C Sc 227 Summer 2007 Practice Quiz 1 Your Name ___________________________ /50
1. Write a checkmark Ö to the right of any assertion if it would pass. Leave the line in the comment blank if the assertion
would fail (16pts)
@Test
public void testExpressions() {
int j = 5;
int k = 3;
double x = -1.5;
String s = "U of Arizona";
assertEquals(2, j / k); // a. ______
assertEquals(1, j % k); // b. ______
assertEquals(-0.5, x + 1, 1e-12); // c. ______
assertEquals('U', s.charAt(1)); // d. ______
assertEquals(5, s.indexOf("Arizona")); // e. ______
assertEquals(0, s.indexOf("U of A")); // f. ______
assertTrue(s.compareTo("ASU") > 0); // g. ______
assertEquals(2.0, Math.sqrt(j), 1e-12); // h. ______
}
}
2. Complete the unit test for method tax (fill in the blanks) so it executes every branch of code in the nested selection.
The method represents the tax policy for Ebonia. Also complete the method
Income
$0 to $10,000 3% of income
$10,000 to $20,000 $300, plus 4% of the amount over $10,000
$20,000 to $30,000 $700, plus 5% of the amount over $20,000
$30,000 and over $1,200, plus 6% of the amount over $30,000
@Test
public void testGrade() {
assertEquals(__________, tax(____________), 1e-12);
assertEquals(__________, tax(____________), 1e-12);
assertEquals(__________, tax(____________), 1e-12);
assertEquals(__________, tax(____________), 1e-12);
assertEquals(__________, tax(____________), 1e-12);
}
// Complete this method here
public double tax(int income)
1
