testutils: Allow asserting maps/hashes

tests/testutils.h

@@ -189,6 +189,15 @@ template <typename T> AsHexNumber<T> asHexNumber(const T &value)
 #define TESTUTILS_ASSERT_EXEC(args) CPPUNIT_ASSERT_EQUAL(0, execApp(args, stdout, stderr))
 #endif
 
+/*!
+ * \brief Allows printing pairs so key/values of maps/hashes can be asserted using CPPUNIT_ASSERT_EQUAL.
+ */
+template <typename Pair, Traits::EnableIf<Traits::IsSpecializationOf<Pair, std::pair>>...>
+inline std::ostream &operator<<(std::ostream &out, const Pair &pair)
+{
+    return out << "key: " << pair.first << "; value: " << pair.second << '\n';
+}
+
 /*!
  * \brief Allows printing iteratable objects so those can be asserted using CPPUNIT_ASSERT_EQUAL.
  */