CircleTest.java

package net.vikhyat.circle;

import junit.framework.TestCase;
import org.junit.Before;
import org.junit.Test;

public class CircleTest extends TestCase {
    private Circle circle;

    @Before
    public void initializeCircle() {
        circle = new Circle(0, 0);
    }

    @Test
    public void testComputeRadius() throws Exception {
        assertEquals("computes radius correctly", 10.0, circle.computeRadius(314.1592653589), 0.01);
        assertEquals("updates computed radius", 100.0, circle.computeRadius(31415.92653589), 0.01);
    }

    @Test
    public void testComputeArea() throws Exception {
        assertEquals("computes area correctly", 314.1592653589, circle.computeArea(10.0), 0.01);
        assertEquals("updates computed area", 31415.92653589, circle.computeArea(100.0), 0.01);
    }

    @Test
    public void testGetFormattedRadius() throws Exception {
        circle = new Circle(10, 0);
        assertEquals("radius is formatted correctly", "10.0", circle.getFormattedRadius());
        circle = new Circle(234.234324, 0);
        assertEquals("radius is formatted correctly", "234.234", circle.getFormattedRadius());
    }

    @Test
    public void testGetFormattedArea() throws Exception {
        circle = new Circle(0, 10);
        assertEquals("area is formatted correctly", "10.0", circle.getFormattedArea());
        circle = new Circle(0, 123456789289.0);
        assertEquals("area switches to scientific notation when it is too long", "1.235E11", circle.getFormattedArea());
    }
}