/*
    * 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.commons.math4.legacy.ode.nonstiff;
  
  
  import org.apache.commons.math4.legacy.core.Field;
  import org.apache.commons.math4.legacy.core.RealFieldElement;
  
  public class EulerFieldIntegratorTest extends RungeKuttaFieldIntegratorAbstractTest {
  
      @Override
      protected <T extends RealFieldElement<T>> RungeKuttaFieldIntegrator<T>
      createIntegrator(Field<T> field, T step) {
          return new EulerFieldIntegrator<>(field, step);
      }
  
      @Override
      public void testNonFieldIntegratorConsistency() {
          doTestNonFieldIntegratorConsistency(Decimal64Field.getInstance());
      }
  
      @Override
      public void testMissedEndEvent() {
          doTestMissedEndEvent(Decimal64Field.getInstance(), 1.0e-15, 6.0e-5);
      }
  
      @Override
      public void testSanityChecks() {
          doTestSanityChecks(Decimal64Field.getInstance());
      }
  
      @Override
      public void testDecreasingSteps() {
          doTestDecreasingSteps(Decimal64Field.getInstance(), 1.0, 1.5, 1.0e-10);
      }
  
      @Override
      public void testSmallStep() {
          doTestSmallStep(Decimal64Field.getInstance(), 2.0e-4, 1.0e-3, 1.0e-12, "Euler");
      }
  
      @Override
      public void testBigStep() {
          doTestBigStep(Decimal64Field.getInstance(), 0.01, 0.2, 1.0e-12, "Euler");
      }
  
      @Override
      public void testBackward() {
          doTestBackward(Decimal64Field.getInstance(),0.45, 0.45, 1.0e-12, "Euler");
      }
  
      @Override
      public void testKepler() {
          // Euler integrator is clearly not able to solve this problem
          doTestKepler(Decimal64Field.getInstance(), 881.176, 0.001);
      }
  
      @Override
      public void testStepSize() {
          doTestStepSize(Decimal64Field.getInstance(), 1.0e-12);
      }
  
      @Override
      public void testSingleStep() {
          doTestSingleStep(Decimal64Field.getInstance(), 0.21);
      }
  
      @Override
      public void testTooLargeFirstStep() {
          doTestTooLargeFirstStep(Decimal64Field.getInstance());
      }
  
      @Override
      public void testUnstableDerivative() {
          doTestUnstableDerivative(Decimal64Field.getInstance(), 1.0e-12);
      }
  
      @Override
      public void testDerivativesConsistency() {
          doTestDerivativesConsistency(Decimal64Field.getInstance(), 1.0e-10);
      }
  
      @Override
      public void testPartialDerivatives() {
         doTestPartialDerivatives(0.085, new double[] { 0.47, 0.13, 0.019, 0.019, 0.13 });
     }
 }