<< UNIX Assignment >>

1.Congratulations, you have been offered an internship position by the Galactic Empire! You will be working with the Death Star team as a test engineer, making sure that the Empire's proudest piece of machinery is fully operational so that the Emperor does not become the laughingstock of those Rebel Scum. Knowing that the DeathStar class has 4 constructors and 84 public methods, in general, how many units are there to be tested? (1 point)

YOUR ANSWER GOES HERE 

2.One of the methods you are testing is for the Death Star to make hologram calls. The method will take in a contact number as parameter, and returns theConnectionStream object if the call is connected and null if the call never was picked up. Complete the following test: (1 point)

public void testMakeHologramCall() { // construct a new Death Star DeathStar ds = new DeathStar(); // call Darth Vader String contact = "1 (202) 358-0001"; // this method should return null since Darth Vader never picks up calls ConnectionStream stream = ds.makeHologramCall(contact); // make assertion and fill in the blank (in the *BRACKETS* below) _________________________ } 

What goes in the underlined space?

YOUR ANSWER GOES HERE 

3.Another method, jumpToLightSpeed, takes in a coordinate as the parameter for the destination, and throws a HyperDriveOfflineException if the hyperdrive appears to be offline.

public void testJumpToLightSpeed(Coordinate destination) { // construct a new Death Star DeathStar ds = new DeathStar(); // turn off hyperdrive ds.hyperDrive.off(); // destination: Planet Alderaan Coordinate alderaan = LocationUtil.getCoordinate("Alderaan"); // trying to jump to light speed should throw an exception try { ds.jumpToLightSpeed(alderaan); // FIXME: POSITION A } catch (HyperDriveOfflineException e) { System.err.println(e); // FIXME: POSITION B } finally { // FIXME: POSITION C } } 

Choose the best place(s) to add the fail() statement where it says FIXME (i.e. 1, 2, or 3): (1 point)

YOUR ANSWER GOES HERE 

4.Now you're looking to save some time when coordinating the next raid on a Rebel base. To do this, you want to create a Makefile to automatically update the Galactic Fleet. In general, what is the default target inside a Makefile? (1 point)

YOUR ANSWER GOES HERE 

5. Assuming that you want the Makefile to recompile the test only ifDeathStar.java or DeathStarTester.java have been updated since the last time it was compiled. what goes to the dependency list below? (1 point)

DeathStarTester.class: __________________________ javac DeathStarTester.java 

What goes in the underlined space above?

YOUR ANSWER GOES HERE 

6. Explain what the following lines do in a Makefile. (1 point)

.SUFFIXES: .java .class .java.class: javac $< 

YOUR ANSWER GOES HERE 

7. Makefile Practice: See Makefile for details. (5 points)

Makefile

Your impressive work at your internship has won you a return offer at the Galactic Empire. You were but the student; now you are the master! You are responsible for all Imperial Vehicless software reliability. The vehicle classes include:

ATAT.java

ATST.java

DeathStar.java

ImperialShuttle.java

StarDestroyer.java

TIEBomber.java

TIEFighter.java

For each of these classes, there is a Tester class that contains all unit tests for the corresponding vehicle named as (Vehicle)Tester.java, where (Vehicle) can be replaced by any of the vehicle class name. Write a Makefile that does the following:

When make (Vehicle).class is typed in, the corresponding vehicle class is built, only if its Java source file has been updated since the last time it was built.

When make or make vehicles is typed in, each vehicle class will be built (ATAT.class, ATST.class, etc.) if the corresponding Java source file has been updated since the last time that class was built.

When make (Vehicle)Tester.class is typed in, the corresponding tester class is built, if (Vehicle).java or (Vehicle)Tester.java has been updated since the last time the tester was built.

When make tests is typed in, all tester classes will be built (ATATTester.class, ATSTTester.class, etc.), if the corresponding Java source file for that tester or the tested vehicle has been updated since the last time the tester was built.

When type in make clean, all class files will be removed.

HINTS:

Declare variables for your classes to try and organize your code

Make sure you understand the relationship between targets and dependencies

Remark

There are multiple ways to do this assignment! Make sure to test it. One common error is that students compile every file when they dont necessarily have to. For example, if we only change DeathStar.java, and we enter make vehicles, then we should ONLY update DeathStar.class since DeathStar.class file is now the only file out of date. You should NOT be recompiling every single file.