package com.gradescope.hw4;
import static org.junit.Assert.*;

import org.junit.Test;


public class ComplexTest {
  
  double EPSILON = 0.0001;

  @Test
  public void Complex2Args() {
    Complex c = new Complex(42.0, 60.0);
    assertEquals( c.getReal(), 42.0, EPSILON );
    assertEquals( c.getImaginary(), 60.0, EPSILON );
  }
  
  @Test
  public void Complex0Args() {
    Complex c = new Complex();
    assertEquals( c.getReal(), 0.0, EPSILON );
    assertEquals( c.getImaginary(), 0.0, EPSILON );
  }
  
  @Test
  public void add1() {
    Complex c1 = new Complex(2.0,3.0);
    Complex c2 = new Complex(1.0,1.0);
    Complex c = c1.add(c2);
    assertEquals( c.getReal(), 3.0, EPSILON );
    assertEquals( c.getImaginary(), 4.0, EPSILON );
    assertEquals( c1, new Complex(2.0,3.0) );
    assertEquals( c2, new Complex(1.0,1.0) );
  }
  
  @Test
  public void addDest1() {
    Complex c1 = new Complex(2.0,3.0);
    Complex c2 = new Complex(1.0,1.0);
    c1.addDest(c2);
    assertEquals( c1, new Complex(3.0, 4.0) );
    assertEquals( c1.getReal(), 3.0, EPSILON );
    assertEquals( c1.getImaginary(), 4.0, EPSILON );
    assertEquals( c2, new Complex(1.0,1.0) );
  }
  
  @Test
  public void negate1() {
    Complex c1 = new Complex(2.0,3.0);
    Complex c2 = new Complex(-2.0,-3.0);
    assertEquals( c2, c1.negate() ); // uses c2.equals(...)
  }
  
  @Test
  public void negateDest1() {
    Complex c1 = new Complex(2.0,3.0);
    Complex c2 = new Complex(-2.0,-3.0);
    c1.negateDest();
    assertEquals( c2, c1 ); // uses c2.equals(...)
  }
  
  @Test
  public void conjugate1() {
    Complex c1 = new Complex(2.0,3.0);
    Complex c2 = new Complex(2.0,-3.0);
    assertEquals( c2, c1.conjugate() ); // uses c2.equals(...)
  }
  
  @Test
  public void conjugateDest1() {
    Complex c1 = new Complex(2.0,3.0);
    Complex c2 = new Complex(2.0,-3.0);
    c1.conjugateDest();
    assertEquals( c2, c1 ); // uses c2.equals(...)
  }
  
  @Test
  public void multiply1() {
    Complex c1 = new Complex(14.64,0.48);
    Complex c2 = new Complex(3.0,4.0);
    Complex c3 = new Complex(42.0,60.0);
    assertEquals( c3, c1.multiply(c2) ); // uses c3.equals(...)
  }

  @Test
  public void magnitude1() {
    Complex c2 = new Complex(3.0,4.0);
    assertEquals( c2.magnitude(), 5.0, EPSILON );
  }
  
  @Test
  public void divide1() {
    Complex c1 = new Complex(42.0,60.0);
    Complex c2 = new Complex(14.64,0.48);
    Complex c3 = new Complex(3.0,4.0);
    assertEquals( c3, c1.divide(c2) ); // uses c3.equals(...)
  }
  
  @Test
  public void divide2() {
    Complex c1 = new Complex(42.0,60.0);
    Complex c2 = new Complex(0, 0);
    Complex c3 = new Complex(Double.NaN, Double.NaN);
    assertEquals( c3, c1.divide(c2) ); // uses c3.equals(...)
  }
}