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 *  * terms of the Apache License, Version 2.0 which is available at
 *  * https://www.apache.org/licenses/LICENSE-2.0.
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 *  *  information regarding copyright ownership.
 *  * Unless required by applicable law or agreed to in writing, software
 *  * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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package org.eclipse.deeplearning4j.dl4jcore.datasets.iterator;

import org.deeplearning4j.BaseDL4JTest;
import org.deeplearning4j.datasets.iterator.SamplingDataSetIterator;
import org.deeplearning4j.datasets.iterator.impl.MnistDataSetIterator;
import org.junit.jupiter.api.Tag;
import org.junit.jupiter.api.Test;
import org.nd4j.common.tests.tags.NativeTag;
import org.nd4j.common.tests.tags.TagNames;
import org.nd4j.linalg.dataset.api.iterator.DataSetIterator;
import static org.junit.jupiter.api.Assertions.assertEquals;
import org.junit.jupiter.api.DisplayName;

/**
 * @author Adam Gibson
 */
@DisplayName("Sampling Test")
@NativeTag
@Tag(TagNames.FILE_IO)
@Tag(TagNames.NDARRAY_ETL)
class SamplingTest extends BaseDL4JTest {

    @Test
    @DisplayName("Test Sample")
    void testSample() throws Exception {
        DataSetIterator iter = new MnistDataSetIterator(10, 10);
        // batch size and total
        DataSetIterator sampling = new SamplingDataSetIterator(iter.next(), 10, 10);
        assertEquals(10, sampling.next().numExamples());
    }
}
