Introduce ModSecurityTestContext to encapsulate setup of objects required to execute transactions

- Simplifies memory management on error conditions
- Context will be used in unit tests too, in order to provide
  Transaction related instances.

test/common/custom_debug_log.cc

@@ -0,0 +1,53 @@
+/*
+ * ModSecurity, http://www.modsecurity.org/
+ * Copyright (c) 2015 - 2021 Trustwave Holdings, Inc. (http://www.trustwave.com/)
+ *
+ * You may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * If any of the files related to licensing are missing or if you have any
+ * other questions related to licensing please contact Trustwave Holdings, Inc.
+ * directly using the email address security@modsecurity.org.
+ *
+ */
+
+#include "custom_debug_log.h"
+
+#include <iostream>
+#include <string>
+
+#include "modsecurity/debug_log.h"
+#include "src/utils/regex.h"
+
+namespace modsecurity_test {
+
+    CustomDebugLog::~CustomDebugLog() {}
+
+    void CustomDebugLog::write(int level, const std::string &message) {
+        m_log << "[" << level << "] " << message << std::endl;
+    }
+
+    void CustomDebugLog::write(int level, const std::string &id,
+        const std::string &uri, const std::string &msg) {
+        std::string msgf = "[" + std::to_string(level) + "] " + msg;
+        msgf = "[" + id + "] [" + uri + "] " + msgf;
+        m_log << msgf << std::endl;
+    }
+
+    bool const CustomDebugLog::contains(const std::string &pattern) const {
+        modsecurity::Utils::Regex re(pattern);
+        std::string s = m_log.str();
+        return modsecurity::Utils::regex_search(s, re);
+    }
+
+    std::string const CustomDebugLog::log_messages() const {
+        return m_log.str();
+    }
+
+    int CustomDebugLog::getDebugLogLevel() {
+        return 9;
+    }
+
+} // namespace modsecurity_test