Count tested devices after test operations

#[test]
fn t1() {
    let start = std::time::Instant::now();
    let val = Solution::count_tested_devices(vec![1, 1, 2, 1, 3]);
    let expected = 3;
    log_result!(val == expected, "t1", start, &expected, &val);
    assert_eq!(val, expected);
}

#[test]
fn t2() {
    let start = std::time::Instant::now();
    let val = Solution::count_tested_devices(vec![0, 1, 2]);
    let expected = 2;
    log_result!(val == expected, "t2", start, &expected, &val);
    assert_eq!(val, expected);
}

#[test]
fn t3() {
    let start = std::time::Instant::now();
    let val = Solution::count_tested_devices(vec![0, 0, 0]);
    let expected = 0;
    log_result!(val == expected, "t3", start, &expected, &val);
    assert_eq!(val, expected);
}

#[test]
fn t4() {
    let start = std::time::Instant::now();
    let val = Solution::count_tested_devices(vec![10, 10, 10]);
    let expected = 3;
    log_result!(val == expected, "t4", start, &expected, &val);
    assert_eq!(val, expected);
}

#[test]
fn t5() {
    let start = std::time::Instant::now();
    let val = Solution::count_tested_devices(vec![5]);
    let expected = 1;
    log_result!(val == expected, "t5", start, &expected, &val);
    assert_eq!(val, expected);
}

#[test]
fn t6() {
    let start = std::time::Instant::now();
    let val = Solution::count_tested_devices(vec![5, 5, 5, 5, 5]);
    let expected = 5;
    log_result!(val == expected, "t6", start, &expected, &val);
    assert_eq!(val, expected);
}