iterator-test-harness/src/main/java/org/apache/accumulo/iteratortest/testcases/InstantiationTestCase.java

/*
 * 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.Value;
import org.apache.accumulo.core.iterators.SortedKeyValueIterator;
import org.apache.accumulo.iteratortest.IteratorTestInput;
import org.apache.accumulo.iteratortest.IteratorTestOutput;
import org.apache.accumulo.iteratortest.IteratorTestOutput.TestOutcome;

/**
 * TestCase to assert that an Iterator has a no-args constructor.
 */
public class InstantiationTestCase implements IteratorTestCase {

  @Override
  public IteratorTestOutput test(IteratorTestInput testInput) {
    Class<? extends SortedKeyValueIterator<Key,Value>> clz = testInput.getIteratorClass();

    try {
      // We should be able to instantiate the Iterator given the Class
      @SuppressWarnings("unused")
      SortedKeyValueIterator<Key,Value> iter = clz.newInstance();
    } catch (Exception e) {
      return new IteratorTestOutput(e);
    }

    return new IteratorTestOutput(TestOutcome.PASSED);
  }

  @Override
  public boolean verify(IteratorTestOutput expected, IteratorTestOutput actual) {
    // Ignore what the user provided as expected output, just check that we instantiated the
    // iterator successfully.
    return actual.getTestOutcome() == TestOutcome.PASSED;
  }

}