C Sc 227 Spring 2008 Practice Test 1 Your Name ___________________________ /100
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 (8pts)
@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 grade (fill in the blanks) so it executes every branch of code in the nested selection.
Assume the grade method is in the same unit test as testGrade. The method represents this grading policy (10pts)
Percentage Grade
90.0 percentage "A"
80.0 percentage < 90.0 "B"
70.0 percentage < 80.0 "C"
60.0 percentage < 70.0 "D"
percentage < 60.0 "E"
@Test
public void testGrade() {
assertEquals(___________________________________);
assertEquals(___________________________________);
assertEquals(___________________________________);
assertEquals(___________________________________);
assertEquals(___________________________________);
}
public String grade(double percentage) {
String result = "";
if (percentage >= 90.0)
result = "A";
else if (percentage >= 80.0)
result = "B";
else if (percentage >= 70.0)
result = "C";
else if (percentage >= 60.0)
result = "D";
else
result = "E";
return result;
}
}
1
