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      1 package org.junit.experimental.results;
      2 
      3 import java.io.ByteArrayOutputStream;
      4 import java.io.PrintStream;
      5 import java.util.List;
      6 
      7 import org.junit.internal.TextListener;
      8 import org.junit.runner.JUnitCore;
      9 import org.junit.runner.Request;
     10 import org.junit.runner.Result;
     11 import org.junit.runner.notification.Failure;
     12 
     13 /**
     14  * A test result that prints nicely in error messages.
     15  * This is only intended to be used in JUnit self-tests.
     16  * For example:
     17  *
     18  * <pre>
     19  *    assertThat(testResult(HasExpectedException.class), isSuccessful());
     20  * </pre>
     21  */
     22 public class PrintableResult {
     23 	/**
     24 	 * The result of running JUnit on {@code type}
     25 	 */
     26 	public static PrintableResult testResult(Class<?> type) {
     27 		return testResult(Request.aClass(type));
     28 	}
     29 
     30 	/**
     31 	 * The result of running JUnit on Request {@code request}
     32 	 */
     33 	public static PrintableResult testResult(Request request) {
     34 		return new PrintableResult(new JUnitCore().run(request));
     35 	}
     36 
     37 	private Result result;
     38 
     39 	/**
     40 	 * A result that includes the given {@code failures}
     41 	 */
     42 	public PrintableResult(List<Failure> failures) {
     43 		this(new FailureList(failures).result());
     44 	}
     45 
     46 	private PrintableResult(Result result) {
     47 		this.result = result;
     48 	}
     49 
     50 	@Override
     51 	public String toString() {
     52 		ByteArrayOutputStream stream = new ByteArrayOutputStream();
     53 		new TextListener(new PrintStream(stream)).testRunFinished(result);
     54 		return stream.toString();
     55 	}
     56 
     57 	/**
     58 	 * Returns the number of failures in this result.
     59 	 */
     60 	public int failureCount() {
     61 		return result.getFailures().size();
     62 	}
     63 }