1 files changed, 91 insertions, 0 deletions
diff --git a/src/lib/testutils/test_to_element.h b/src/lib/testutils/test_to_element.h
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+++ b/src/lib/testutils/test_to_element.h
@@ -0,0 +1,91 @@
+// Copyright (C) 2017 Internet Systems Consortium, Inc. ("ISC")
+//
+// This Source Code Form is subject to the terms of the Mozilla Public
+// License, v. 2.0. If a copy of the MPL was not distributed with this
+// file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+#ifndef TEST_TO_ELEMENT_H
+#define TEST_TO_ELEMENT_H
+
+#include <cc/data.h>
+#include <cc/cfg_to_element.h>
+#include <gtest/gtest.h>
+#include <string>
+#ifdef HAVE_IS_BASE_OF
+#include <type_traits>
+#endif
+
+#ifndef CONFIG_H_WAS_INCLUDED
+#error config.h must be included before test_to_element.h
+#endif
+
+namespace isc {
+namespace test {
+
+/// @brief Return the difference between two strings
+///
+/// Use the gtest >= 1.8.0 tool which builds the difference between
+/// two vectors of lines.
+///
+/// @param left left string
+/// @param right right string
+/// @return the unified diff between left and right
+std::string generateDiff(std::string left, std::string right);
+
+/// @brief Run a test using toElement() method with a string
+///
+/// @tparam Cfg the class implementing the toElement() method
+/// @param expected the expected textual value
+/// @param cfg an instance of the Cfg class
+template<typename Cfg>
+void runToElementTest(const std::string& expected, const Cfg& cfg) {
+    using namespace isc::data;
+#ifdef HAVE_IS_BASE_OF
+    static_assert(std::is_base_of<CfgToElement, Cfg>::value,
+                  "CfgToElement is not a base of the template parameter");
+#endif
+    ConstElementPtr json;
+    ASSERT_NO_THROW(json = Element::fromJSON(expected)) << expected;
+    ConstElementPtr unparsed;
+    ASSERT_NO_THROW(unparsed = cfg.toElement());
+    if (!isEquivalent(json, unparsed)) {
+        std::string wanted = prettyPrint(json);
+        std::string got = prettyPrint(unparsed);
+        ADD_FAILURE() << "Expected:\n" << wanted << "\n"
+                      << "Actual:\n" << got
+#ifdef HAVE_CREATE_UNIFIED_DIFF
+                      << "\nDiff:\n" << generateDiff(wanted, got)
+#endif
+                      << "\n";
+    }
+}
+
+/// @brief Run a test using toElement() method with an Element
+///
+/// @tparam Cfg the class implementing the toElement() method
+/// @param expected the expected element value
+/// @param cfg an instance of the Cfg class
+template<typename Cfg>
+void runToElementTest(isc::data::ConstElementPtr expected, const Cfg& cfg) {
+#ifdef HAVE_IS_BASE_OF
+    static_assert(std::is_base_of<isc::data::CfgToElement, Cfg>::value,
+                  "CfgToElement is not a base of the template parameter");
+#endif
+    isc::data::ConstElementPtr unparsed;
+    ASSERT_NO_THROW(unparsed = cfg.toElement());
+    if (!isEquivalent(expected, unparsed)) {
+        std::string wanted = prettyPrint(expected);
+        std::string got = prettyPrint(unparsed);
+        ADD_FAILURE() << "Expected:\n" << wanted << "\n"
+                      << "Actual:\n" << got
+#ifdef HAVE_CREATE_UNIFIED_DIFF
+                      << "\nDiff:\n" << generateDiff(wanted, got)
+#endif
+                      << "\n";
+    }
+}
+
+}; // end of isc::test namespace
+}; // end of isc namespace
+
+#endif // TEST_TO_ELEMENT_H