# RepeatRule.java

    /*
     * Copyright 2014 Paul Merlin.
     *
     * 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.qi4j.test.util;

    import org.junit.rules.TestRule;
    import org.junit.runner.Description;
    import org.junit.runners.model.Statement;

    /**
     * JUnit Rule to run tests repeatedly.
     *
     * <p>To repeat a complete test class:</p>
     * <pre>@ClassRule public static final RepeatRule REPEAT = new RepeatRule( 10 );</pre>
     *
     * <p>To repeat each test on the same test class instance:</p>
     * <pre>@Rule public final RepeatRule repeat = new RepeatRule( 10 );</pre>
     */
    public class RepeatRule
        implements TestRule
    {
        private final int count;

        public RepeatRule( int count )
        {
            this.count = count;
        }

        @Override
        public Statement apply( final Statement base, Description description )
        {
            return new Statement()
            {
                @Override
                public void evaluate()
                    throws Throwable
                {
                    for( int repeat = 0; repeat < count; repeat++ )
                    {
                        base.evaluate();
                    }
                }
            };
        }

    }