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package cz.crcs.ectester.reader.test;
import cz.crcs.ectester.common.test.Result;
import cz.crcs.ectester.common.test.SimpleTest;
import cz.crcs.ectester.common.test.TestCallback;
import cz.crcs.ectester.common.test.TestException;
import cz.crcs.ectester.reader.command.Command;
import java.util.Arrays;
/**
* @author Jan Jancar johny@neuromancer.sk
*/
public class PerformanceTest extends SimpleTest<CommandTestable> {
private long[] times;
private long mean;
private long median;
private long mode;
private int count;
private PerformanceTest(CommandTestable testable, int count) {
super(testable, new TestCallback<CommandTestable>() {
@Override
public Result apply(CommandTestable testable) {
return new Result(Result.Value.SUCCESS);
}
});
this.count = count;
}
public static PerformanceTest repeat(Command cmd, int count) {
return new PerformanceTest(new CommandTestable(cmd), count);
}
@Override
public String getDescription() {
return String.format("Mean = %d ns, Median = %d ns, Mode = %d ns", mean, median, mode);
}
@Override
public void run() throws TestException {
if (hasRun)
return;
times = new long[count];
for (int i = 0; i < count; ++i) {
testable.run();
times[i] = testable.getResponse().getDuration();
testable.reset();
}
mean = Arrays.stream(times).sum() / count;
long[] sorted = times.clone();
Arrays.sort(sorted);
if (count % 2 == 0) {
median = (sorted[(count / 2) - 1] + sorted[count / 2]) / 2;
} else {
median = sorted[count / 2];
}
long max_occurences = 0;
int i = 0;
while (i < count) {
long current_value = sorted[i];
long current_occurences = 0;
while (i < count && sorted[i] == current_value) {
i++;
current_occurences++;
}
if (current_occurences > max_occurences) {
max_occurences = current_occurences;
mode = current_value;
}
}
hasRun = true;
result = callback.apply(testable);
}
public long getCount() {
return count;
}
public Command getCommand() {
return testable.getCommand();
}
public long[] getTimes() {
return times;
}
public long getMean() {
return mean;
}
public long getMedian() {
return median;
}
public long getMode() {
return mode;
}
}
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