clock: initial commit

cpp/clock/clock_test.cpp

@@ -0,0 +1,84 @@
+#include "clock.h"
+#define BOOST_TEST_MAIN
+#include <boost/test/unit_test.hpp>
+
+using namespace std;
+
+BOOST_AUTO_TEST_CASE(prints_the_hour)
+{
+    BOOST_REQUIRE_EQUAL("08:00", string(date_independent::clock::at(8)));
+    BOOST_REQUIRE_EQUAL("09:00", string(date_independent::clock::at(9)));
+}
+
+#if defined(EXERCISM_RUN_ALL_TESTS)
+BOOST_AUTO_TEST_CASE(prints_past_the_hour)
+{
+    BOOST_REQUIRE_EQUAL("11:09", string(date_independent::clock::at(11, 9)));
+    BOOST_REQUIRE_EQUAL("11:19", string(date_independent::clock::at(11, 19)));
+}
+
+BOOST_AUTO_TEST_CASE(can_add_minutes)
+{
+    const auto clock = date_independent::clock::at(10).plus(3);
+
+    BOOST_REQUIRE_EQUAL("10:03", string(clock));
+}
+
+BOOST_AUTO_TEST_CASE(can_add_over_an_hour)
+{
+    const auto clock = date_independent::clock::at(10).plus(61);
+
+    BOOST_REQUIRE_EQUAL("11:01", string(clock));
+}
+
+BOOST_AUTO_TEST_CASE(wraps_around_midnight)
+{
+    const auto clock = date_independent::clock::at(23, 59).plus(2);
+
+    BOOST_REQUIRE_EQUAL("00:01", string(clock));
+}
+
+BOOST_AUTO_TEST_CASE(can_subtract_minutes)
+{
+    const auto clock = date_independent::clock::at(10, 3).minus(3);
+
+    BOOST_REQUIRE_EQUAL("10:00", string(clock));
+}
+
+BOOST_AUTO_TEST_CASE(can_subtract_to_previous_hour)
+{
+    const auto clock = date_independent::clock::at(10, 3).minus(30);
+
+    BOOST_REQUIRE_EQUAL("09:33", string(clock));
+}
+
+BOOST_AUTO_TEST_CASE(can_subtract_over_an_hour)
+{
+    const auto clock = date_independent::clock::at(10, 3).minus(70);
+
+    BOOST_REQUIRE_EQUAL("08:53", string(clock));
+}
+
+BOOST_AUTO_TEST_CASE(can_know_if_its_equal_to_another_clock)
+{
+    const auto clock1 = date_independent::clock::at(10, 3);
+    const auto clock2 = date_independent::clock::at(10, 3);
+
+    BOOST_REQUIRE(clock1 == clock2);
+}
+
+BOOST_AUTO_TEST_CASE(can_know_if_its_not_equal_to_another_clock)
+{
+    const auto clock1 = date_independent::clock::at(10, 3);
+    const auto clock2 = date_independent::clock::at(10, 4);
+
+    BOOST_REQUIRE(clock1 != clock2);
+}
+
+BOOST_AUTO_TEST_CASE(wraps_around_midnight_backwards)
+{
+    const auto clock = date_independent::clock::at(0, 3).minus(4);
+
+    BOOST_REQUIRE_EQUAL("23:59", string(clock));
+}
+#endif