Github user joshelser commented on a diff in the pull request:
https://github.com/apache/accumulo/pull/260#discussion_r119896647
--- Diff:
iterator-test-harness/src/main/java/org/apache/accumulo/iteratortest/testcases/YieldingTestCase.java
---
@@ -0,0 +1,77 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements. See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to you 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.apache.accumulo.iteratortest.testcases;
+
+import org.apache.accumulo.core.data.Key;
+import org.apache.accumulo.core.data.Range;
+import org.apache.accumulo.core.data.Value;
+import org.apache.accumulo.core.iterators.SortedKeyValueIterator;
+import org.apache.accumulo.core.iterators.YieldCallback;
+import org.apache.accumulo.iteratortest.IteratorTestInput;
+import org.apache.accumulo.iteratortest.IteratorTestOutput;
+import org.apache.accumulo.iteratortest.IteratorTestUtil;
+import
org.apache.accumulo.iteratortest.environments.SimpleIteratorEnvironment;
+
+import java.io.IOException;
+import java.util.TreeMap;
+
+/**
+ * Test case that verifies that an iterator works correctly with the
yielding api. Note that most iterators do nothing in terms of yielding in which
case this
+ * merely tests that the iterator produces the correct output. If however
the iterator does override the yielding api, then this ensures that it works
correctly
+ * iff the iterator actually decides to yield. Nothing can force an
iterator to yield without knowing something about the internals of the iterator
being
+ * tested.
+ */
+public class YieldingTestCase extends OutputVerifyingTestCase {
--- End diff --
Thanks for writing this! Outside of the context of the review, I'm curious
to hear your thoughts on the usefulness of this structure. Aside from Dylan, i
think you're the only other person "brave" enough to dig in :)
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