fn process_square_case(input: u32, expected: u64) { assert_eq!(grains::square(input), expected); } #[test] fn one() { process_square_case(1, 1); } #[test] fn two() { process_square_case(2, 2); } #[test] fn three() { process_square_case(3, 4); } #[test] fn four() { process_square_case(4, 8); } #[test] fn sixteen() { process_square_case(16, 32_768); } #[test] fn thirty_two() { process_square_case(32, 2_147_483_648); } #[test] fn sixty_four() { process_square_case(64, 9_223_372_036_854_775_808); } #[test] #[should_panic(expected = "Square must be between 1 and 64")] fn square_0_raises_an_exception() { grains::square(0); } #[test] #[should_panic(expected = "Square must be between 1 and 64")] fn square_greater_than_64_raises_an_exception() { grains::square(65); } #[test] fn returns_the_total_number_of_grains_on_the_board() { assert_eq!(grains::total(), 18_446_744_073_709_551_615); }