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JUnit is a regression testing framework written by Erich Gamma and Kent Beck. It is used by the developer who implements unit tests in Java.

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/**
 * 
 */
package org.junit.internal.builders;

import org.junit.internal.runners.SuiteMethod;
import org.junit.runner.Runner;
import org.junit.runners.model.RunnerBuilder;

public class SuiteMethodBuilder extends RunnerBuilder {
	@Override
	public Runner runnerForClass(Class each) throws Throwable {
		if (hasSuiteMethod(each))
			return new SuiteMethod(each);
		return null;
	}

	public boolean hasSuiteMethod(Class testClass) {
		try {
			testClass.getMethod("suite");
		} catch (NoSuchMethodException e) {
			return false;
		}
		return true;
	}
}