001    package org.junit.experimental.results;
002    
003    import java.io.ByteArrayOutputStream;
004    import java.io.PrintStream;
005    import java.util.List;
006    
007    import org.junit.internal.TextListener;
008    import org.junit.runner.JUnitCore;
009    import org.junit.runner.Request;
010    import org.junit.runner.Result;
011    import org.junit.runner.notification.Failure;
012    
013    /**
014     * A test result that prints nicely in error messages.
015     * This is only intended to be used in JUnit self-tests.
016     * For example:
017     *
018     * <pre>
019     *    assertThat(testResult(HasExpectedException.class), isSuccessful());
020     * </pre>
021     */
022    public class PrintableResult {
023        private Result result;
024    
025        /**
026         * The result of running JUnit on {@code type}
027         */
028        public static PrintableResult testResult(Class<?> type) {
029            return testResult(Request.aClass(type));
030        }
031    
032        /**
033         * The result of running JUnit on Request {@code request}
034         */
035        public static PrintableResult testResult(Request request) {
036            return new PrintableResult(new JUnitCore().run(request));
037        }
038    
039        /**
040         * A result that includes the given {@code failures}
041         */
042        public PrintableResult(List<Failure> failures) {
043            this(new FailureList(failures).result());
044        }
045    
046        private PrintableResult(Result result) {
047            this.result = result;
048        }
049    
050        /**
051         * Returns the number of failures in this result.
052         */
053        public int failureCount() {
054            return result.getFailures().size();
055        }
056    
057        /**
058         * Returns the failures in this result.
059         *
060         * @since 4.13
061         */
062        public List<Failure> failures() {
063            return result.getFailures();
064        }
065    
066        @Override
067        public String toString() {
068            ByteArrayOutputStream stream = new ByteArrayOutputStream();
069            new TextListener(new PrintStream(stream)).testRunFinished(result);
070            return stream.toString();
071        }
072    }