barney-comments.java

	//mutation-driven
	//cause an error; the program should deal with the negative number
	@Test
	public void testPurchasesWithNegativeNumbers(){
		DiscountCalculator calc = new DiscountCalculator();	
		dayZero.set(2011, Calendar.JANUARY, 15, 0, 8, 45);
		Account winner = a(d(-19), d(-4), p("reggae", 8, d(-12)), p("rock-a-billy", -10, d(-7)));
		Discount d = calc.getSpecialDiscount(winner, d(-1));
		//System.out.println( d.getDiscount() );
		assertEquals("Probably should throw exception on purchases with negative amounts.", d.getDiscount().multiply(new BigDecimal(100)).intValue());
	}
	
	@Test  //?? Why is the discount returning 0 when i
	public void testPurchaseReggaeAndJazzEqualToTen(){
		DiscountCalculator calc = new DiscountCalculator();	
		dayZero.set(2011, Calendar.SEPTEMBER, 15, 0, 8, 45);
		Account winner = a(d(-19), d(-4), p("reggae", 6, d(-12)), p("jazz", 4, d(-7)));
		Discount d = calc.getSpecialDiscount(winner, d(1));
		System.out.println( d.getDiscount().multiply(new BigDecimal(100)).intValue() );
		assertEquals(0, d.getDiscount().multiply(new BigDecimal(100)).intValue());
	}
	
	//this test use endDate that is before the startDate and the program should give error message
	@Test
	public void testEndDateBeforeStartDate(){
		DiscountCalculator calc = new DiscountCalculator();	
		dayZero.set(2011, Calendar.SEPTEMBER, 15, 0, 8, 45);
		Account winner = a(d(-19), d(-4), p("reggae", 6, d(-12)), p("jazz", 4, d(-7)));
		System.out.println( calc.getDiscount(winner, d(8), d(1) ) );
		assertEquals("The endDate should be after the startDdate", calc.getDiscount(winner, d(8), d(1)));
	}
	
	//this may cause the program to refactor
	//the method getLoyaltyDiscount uses three parameters but the endDate seems not useful
	//also new BigDecimal(discountPercentage).divide(new BigDecimal(100)) != new BigDecimal(0.15)
	//also new BigDecimal(discountPercentage).divide(new BigDecimal(100)) != 0.15
	//refactoring or not?
	@Test	
	public void testEndDate(){
		DiscountCalculator calc = new DiscountCalculator();	
		assertEquals(new BigDecimal(0.15), calc.getLoyaltyDiscount(a(d(-400), d(-400), p(100, d(-100))), d(0), d(300)).getDiscount());
	}