/*
 *  ******************************************************************************
 *  *
 *  *
 *  * This program and the accompanying materials are made available under the
 *  * terms of the Apache License, Version 2.0 which is available at
 *  * https://www.apache.org/licenses/LICENSE-2.0.
 *  *
 *  *  See the NOTICE file distributed with this work for additional
 *  *  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
 *  * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
 *  * License for the specific language governing permissions and limitations
 *  * under the License.
 *  *
 *  * SPDX-License-Identifier: Apache-2.0
 *  *****************************************************************************
 */

package org.eclipse.deeplearning4j.nd4j.linalg.api.iterator;

import lombok.val;
import org.junit.jupiter.api.Tag;
import org.junit.jupiter.api.Test;
import org.junit.jupiter.params.ParameterizedTest;
import org.junit.jupiter.params.provider.MethodSource;

import org.nd4j.common.tests.tags.NativeTag;
import org.nd4j.common.tests.tags.TagNames;
import org.nd4j.linalg.BaseNd4jTestWithBackends;
import org.nd4j.linalg.api.iter.NdIndexIterator;
import org.nd4j.linalg.factory.Nd4jBackend;

import static org.junit.jupiter.api.Assertions.assertArrayEquals;

/**
 * @author Adam Gibson
 */
@Tag(TagNames.JAVA_ONLY)
@NativeTag
public class NDIndexIteratorTest extends BaseNd4jTestWithBackends {


    @ParameterizedTest
    @MethodSource("org.nd4j.linalg.BaseNd4jTestWithBackends#configs")
    public void testIterate(Nd4jBackend backend) {
        val shapeIter = new NdIndexIterator(2, 2);
        val possibleSolutions = new long[][] {{0, 0}, {0, 1}, {1, 0}, {1, 1},};

        for (int i = 0; i < 4; i++) {
            assertArrayEquals(possibleSolutions[i], shapeIter.next());
        }


    }

    @Override
    public char ordering() {
        return 'f';
    }
}
