#include "catch.hpp"

#include <history.h>

using namespace newsbeuter;

TEST_CASE("History can be iterated on in any direction", "[history]") {
	history h;

	SECTION("Empty history returns nothing") {
		REQUIRE(h.prev() == "");
		REQUIRE(h.prev() == "");
		REQUIRE(h.next() == "");
		REQUIRE(h.next() == "");

		SECTION("One line in history") {
			h.add_line("testline");
			REQUIRE(h.prev() == "testline");
			REQUIRE(h.prev() == "testline");
			REQUIRE(h.next() == "testline");
			REQUIRE(h.next() == "");

			SECTION("Two lines in history") {
				h.add_line("foobar");
				REQUIRE(h.prev() == "foobar");
				REQUIRE(h.prev() == "testline");
				REQUIRE(h.next() == "testline");
				REQUIRE(h.prev() == "testline");
				REQUIRE(h.next() == "testline");
				REQUIRE(h.next() == "foobar");
				REQUIRE(h.next() == "");
				REQUIRE(h.next() == "");
			}
		}
	}
}