001 package org.junit.experimental.results;
002
003 import org.hamcrest.BaseMatcher;
004 import org.hamcrest.Description;
005 import org.hamcrest.Matcher;
006 import org.hamcrest.TypeSafeMatcher;
007
008 /**
009 * Matchers on a PrintableResult, to enable JUnit self-tests.
010 * For example:
011 *
012 * <pre>
013 * assertThat(testResult(HasExpectedException.class), isSuccessful());
014 * </pre>
015 */
016 public class ResultMatchers {
017 /**
018 * Matches if the tests are all successful
019 */
020 public static Matcher<PrintableResult> isSuccessful() {
021 return failureCountIs(0);
022 }
023
024 /**
025 * Matches if there are {@code count} failures
026 */
027 public static Matcher<PrintableResult> failureCountIs(final int count) {
028 return new TypeSafeMatcher<PrintableResult>() {
029 public void describeTo(Description description) {
030 description.appendText("has " + count + " failures");
031 }
032
033 @Override
034 public boolean matchesSafely(PrintableResult item) {
035 return item.failureCount() == count;
036 }
037 };
038 }
039
040 /**
041 * Matches if the result has exactly one failure, and it contains {@code string}
042 */
043 public static Matcher<Object> hasSingleFailureContaining(final String string) {
044 return new BaseMatcher<Object>() {
045 public boolean matches(Object item) {
046 return item.toString().contains(string) && failureCountIs(1).matches(item);
047 }
048
049 public void describeTo(Description description) {
050 description.appendText("has single failure containing " + string);
051 }
052 };
053 }
054
055 /**
056 * Matches if the result has one or more failures, and at least one of them
057 * contains {@code string}
058 */
059 public static Matcher<PrintableResult> hasFailureContaining(final String string) {
060 return new BaseMatcher<PrintableResult>() {
061 public boolean matches(Object item) {
062 return item.toString().contains(string);
063 }
064
065 public void describeTo(Description description) {
066 description.appendText("has failure containing " + string);
067 }
068 };
069 }
070 }