MultiquadraticRadialBasisFunctionTest.java

/**
 * Copyright (C) 2009 - present by OpenGamma Inc. and the OpenGamma group of companies
 *
 * Please see distribution for license.
 */
package com.opengamma.analytics.math.interpolation;

import static org.testng.AssertJUnit.assertEquals;
import static org.testng.AssertJUnit.assertFalse;

import org.testng.annotations.Test;

import com.opengamma.util.test.TestGroup;

/**
 * Test.
 */
@Test(groups = TestGroup.UNIT)
public class MultiquadraticRadialBasisFunctionTest {
  private static final double X1 = 2.4;

  @Test
  public void test() {
    MultiquadraticRadialBasisFunction f = new MultiquadraticRadialBasisFunction(X1);
    MultiquadraticRadialBasisFunction other = new MultiquadraticRadialBasisFunction(X1);
    assertEquals(other, f);
    assertEquals(other.hashCode(), f.hashCode());
    f = new MultiquadraticRadialBasisFunction();
    other = new MultiquadraticRadialBasisFunction(1);
    assertEquals(other, f);
    other = new MultiquadraticRadialBasisFunction(X1);
    assertFalse(other.equals(f));
    for (int i = 0; i < 10; i++) {
      final double x = Math.random();
      assertEquals(f.evaluate(x), Math.sqrt(x * x + 1), 0);
      assertEquals(other.evaluate(x), Math.sqrt(x * x + X1 * X1), 0);
    }
  }
}