diff -r 116fa3c8584f -r 1bd800376e0c pre_marking2/docdiff_test.sh
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/pre_marking2/docdiff_test.sh	Wed Dec 02 01:15:14 2020 +0000
@@ -0,0 +1,170 @@
+#!/bin/zsh
+
+# to make the script fail safely
+set -euo pipefail
+
+
+out=${1:-output}
+
+echo "" > $out
+
+echo `date` >> $out
+echo -e "Below is the feedback and provisional marks for your submission" >> $out
+echo -e "for the Preliminary Part of Part 2 (Scala).  Please note all marks are provisional until" >> $out
+echo -e "ratified by the assessment board -- this is not an official" >> $out
+echo -e "results transcript." >> $out
+echo -e "" >> $out
+
+echo -e "Below is the feedback for your submission docdiff.scala" >> $out
+echo -e "" >> $out
+
+# marks for CW7 preliminary part
+marks=$(( 0.0 ))
+
+
+# compilation tests
+
+function scala_compile {
+  (ulimit -t 30; JAVA_OPTS="-Xmx1g" scala -Xprint:parser "$1" 2> c$out 1> c$out)
+}
+
+# functional tests
+
+function scala_assert {
+  (ulimit -t 30; JAVA_OPTS="-Xmx1g" scala -nc -i "$1" -- "$2" -e "" 2> /dev/null 1> /dev/null)
+}
+
+# purity test
+
+function scala_vars {
+   (egrep '\bvar\b|\breturn\b|\.par\.|\.par |ListBuffer|AtomicInteger|mutable|util.control|new Array' c$out 2> /dev/null 1> /dev/null)
+}
+
+
+### compilation test
+
+echo -e "docdiff.scala runs?" |  tee -a $out
+
+if (scala_compile docdiff.scala)
+then
+    echo -e "  --> success" |  tee -a $out
+    tsts=$(( 0 ))
+else
+    echo -e "  --> SCALA DID NOT RUN docdiff.scala\n" |  tee -a $out
+    tsts=$(( 1 )) 
+fi
+
+
+# var, .par return, ListBuffer test
+#
+
+if  [ $tsts -eq 0 ]
+then     
+   echo -e "docdiff.scala does not contain VARS, RETURNS etc?" |  tee -a $out
+
+   if (scala_vars docdiff.scala)
+   then
+      echo -e "  --> test failed\n" | tee -a $out  
+      tsts=$(( 1 ))
+   else
+      echo -e "  --> success" |  tee -a $out
+      tsts=$(( 0 )) 
+   fi
+else
+   tsts=$(( 1 ))  
+fi 
+
+echo >> $out
+
+
+### docdiff clean tests
+
+if [ $tsts -eq 0 ]
+then
+  echo -e "docdiff.scala tests:" |  tee -a $out
+  echo -e "  clean(\"ab a abc\") == List(\"ab\", \"a\", \"abc\")" |  tee -a $out
+  echo -e "  clean(\"ab*a abc1\") == List(\"ab\", \"a\", \"abc1\")" |  tee -a $out
+
+  if (scala_assert "docdiff.scala" "docdiff_test1.scala")
+  then
+      echo -e "  --> success" |  tee -a $out
+      marks=$(( marks + 0.5 ))
+  else
+      echo -e "  --> ONE OF THE TESTS FAILED\n" |  tee -a $out
+  fi
+fi
+
+### docdiff occurrences tests
+
+if [ $tsts -eq 0 ]
+then
+  echo -e "  occurrences(List(\"a\", \"b\", \"b\", \"c\", \"d\")) == " |  tee -a $out
+  echo -e "      Map(\"a\" -> 1, \"b\" -> 2, \"c\" -> 1, \"d\" -> 1)" |  tee -a $out
+  echo -e "  " |  tee -a $out
+  echo -e "  occurrences(List(\"d\", \"b\", \"d\", \"b\", \"d\")) == " |  tee -a $out
+  echo -e "      Map(\"d\" -> 3, \"b\" -> 2)" |  tee -a $out
+  echo -e "  " |  tee -a $out
+  echo -e "  occurrences(Nil) == Map() " |  tee -a $out
+  echo -e "  " |  tee -a $out
+  echo -e "  occurrences(List(\"b\", \"b\", \"b\", \"b\", \"b\")) == Map(\"b\" -> 5)" |  tee -a $out
+
+  if (scala_assert "docdiff.scala" "docdiff_test2.scala") 
+  then
+      echo -e "  --> success" |  tee -a $out
+      marks=$(( marks + 1.0 ))
+  else
+      echo -e "  --> ONE OF THE TESTS FAILED\n" |  tee -a $out
+  fi
+fi
+
+### docdiff prod tests
+
+if [ $tsts -eq 0 ]
+then
+  echo -e "  val l1 = List(\"a\", \"b\", \"b\", \"c\", \"d\")" |  tee -a $out
+  echo -e "  val l2 = List(\"d\", \"b\", \"d\", \"b\", \"d\")" |  tee -a $out
+  echo -e "  " |  tee -a $out
+  echo -e "  prod(l1, l2) == 7 " |  tee -a $out
+  echo -e "  prod(l1, l1) == 7 " |  tee -a $out
+  echo -e "  prod(l2, l2) == 13 " |  tee -a $out
+  echo -e "  " |  tee -a $out
+  echo -e "  val l3 = List(\"1\", \"2\", \"3\", \"4\", \"5\")" |  tee -a $out
+  echo -e "  prod(l1, l3) == 0 " |  tee -a $out
+
+  if (scala_assert "docdiff.scala" "docdiff_test3.scala") 
+  then
+      echo -e "  --> success" |  tee -a $out
+      marks=$(( marks + 1.0 ))
+  else
+      echo -e "  --> ONE OF THE TESTS FAILED\n" |  tee -a $out
+  fi
+fi
+
+### docdiff overlap tests
+
+if [ $tsts -eq 0 ]
+then
+  echo -e "  val l1 = List(\"a\", \"b\", \"b\", \"c\", \"d\")" |  tee -a $out
+  echo -e "  val l2 = List(\"d\", \"b\", \"d\", \"b\", \"d\")" |  tee -a $out
+  echo -e "  " |  tee -a $out
+  echo -e "  overlap(l1, l2) == 0.5384615384615384 " |  tee -a $out
+  echo -e "  overlap(l1, l1) == 1.0 " |  tee -a $out
+  echo -e "  overlap(l2, l2) == 1.0 " |  tee -a $out
+
+  if (scala_assert "docdiff.scala" "docdiff_test4.scala") 
+  then
+      echo -e "  --> success" |  tee -a $out
+      marks=$(( marks + 0.5 ))
+  else
+      echo -e "  --> ONE OF THE TESTS FAILED\n" |  tee -a $out
+  fi
+fi
+
+
+## final marks
+echo -e "Overall mark for the Preliminary Part 2 (Scala)" | tee -a $out
+printf " %0.1f\n" $marks | tee -a $out
+
+
+#echo -e " $marks" | tee -a $out
+