package junitspec;
import static org.junit.Assert.*;

import org.junit.Before;
import org.junit.Test;

public abstract class RandomWithParityTest {

	protected RandomWithParity p;
	
	@Before
	public abstract void setUp();

	@Test
	public void minRange() {
		int actual = this.p.generateNumber(1);
		assertTrue ("Random number is 0 or 1",
				(actual == 0) || (actual == 1));
	}

	@Test
	public void repeatedMinRange() {
		int actual;
		for (int i = 0; i< 30; i++) {
			actual = this.p.generateNumber(1);
			assertTrue ("Random number is 0 or 1",
					(actual == 0) || (actual == 1));			
		}
	}
	
	@Test
	public void increasingRanges(){
		int actual;
		for (int i = 0; i< 30; i++) {
			actual = this.p.generateNumber(1+2*i);
			assertTrue ("Random number is even",
					(actual % 2 == 0));
			actual = this.p.generateNumber(2+2*i);
			assertTrue ("Random number is even",
					(actual % 2 == 1));
		}
	}
	
	@Test
	public void maxRange(){
		int actual = this.p.generateNumber(Integer.MAX_VALUE);
		assertTrue ("Maximum range", actual % 2 == 0);
	}
		
	@Test(timeout=100)
	public void largeRange(){
		int actual = this.p.generateNumber(100000);
		actual--; //avoid unused variable warning
		assertTrue ("Large range", true);
	}
}