Find the winning player in coin game

#[test]
fn test_even_turns() {
    let start = std::time::Instant::now();
    let val = Solution::winning_player(3, 12);
    let expected = "Alice".to_string();
    log_result!(val == expected, "test_even_turns", start, &expected, &val);
    assert_eq!(val, expected);
}

#[test]
fn test_example1() {
    let start = std::time::Instant::now();
    let val = Solution::winning_player(2, 7);
    let expected = "Alice".to_string();
    log_result!(val == expected, "test_example1", start, &expected, &val);
    assert_eq!(val, expected);
}

#[test]
fn test_example2() {
    let start = std::time::Instant::now();
    let val = Solution::winning_player(4, 11);
    let expected = "Bob".to_string();
    log_result!(val == expected, "test_example2", start, &expected, &val);
    assert_eq!(val, expected);
}

#[test]
fn test_large_x() {
    let start = std::time::Instant::now();
    let val = Solution::winning_player(100, 4);
    let expected = "Alice".to_string();
    log_result!(val == expected, "test_large_x", start, &expected, &val);
    assert_eq!(val, expected);
}

#[test]
fn test_large_y() {
    let start = std::time::Instant::now();
    let val = Solution::winning_player(2, 100);
    let expected = "Bob".to_string();
    log_result!(val == expected, "test_large_y", start, &expected, &val);
    assert_eq!(val, expected);
}

#[test]
fn test_one_turn() {
    let start = std::time::Instant::now();
    let val = Solution::winning_player(1, 4);
    let expected = "Alice".to_string();
    log_result!(val == expected, "test_one_turn", start, &expected, &val);
    assert_eq!(val, expected);
}

#[test]
fn test_zero_turns() {
    let start = std::time::Instant::now();
    let val = Solution::winning_player(1, 3);
    let expected = "Bob".to_string();
    log_result!(val == expected, "test_zero_turns", start, &expected, &val);
    assert_eq!(val, expected);
}