Add a test that triggers an InitializationError in Request.classes(...)

src/test/java/org/junit/runner/RequestTest.java

@@ -0,0 +1,63 @@
+package org.junit.runner;
+
+import static org.hamcrest.MatcherAssert.assertThat;
+import static org.hamcrest.core.IsEqual.equalTo;
+
+import java.util.ArrayList;
+import java.util.List;
+
+import org.junit.Test;
+import org.junit.runner.notification.Failure;
+import org.junit.runner.notification.RunListener;
+import org.junit.runner.notification.RunNotifier;
+import org.junit.runners.model.InitializationError;
+import org.junit.runners.model.RunnerBuilder;
+
+public class RequestTest {
+
+    @Test
+    public void shouldReportFailureWhenSuiteCannotBeInitialized() {
+        RunNotifier notifier = new RunNotifier();
+        final FailureRunListener runListener = new FailureRunListener();
+        notifier.addListener(runListener);
+
+        Request.classes(new FailingComputer(), FooTest.class, BarTest.class)
+               .getRunner()
+               .run(notifier);
+
+        assertThat("There should be exactly one failure for the failed suite and not one for each test class",
+                   runListener.getFailures().size(), equalTo(1));
+    }
+
+    private static class FailingComputer extends Computer {
+
+        @Override
+        public Runner getSuite(RunnerBuilder builder, Class<?>[] classes)
+                throws InitializationError {
+            throw new InitializationError(new IllegalArgumentException());
+        }
+
+    }
+
+    private static class FailureRunListener extends RunListener {
+
+        private List<Failure> failures = new ArrayList<Failure>();
+
+        @Override
+        public void testFailure(Failure failure) throws Exception {
+            failures.add(failure);
+        }
+
+        public List<? extends Failure> getFailures() {
+            return failures;
+        }
+
+    }
+
+    private static class FooTest {
+    }
+
+    private static class BarTest {
+    }
+
+}