expectedErrMsg = "SQLITE_IOERR[10]: disk I/O error (SQLITE_IOERR_READ)";
 #endif
+    EXPECT_THROW_WITH_MSG(db.open(tmp_dir.string().c_str(), SQLITE_OPEN_READONLY), CppSQLite3Exception,
+                          expectedErrMsg.c_str());
     std::filesystem::remove(tmp_dir);
 }
 TEST(DbTest, writingToReadOnlyDatabaseShouldFail)