/*
    * 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
    *
    *      https://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.
   */
  
  /*
   * This is not the original file distributed by the Apache Software Foundation
   * It has been modified by the Hipparchus project
   */
  
  package org.hipparchus.linear;
  
  import org.hipparchus.exception.LocalizedCoreFormats;
  import org.hipparchus.exception.MathRuntimeException;
  import org.hipparchus.linear.RealVector.Entry;
  import org.junit.jupiter.api.Test;
  
  import java.util.Iterator;
  
  import static org.junit.jupiter.api.Assertions.assertEquals;
  import static org.junit.jupiter.api.Assertions.assertThrows;
  import static org.junit.jupiter.api.Assertions.fail;
  
  /**
   * Tests for {@link RealVector}.
   */
  public class RealVectorTest extends RealVectorAbstractTest {
  
      @Override
      public RealVector create(final double[] data) {
          return new RealVectorTestImpl(data);
      }
  
      @Test
      @Override
      public void testAppendVector() {
          checkUnsupported(() -> super.testAppendVector());
      }
  
      @Test
      @Override
      public void testAppendScalar() {
          checkUnsupported(() -> super.testAppendScalar());
      }
  
      @Test
      @Override
      public void testGetSubVector() {
          checkUnsupported(() -> super.testGetSubVector());
      }
  
      @Test
      @Override
      public void testGetSubVectorInvalidIndex1() {
          assertThrows(UnsupportedOperationException.class, () -> {
              final int n = 10;
              create(new double[n]).getSubVector(-1, 2);
          });
      }
  
      @Test
      @Override
      public void testGetSubVectorInvalidIndex2() {
          assertThrows(UnsupportedOperationException.class, () -> {
              final int n = 10;
              create(new double[n]).getSubVector(2, 2);
          });
      }
  
      @Test
      @Override
      public void testGetSubVectorInvalidIndex3() {
          assertThrows(UnsupportedOperationException.class, () -> {
              final int n = 10;
              create(new double[n]).getSubVector(0, 2);
          });
      }
  
      @Test
      @Override
      public void testGetSubVectorInvalidIndex4() {
          assertThrows(UnsupportedOperationException.class, () -> {
              final int n = 10;
              create(new double[n]).getSubVector(3, 2);
          });
      }
  
     @Test
     @Override
     public void testSetSubVectorSameType() {
         checkUnsupported(() -> super.testSetSubVectorSameType());
     }
 
     @Test
     @Override
     public void testSetSubVectorMixedType() {
         checkUnsupported(() -> super.testSetSubVectorMixedType());
     }
 
     @Test
     @Override
     public void testSetSubVectorInvalidIndex1() {
         assertThrows(UnsupportedOperationException.class, () -> {
             create(new double[10]).setSubVector(-1, create(new double[2]));
         });
     }
 
     @Test
     @Override
     public void testSetSubVectorInvalidIndex2() {
         assertThrows(UnsupportedOperationException.class, () -> {
             create(new double[10]).setSubVector(10, create(new double[2]));
         });
     }
 
     @Test
     @Override
     public void testSetSubVectorInvalidIndex3() {
         assertThrows(UnsupportedOperationException.class, () -> {
             create(new double[10]).setSubVector(9, create(new double[2]));
         });
     }
 
     @Test
     @Override
     public void testIsNaN() {
         checkUnsupported(() -> super.testIsNaN());
     }
 
     @Test
     @Override
     public void testIsInfinite() {
         checkUnsupported(() -> super.testIsInfinite());
     }
 
     @Test
     @Override
     public void testEbeMultiplySameType() {
         checkUnsupported(() -> super.testEbeMultiplySameType());
     }
 
     @Test
     @Override
     public void testEbeMultiplyMixedTypes() {
         checkUnsupported(() -> super.testEbeMultiplyMixedTypes());
     }
 
     @Test
     @Override
     public void testEbeMultiplyDimensionMismatch() {
         assertThrows(UnsupportedOperationException.class, () -> {
             doTestEbeBinaryOperationDimensionMismatch(BinaryOperation.MUL);
         });
     }
 
     @Test
     @Override
     public void testEbeDivideSameType() {
         checkUnsupported(() -> super.testEbeDivideSameType());
     }
 
     @Test
     @Override
     public void testEbeDivideMixedTypes() {
         checkUnsupported(() -> super.testEbeDivideMixedTypes());
     }
 
     @Test
     @Override
     public void testEbeDivideDimensionMismatch() {
         assertThrows(UnsupportedOperationException.class, () -> {
             doTestEbeBinaryOperationDimensionMismatch(BinaryOperation.DIV);
         });
     }
 
     @Test
     void testSparseIterator() {
         /*
          * For non-default values, use x + 1, x + 2, etc... to make sure that
          * these values are really different from x.
          */
         final double x = getPreferredEntryValue();
         final double[] data = {
             x, x + 1d, x, x, x + 2d, x + 3d, x + 4d, x, x, x, x + 5d, x + 6d, x
         };
 
         RealVector v = create(data);
         Entry e;
         int i = 0;
         final double[] nonDefault = {
             x + 1d, x + 2d, x + 3d, x + 4d, x + 5d, x + 6d
         };
         for (Iterator<Entry> it = v.sparseIterator(); it.hasNext(); i++) {
             e = it.next();
             assertEquals(nonDefault[i], e.getValue(), 0);
         }
         double [] onlyOne = {x, x + 1d, x};
         v = create(onlyOne);
         for(Iterator<Entry> it = v.sparseIterator(); it.hasNext(); ) {
             e = it.next();
             assertEquals(onlyOne[1], e.getValue(), 0);
         }
     }
 
     @Test
     @Override
     public void testSerial() {
         checkUnsupported(() -> super.testSerial());
     }
 
     @Test
     @Override
     public void testEquals() {
         checkUnsupported(() -> super.testEquals());
     }
 
     interface Thunk {
         void call();
     }
 
     private void checkUnsupported(final Thunk t) {
         try {
             t.call();
             fail("an exception should have been thrown");
         } catch (MathRuntimeException mre) {
             assertEquals(LocalizedCoreFormats.UNSUPPORTED_OPERATION, mre.getSpecifier());
         } catch (UnsupportedOperationException uoe) {
             // expected
         }
     }
 
 }