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/*
* Copyright 2013 Jesse Morgan
*/
package com.p4square.grow.model;
import org.junit.Test;
import static org.junit.Assert.*;
/**
* Tests for the Point class.
*
* @author Jesse Morgan <jesse@jesterpm.net>
*/
public class PointTest {
private static final double DELTA = 1e-15;
public static void main(String... args) {
org.junit.runner.JUnitCore.main(PointTest.class.getName());
}
/**
* Verify that the constructor works properly.
*/
@Test
public void testHappyCase() {
Point p = new Point(1, 2);
assertEquals(1, p.getX(), DELTA);
assertEquals(2, p.getY(), DELTA);
}
/**
* Verify distance is computed correctly.
*/
@Test
public void testDistance() {
Point p1, p2;
// Simple line
p1 = new Point(2, 1);
p2 = new Point(-2, 1);
assertEquals(4, p1.distance(p2), DELTA);
assertEquals(4, p2.distance(p1), DELTA);
// Across origin
p1 = new Point(5, 1);
p2 = new Point(-3, -2);
assertEquals(Math.sqrt(73), p1.distance(p2), DELTA);
assertEquals(Math.sqrt(73), p2.distance(p1), DELTA);
}
/**
* Verify toString returns the expected string.
*/
@Test
public void testToString() {
Point p = new Point(-1.12345, 2.3);
assertEquals("-1.12,2.30", p.toString());
}
/**
* Verify that valueOf correctly parses a variety of strings.
*/
@Test
public void testValueOfHappyCase() {
Point p;
p = Point.valueOf("1,2");
assertEquals(1, p.getX(), DELTA);
assertEquals(2, p.getY(), DELTA);
p = Point.valueOf("1.5,2.0");
assertEquals(1.5, p.getX(), DELTA);
assertEquals(2.0, p.getY(), DELTA);
p = Point.valueOf("-1.5,2.0");
assertEquals(-1.5, p.getX(), DELTA);
assertEquals(2.0, p.getY(), DELTA);
p = Point.valueOf("1.5,-2.0");
assertEquals(1.5, p.getX(), DELTA);
assertEquals(-2.0, p.getY(), DELTA);
p = Point.valueOf("-1.5,-2.0");
assertEquals(-1.5, p.getX(), DELTA);
assertEquals(-2.0, p.getY(), DELTA);
}
/**
* Verify that valueOf fails on null string.
*/
@Test(expected = NullPointerException.class)
public void testValueOfNull() {
Point.valueOf(null);
}
/**
* Verify that valueOf fails on empty string.
*/
@Test(expected = IllegalArgumentException.class)
public void testValueOfEmptyString() {
Point.valueOf("");
}
/**
* Verify that valueOf fails on missing comma.
*/
@Test(expected = IllegalArgumentException.class)
public void testValueOfMissingComma() {
Point.valueOf("123");
}
/**
* Verify that valueOf fails on missing x.
*/
@Test(expected = IllegalArgumentException.class)
public void testValueOfMissingX() {
Point.valueOf(",12");
}
/**
* Verify that valueOf fails on missing y.
*/
@Test(expected = IllegalArgumentException.class)
public void testValueOfMissingY() {
Point.valueOf("12,");
}
}
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