Add integration test for Verifier-rules using ErrorCollector example …

…from JUnit 4

This test would fail correctly if commented in so serves as documentation only.

#433

junit-jupiter-engine/src/test/java/org/junit/jupiter/engine/vintage/rulesupport/VerifierSupportForErrorCollectorFieldTests.java

@@ -0,0 +1,33 @@
+/*
+ * Copyright 2015-2016 the original author or authors.
+ *
+ * All rights reserved. This program and the accompanying materials are
+ * made available under the terms of the Eclipse Public License v1.0 which
+ * accompanies this distribution and is available at
+ *
+ * http://www.eclipse.org/legal/epl-v10.html
+ */
+
+package org.junit.jupiter.engine.vintage.rulesupport;
+
+import org.junit.Rule;
+import org.junit.jupiter.api.extension.ExtendWith;
+import org.junit.rules.ErrorCollector;
+
+@ExtendWith(VerifierSupport.class)
+public class VerifierSupportForErrorCollectorFieldTests {
+
+	@Rule
+	public ErrorCollector collector = new ErrorCollector();
+
+	// TODO: this test does expose the correct behavior
+	// - is there a way to formalize this in junit 5 without failing the test?
+	// the expected org.junit.internal.runners.model.MultipleFailureException is only thrown
+	// after the test method itself...
+	// @Test
+	void addingTwoThrowablesToErrorCollectorFailsLate() {
+		collector.addError(new Throwable("first thing went wrong"));
+		collector.addError(new Throwable("second thing went wrong"));
+	}
+
+}