1 files changed, 55 insertions, 0 deletions
diff --git a/policy-core/src/test/java/org/onap/policy/drools/core/lock/TestingUtils.java b/policy-core/src/test/java/org/onap/policy/drools/core/lock/TestingUtils.java
new file mode 100644
index 00000000..17a11a09
--- /dev/null
+++ b/policy-core/src/test/java/org/onap/policy/drools/core/lock/TestingUtils.java
@@ -0,0 +1,55 @@
+/*
+ * ============LICENSE_START=======================================================
+ * ONAP
+ * ================================================================================
+ * Copyright (C) 2018 AT&T Intellectual Property. All rights reserved.
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ * 
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ * ============LICENSE_END=========================================================
+ */
+
+package org.onap.policy.drools.core.lock;
+
+public class TestingUtils {
+
+    /**
+     * Invokes a function that is expected to throw an exception.
+     * 
+     * @param clazz class of exception that is expected
+     * @param func function
+     * @return object
+     */
+    public static <T> T expectException(Class<T> clazz, VoidFunction func) {
+        try {
+            func.apply();
+            throw new AssertionError("missing exception");
+
+        } catch (Exception e) {
+            try {
+                return clazz.cast(e);
+
+            } catch (ClassCastException e2) {
+                throw new AssertionError("incorrect exception type", e2);
+            }
+        }
+    }
+
+    /**
+     * Void function that may throw an exception.
+     */
+    @FunctionalInterface
+    public static interface VoidFunction {
+
+        public void apply() throws Exception;
+    }
+}