C Sc 227 Practice Test 1 Section Leader _________ Your Name _________________________
Complete this BEFORE your next section. Note: I did not time this test. It should take you longer than 50 minutes.
1. Write a checkmark √ to the right of any assertion if it would pass. Leave the line in the comment blank if
the assertion would fail (8pts)
public class ExpressionsTest extends junit.framework.TestCase
{
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. 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"
public class GraderTest extends junit.framework.TestCase {
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;
}
}
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