FindLast
<source lang="java"> /**
* If x == null throw NullPointerException, else return the index * of the last element in x that equals y. If no such element * exists, return -1. */
public int findLast(int[] x, int y) { for (int i=x.length-1; i > 0; i--) { if (x[i] == y) { return i; } } return -1; } </source>
- Identify the fault for the test case {Input: x = [2, 3, 5], y = 2; Expected output = 0}.
- If possible, identify a test case that does not execute the fault.
- If possible, identify a test case that executes the fault, but does not result in an error state.
- If possible identify a test case that results in an error, but not a failure. Hint: Don’t forget about the program counter.
- For the given test case, identify the first error state. Be sure to describe the complete state.
- Fix the fault and verify that the given test now produces the expected output.