@Test
public void putTest() {

    final String results[] = {
            "Rolling Average: Size: 1/3 Average: 1.0    0:1.0 1:0.0 2:0.0 ",
            "Rolling Average: Size: 2/3 Average: 1.5    0:1.0 1:2.0 2:0.0 ",
            "Rolling Average: Size: 3/3 Average: 2.0    0:1.0 1:2.0 2:3.0 ",
            "Rolling Average: Size: 3/3 Average: 3.0    0:4.0 1:2.0 2:3.0 ",
            "Rolling Average: Size: 3/3 Average: 4.0    0:4.0 1:5.0 2:3.0 ",
            "Rolling Average: Size: 3/3 Average: 5.0    0:4.0 1:5.0 2:6.0 ",
            "Rolling Average: Size: 3/3 Average: 6.0    0:7.0 1:5.0 2:6.0 ",
            "Rolling Average: Size: 3/3 Average: 7.0    0:7.0 1:8.0 2:6.0 ",
            "Rolling Average: Size: 3/3 Average: 8.0    0:7.0 1:8.0 2:9.0 ",
            "Rolling Average: Size: 3/3 Average: 9.0    0:10.0 1:8.0 2:9.0 "
    };
    final RollingAverage avg1 = new RollingAverage(3);
    for (int i = 1; i <= 10; i++) {
        avg1.put(i);
        assertWithMessage("avg " + i).that(avg1.toS()).isEqualTo(results[i - 1]);
    }
}