First bad version

#[test]
fn t1() {
    let start = std::time::Instant::now();
    let sol = Solution { bad: 4 };
    let val = sol.first_bad_version(5);
    let expected = 4;
    log_result!(val == expected, "t1", start, &expected, &val);
    assert_eq!(val, expected);
}

#[test]
fn t2() {
    let start = std::time::Instant::now();
    let sol = Solution { bad: 1 };
    let val = sol.first_bad_version(1);
    let expected = 1;
    log_result!(val == expected, "t2", start, &expected, &val);
    assert_eq!(val, expected);
}

#[test]
fn t3() {
    let start = std::time::Instant::now();
    let sol = Solution { bad: 1 };
    let val = sol.first_bad_version(2);
    let expected = 1;
    log_result!(val == expected, "t3", start, &expected, &val);
    assert_eq!(val, expected);
}

#[test]
fn t4() {
    let start = std::time::Instant::now();
    let sol = Solution { bad: 2 };
    let val = sol.first_bad_version(2);
    let expected = 2;
    log_result!(val == expected, "t4", start, &expected, &val);
    assert_eq!(val, expected);
}

#[test]
fn t5() {
    let start = std::time::Instant::now();
    let sol = Solution { bad: 1702766719 };
    let val = sol.first_bad_version(2126753390);
    let expected = 1702766719;
    log_result!(val == expected, "t5", start, &expected, &val);
    assert_eq!(val, expected);
}