New templatized linked_list collection

Also updated tests to work with memory changes

src/tests/linked_list.cpp

@@ -0,0 +1,123 @@
+#include <chrono>
+#include <iostream>
+#include <limits>
+#include <random>
+#include <vector>
+#include "kutil/linked_list.h"
+#include "catch.hpp"
+
+using namespace kutil;
+
+const int test_list_size = 100;
+
+struct unsortableT {
+	int value;
+};
+
+struct sortableT {
+	int value;
+	int compare(const sortableT *other) {
+		return value - other->value;
+	}
+};
+
+template <typename T>
+class ListVectorCompare :
+	public Catch::MatcherBase<std::vector<list_node<T>>>
+{
+public:
+	using item = list_node<T>;
+	using vector = std::vector<item>;
+
+	ListVectorCompare(const linked_list<T> &list, bool reversed) :
+		m_list(list), m_reverse(reversed) {}
+
+	virtual bool match (vector const& vec) const override
+	{
+		size_t index = m_reverse ? vec.size() - 1 : 0;
+		for (const T &i : m_list) {
+			if (&i != &vec[index]) return false;
+			index += m_reverse ? -1 : 1;
+		}
+		return true;
+	}
+
+	virtual std::string describe() const override
+	{
+		return "is the same as the given linked list";
+	}
+
+private:
+	const linked_list<T> &m_list;
+	bool m_reverse;
+};
+
+template <typename T>
+class IsSorted :
+	public Catch::MatcherBase<linked_list<T>>
+{
+public:
+	using item = list_node<T>;
+	using list = linked_list<T>;
+
+	IsSorted() {}
+
+	virtual bool match (list const& l) const override
+	{
+		int big = std::numeric_limits<int>::min();
+		for (const T &i : l) {
+			if (i.value < big) return false;
+			big = i.value;
+		}
+		return true;
+	}
+
+	virtual std::string describe() const override
+	{
+		return "is sorted";
+	}
+};
+
+template <typename T>
+ListVectorCompare<T> IsSameAsList(const linked_list<T> &list, bool reversed = false)
+{
+	return ListVectorCompare<T>(list, reversed);
+}
+
+TEST_CASE( "Linked list tests", "[containers list]" )
+{
+	using clock = std::chrono::system_clock;
+	unsigned seed = clock::now().time_since_epoch().count();
+	std::default_random_engine rng(seed);
+	std::uniform_int_distribution<int> gen(1, 1000);
+
+	linked_list<unsortableT> ulist;
+
+	std::vector<list_node<unsortableT>> unsortables(test_list_size);
+	for (auto &i : unsortables) {
+		i.value = gen(rng);
+		ulist.push_back(&i);
+	}
+	CHECK( ulist.length() == test_list_size );
+	CHECK_THAT( unsortables, IsSameAsList(ulist) );
+
+	linked_list<unsortableT> ulist_reversed;
+
+	for (auto &i : unsortables) {
+		i.remove();
+		ulist_reversed.push_front(&i);
+	}
+
+	CHECK( ulist_reversed.length() == test_list_size );
+	CHECK_THAT( unsortables, IsSameAsList(ulist_reversed, true) );
+
+	linked_list<sortableT> slist;
+
+	std::vector<list_node<sortableT>> sortables(test_list_size);
+	for (auto &i : sortables) {
+		i.value = gen(rng);
+		slist.sorted_insert(&i);
+	}
+	CHECK( slist.length() == test_list_size );
+	CHECK_THAT( slist, IsSorted<sortableT>() );
+}