test case for empty project

src/Util.rsc

@@ -48,7 +48,7 @@ loc getMainClass(M3 model)
   mainClasses = range(domainR(invert(model.containment), getMainMethods(model)));
   if(size(mainClasses) < 1)
   {
-    throw error("There should be a Main class.", |file:///|);
+    throw error("There should be a Main class", |file:///|);
   }
   return getOneFrom(mainClasses);
 }

src/test-data/assignment02-double-zip/feedback.txt

+Grade: 0
+Feedback: You doublezipped your project (which was the one for week 1) so I have to give you a fail. Please try and submit your solutions in the correct format from now on (in Netbeans you have an export to zip option).
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src/test-data/assignment02-double-zip/metadata.json

+{
+  "courseName": "oo1920",
+  "folderId": "34172",
+  "entityType": "Group",
+  "entityId": 128861,
+  "submissionDate": "2020-02-16T14_53_23.530Z"
+}
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src/test-data/assignment02-double-zip/personal-prof-feedback2020-02-16T14_53_23.530Z.txt

+Hi, this is Personal Prof, the automatic feedback system.
+Here is what I think about your submission.
+
+

src/test-data/assignment02-double-zip/submission/Assingment 2 Answers Samuel Dankers && Floris van der Werff.zip.contents

+Archive:  128861 - 34172 - AsgnA 140 - Samuel Dankers - 2020-02-16T14_53_23.530Z/submission/Assingment 2 Answers Samuel Dankers && Floris van der Werff.zip
+  inflating: 128861 - 34172 - AsgnA 140 - Samuel Dankers - 2020-02-16T14_53_23.530Z/submission/Assingment 2 Answers Samuel Dankers && Floris van der Werff  [binary]
+   creating: 128861 - 34172 - AsgnA 140 - Samuel Dankers - 2020-02-16T14_53_23.530Z/submission/__MACOSX/
+  inflating: 128861 - 34172 - AsgnA 140 - Samuel Dankers - 2020-02-16T14_53_23.530Z/submission/__MACOSX/._Assingment 2 Answers Samuel Dankers && Floris van der Werff  [binary]

src/test/AssignmentHangmanRulesSpec.rsc

@@ -38,6 +38,19 @@ test bool aHangmannoUseStringBuilder()
 test bool aHangmanparameterizedView()
 {
   errors = allAssignmentHangmanRules(loadTestProject("assignment02-parameterized-view"));
-  print(errors);
   return isEmpty(errors);
+}
+
+
+// Some students handed in a doubly zipped submission, where personal prof could
+// not find a Main class. This led to an uncaught exception. This test case runs
+// the hangman rules on their submission.
+test bool aHangmanDoubleZip()
+{
+  errors = allAssignmentHangmanRules(loadTestProject("assignment02-double-zip"));
+  for( err <- errors ) println(err);
+  return
+    { "There should be a Main class"
+    , "There should be a class called Gallows"
+    } == messages(errors);
 }
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