1 files changed, 70 insertions, 0 deletions
diff --git a/junit4/src/main/java/org/junit/experimental/results/ResultMatchers.java b/junit4/src/main/java/org/junit/experimental/results/ResultMatchers.java
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+++ b/junit4/src/main/java/org/junit/experimental/results/ResultMatchers.java
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+package org.junit.experimental.results;
+
+import org.hamcrest.BaseMatcher;
+import org.hamcrest.Description;
+import org.hamcrest.Matcher;
+import org.junit.internal.matchers.TypeSafeMatcher;
+
+/**
+ * Matchers on a PrintableResult, to enable JUnit self-tests.
+ * For example:
+ * 
+ * <pre>
+ * 		assertThat(testResult(HasExpectedException.class), isSuccessful());
+ * </pre>
+ */
+public class ResultMatchers {
+	/**
+	 * Matches if the tests are all successful
+	 */
+	public static Matcher<PrintableResult> isSuccessful() {
+		return failureCountIs(0);
+	}
+
+	/**
+	 * Matches if there are {@code count} failures
+	 */
+	public static Matcher<PrintableResult> failureCountIs(final int count) {
+		return new TypeSafeMatcher<PrintableResult>() {
+			public void describeTo(Description description) {
+				description.appendText("has " + count + " failures");
+			}
+
+			@Override
+			public boolean matchesSafely(PrintableResult item) {
+				return item.failureCount() == count;
+			}
+		};
+	}
+	
+	/**
+	 * Matches if the result has exactly one failure, and it contains {@code string}
+	 */
+	public static Matcher<Object> hasSingleFailureContaining(final String string) {
+		return new BaseMatcher<Object>() {
+			public boolean matches(Object item) {
+				return item.toString().contains(string) && failureCountIs(1).matches(item);
+			}
+
+			public void describeTo(Description description) {
+				description.appendText("has single failure containing " + string);
+			}
+		};
+	}
+
+	/**
+	 * Matches if the result has one or more failures, and at least one of them
+	 * contains {@code string}
+	 */
+	public static Matcher<PrintableResult> hasFailureContaining(final String string) {
+		return new BaseMatcher<PrintableResult>() {
+			public boolean matches(Object item) {
+				return item.toString().contains(string);
+			}
+
+			public void describeTo(Description description) {
+				description.appendText("has failure containing " + string);
+			}
+		};
+	}
+}