1 files changed, 94 insertions, 0 deletions
diff --git a/framework/src/onos/utils/misc/src/test/java/org/onlab/util/RetryingFunctionTest.java b/framework/src/onos/utils/misc/src/test/java/org/onlab/util/RetryingFunctionTest.java
new file mode 100644
index 00000000..4b08d2fc
--- /dev/null
+++ b/framework/src/onos/utils/misc/src/test/java/org/onlab/util/RetryingFunctionTest.java
@@ -0,0 +1,94 @@
+/*
+ * Copyright 2015 Open Networking Laboratory
+ *
+ * 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.
+ */
+package org.onlab.util;
+
+import org.junit.After;
+import org.junit.Before;
+import org.junit.Test;
+
+/**
+ * Unit tests for RetryingFunction.
+ *
+ */
+public class RetryingFunctionTest {
+
+    private int round;
+
+    @Before
+    public void setUp() {
+        round = 1;
+    }
+
+    @After
+    public void tearDown() {
+        round = 0;
+    }
+
+    @Test(expected = RetryableException.class)
+    public void testNoRetries() {
+        new RetryingFunction<>(this::succeedAfterOneFailure, RetryableException.class, 0, 10).apply(null);
+    }
+
+    @Test
+    public void testSuccessAfterOneRetry() {
+        new RetryingFunction<>(this::succeedAfterOneFailure, RetryableException.class, 1, 10).apply(null);
+    }
+
+    @Test(expected = RetryableException.class)
+    public void testFailureAfterOneRetry() {
+        new RetryingFunction<>(this::succeedAfterTwoFailures, RetryableException.class, 1, 10).apply(null);
+    }
+
+    @Test
+    public void testFailureAfterTwoRetries() {
+        new RetryingFunction<>(this::succeedAfterTwoFailures, RetryableException.class, 2, 10).apply(null);
+    }
+
+    @Test(expected = NonRetryableException.class)
+    public void testFailureWithNonRetryableFailure() {
+        new RetryingFunction<>(this::failCompletely, RetryableException.class, 2, 10).apply(null);
+    }
+
+    private String succeedAfterOneFailure(String input) {
+        if (round++ <= 1) {
+            throw new RetryableException();
+        } else {
+            return "pass";
+        }
+    }
+
+    private String succeedAfterTwoFailures(String input) {
+        if (round++ <= 2) {
+            throw new RetryableException();
+        } else {
+            return "pass";
+        }
+    }
+
+    private String failCompletely(String input) {
+        if (round++ <= 1) {
+            throw new NonRetryableException();
+        } else {
+            return "pass";
+        }
+    }
+
+    private class RetryableException extends RuntimeException {
+    }
+
+    private class NonRetryableException extends RuntimeException {
+    }
+}