Installing CSE 401/M501 MiniJava Testing Utility

1. Make sure you already have a MiniJava.java file in the src folder, have defined a public class MiniJava, which should have a public static void main(String[] args) method which always calls System.exit upon return.

2. Download utils.zip, unzip it, and move the unzipped utils folder to inside the test folder. Your project structure should now look like this:

cse401-24au-group id
├── build.xml
├── ...
├── src/
│   ├── ...
│   └── MiniJava.java
└── test/
    ├── junit/
    ├── resources/
    └── utils/
        ├── allow.java
        ├── CSE401TestUtils.java
        ├── ExecutionResult.java
        ├── MiniJavaTestBuilder.java
        ├── PrintStreams.java
        ├── README.txt
        └── ThrowingRunnable.java

2.1 If you use IntelliJ IDEA, right click on the utils folder in the IntelliJ IDEA Project panel, select Mark Directory As, then Test Sources Root.
See IntelliJ IDEA | content roots for more info.

3. Modify the build.xml file at the top of level of your project to compile the newly added files. You should do so by adding the blue, bolded part below to inside the compile-test target:

<target name="compile-test" depends="compile">
  <javac srcdir="test/utils" destdir="build/classes"
          classpath="lib/hamcrest-core-1.3.jar;lib/junit-4.12.jar;lib/java-cup-11b.jar"
          debug="true"
          includeAntRuntime="false">
  </javac>
  <javac srcdir="test/junit" destdir="build/classes"
          classpath="lib/hamcrest-core-1.3.jar;lib/junit-4.12.jar;lib/java-cup-11b.jar"
          debug="true"
          includeAntRuntime="false">
  </javac>
</target>

4. Next, update the test target in the same build.xml file, adding

1. fork="yes" to junit, and
2. <jvmarg value="-Djava.security.manager=allow"/> inside junit.

It should now look something like this:

<target name="test" depends="compile-test">
  <junit fork="yes">
    <jvmarg value="-Djava.security.manager=allow"/>
    <classpath>
    ...

4.1 If you use IntelliJ IDEA and run the JUnit tests using the Run button/menu instead of the ant command/window, see Testing MiniJava in IntelliJ.

5. To support how the testing framework detects the exit status, structure your MiniJava.main in one of two ways:

1. Only call System.exit outside of the try ... catch (Exception e) ...

   class MiniJava {
     public static void main(String[] args) {
       try {
         ...
       } catch (Exception e) {
         ...
       }
       // only System.exits here
       System.exit(...);
     }
   }
               

2. If your code structure doesn't allow for the above, alternatively you can re-throw SecurityException

   class MiniJava {
     public static void main(String[] args) {
       try {
         ...
         System.exit(...);
       } catch (SecurityException exit) {
         throw exit;
       } catch (Exception e) {
         ...
       }
     }
   }
               

6. Done. You should be able to use your existing ant commands just like before.