queen-attack: initial commit

cpp/queen-attack/queen_attack_test.cpp

@@ -0,0 +1,102 @@
+#include "queen_attack.h"
+#define BOOST_TEST_MAIN
+#include <boost/test/unit_test.hpp>
+#include "require_equal_containers.h"
+
+BOOST_AUTO_TEST_CASE(queens_in_default_positions)
+{
+    const queen_attack::chess_board board;
+
+    BOOST_REQUIRE_EQUAL(std::make_pair(0, 3), board.white());
+    BOOST_REQUIRE_EQUAL(std::make_pair(7, 3), board.black());
+}
+
+#if defined(EXERCISM_RUN_ALL_TESTS)
+BOOST_AUTO_TEST_CASE(initialized_with_specific_positions)
+{
+    const auto white = std::make_pair(3, 7);
+    const auto black = std::make_pair(6, 1);
+    const queen_attack::chess_board board{white, black};
+
+    BOOST_REQUIRE_EQUAL(white, board.white());
+    BOOST_REQUIRE_EQUAL(black, board.black());
+}
+
+BOOST_AUTO_TEST_CASE(queen_positions_must_be_distinct)
+{
+    const auto pos = std::make_pair(3, 7);
+    BOOST_REQUIRE_THROW((queen_attack::chess_board{pos, pos}), std::domain_error);
+}
+
+BOOST_AUTO_TEST_CASE(string_representation)
+{
+    const queen_attack::chess_board board{std::make_pair(2, 4), std::make_pair(6, 6)};
+
+    const std::string expected{
+        "_ _ _ _ _ _ _ _\n"
+        "_ _ _ _ _ _ _ _\n"
+        "_ _ _ _ W _ _ _\n"
+        "_ _ _ _ _ _ _ _\n"
+        "_ _ _ _ _ _ _ _\n"
+        "_ _ _ _ _ _ _ _\n"
+        "_ _ _ _ _ _ B _\n"
+        "_ _ _ _ _ _ _ _\n"};
+    BOOST_REQUIRE_EQUAL(expected, static_cast<std::string>(board));
+}
+
+BOOST_AUTO_TEST_CASE(queens_cannot_attack)
+{
+    const queen_attack::chess_board board{std::make_pair(2, 3), std::make_pair(4, 7)};
+
+    BOOST_REQUIRE(!board.can_attack());
+}
+
+BOOST_AUTO_TEST_CASE(queens_can_attack_when_they_are_on_the_same_row)
+{
+    const queen_attack::chess_board board{std::make_pair(2, 4), std::make_pair(2, 7)};
+
+    BOOST_REQUIRE(board.can_attack());
+}
+
+BOOST_AUTO_TEST_CASE(queens_can_attack_when_they_are_on_the_same_column)
+{
+    const queen_attack::chess_board board{std::make_pair(5, 4), std::make_pair(2, 4)};
+
+    BOOST_REQUIRE(board.can_attack());
+}
+
+BOOST_AUTO_TEST_CASE(queens_can_attack_diagonally)
+{
+    const queen_attack::chess_board board{std::make_pair(1, 1), std::make_pair(6, 6)};
+
+    BOOST_REQUIRE(board.can_attack());
+}
+
+BOOST_AUTO_TEST_CASE(queens_can_attack_another_diagonally)
+{
+    const queen_attack::chess_board board{std::make_pair(0, 6), std::make_pair(1, 7)};
+
+    BOOST_REQUIRE(board.can_attack());
+}
+
+BOOST_AUTO_TEST_CASE(queens_can_attack_yet_another_diagonally)
+{
+    const queen_attack::chess_board board{std::make_pair(4, 1), std::make_pair(6, 3)};
+
+    BOOST_REQUIRE(board.can_attack());
+}
+
+BOOST_AUTO_TEST_CASE(queens_can_attack_on_the_nw_so_diagonal)
+{
+    const queen_attack::chess_board board{std::make_pair(1, 6), std::make_pair(6, 1)};
+
+    BOOST_REQUIRE(board.can_attack());
+}
+
+BOOST_AUTO_TEST_CASE(queens_cannot_attack_if_not_on_same_row_column_or_diagonal)
+{
+    const queen_attack::chess_board board{std::make_pair(1, 1), std::make_pair(3, 7)};
+
+    BOOST_REQUIRE(!board.can_attack());
+}
+#endif