/*
* Copyright 2007 Google Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License"); you may not
* use this file except in compliance with the License. You may obtain a copy of
* the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
* License for the specific language governing permissions and limitations under
* the License.
*/
package com.google.test.metric.report.chart;
import static java.lang.Integer.MAX_VALUE;
import java.util.Arrays;
import junit.framework.TestCase;
import com.google.test.metric.report.chart.Histogram.Linear;
import com.google.test.metric.report.chart.Histogram.Logarithmic;
public class HistogramTest extends TestCase {
public void testSimpleBreakdown() throws Exception {
Histogram histogram = new Histogram(1, 1, 3, new Linear());
histogram.value(1);
histogram.value(1);
histogram.value(1);
histogram.value(2);
histogram.value(2);
histogram.value(3);
assertArrayEquals(array(3, 2, 1), histogram.getBins());
assertArrayEquals(array(30, 0, 0), histogram.getScaledBinRange(1, 2, 30));
assertArrayEquals(array(0, 20, 0), histogram.getScaledBinRange(2, 3, 30));
assertArrayEquals(array(0, 0, 10), histogram.getScaledBinRange(3, MAX_VALUE, 30));
}
private void assertArrayEquals(int[] expected, int[] actual) {
assertTrue(String.format("Expected %s was %s", Arrays.toString(expected),
Arrays.toString(actual)), Arrays.equals(expected, actual));
}
private void assertArrayEquals(String[] expected, String[] actual) {
assertTrue(String.format("Expected %s was %s", Arrays.toString(expected),
Arrays.toString(actual)), Arrays.equals(expected, actual));
}
public void testLogarithmicScaling() throws Exception {
Histogram histogram = new Histogram(1, 1, 3, new Logarithmic());
for (int i=0; i<100; i++) {
histogram.value(1);
}
for (int i=0; i<10; i++) {
histogram.value(2);
}
histogram.value(3);
assertArrayEquals(array(100, 10, 1), histogram.getBins());
assertArrayEquals(array(30, 0, 0), histogram.getScaledBinRange(1, 2, 30));
assertArrayEquals(array(0, 20, 0), histogram.getScaledBinRange(2, 3, 30));
assertArrayEquals(array(0, 0, 10), histogram.getScaledBinRange(3, MAX_VALUE, 30));
}
private int[] array(int... values) {
return values;
}
private String[] array(String... values) {
return values;
}
}