#!/bin/bash+
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+
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# to make the script fail safely+
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set -euo pipefail+
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+
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out=${1:-output}+
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+
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echo "" > $out+
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+
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echo "Below is the feedback and provisional marks for your submission" >> $out+
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echo "for assignment 7 Part 3.  Please note all marks are provisional until" >> $out+
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echo "ratified by the assessment board -- this is not an official" >> $out+
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echo "results transcript." >> $out+
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echo "" >> $out+
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+
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# marks for CW7 part 3+
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marks=$(( 0 ))+
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+
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+
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# compilation tests+
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+
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function scala_compile {+
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  (ulimit -t 30; JAVA_OPTS="-Xmx1g" scala -nc "$1" 2>> $out 1>> $out) +
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}+
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+
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# functional tests+
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+
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function scala_assert {+
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  (ulimit -t 30; JAVA_OPTS="-Xmx1g" scala -nc -i "$1" "$2" -e "" 2> /dev/null 1> /dev/null)+
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}+
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+
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# purity test+
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+
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function scala_vars {+
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   (egrep '\bvar\b|\breturn\b|\.par|ListBuffer|mutable|new Array' "$1" 2> /dev/null 1> /dev/null)+
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}+
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+
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# var, .par return, ListBuffer test+
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#+
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echo "danube.scala does not contain vars, returns etc?" | tee -a $out  +
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+
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if (scala_vars danube.scala)+
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then+
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  echo "  --> test failed" | tee -a $out  +
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  tsts0=$(( 1 ))+
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else+
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  echo -e "  --> success" | tee -a $out  +
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  tsts0=$(( 0 )) +
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fi+
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+
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### compilation test+
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if  [ $tsts0 -eq 0 ]+
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then +
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  echo "danube.scala runs?" | tee -a $out  +
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+
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  if (scala_compile danube.scala)+
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  then+
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    echo -e "  --> success" | tee -a $out  +
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    tsts=$(( 0 ))+
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  else+
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    echo "  --> scala danube.scala did not run successfully" | tee -a $out  +
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    tsts=$(( 1 )) +
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  fi+
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else+
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  tsts=$(( 1 ))     +
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fi+
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+
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### danube groupById test+
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+
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if [ $tsts -eq 0 ]+
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then+
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  echo "  val ls1 = List((\"1\", \"a\"), (\"2\", \"a\"), (\"1\", \"c\"), (\"2\", \"a\"), (\"1\", \"c\"))" | tee -a $out+
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  echo "  val ls2 = List((\"1\", \"a\"), (\"1\", \"b\"), (\"2\", \"x\"), (\"3\", \"a\"), (\"2\", \"y\"), (\"3\", \"c\"))" | tee -a $out+
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  echo "  groupById(ls1, Map()) == Map(1 -> List(c, c, a), 2 -> List(a, a))" | tee -a $out+
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  echo "  groupById(ls2, Map()) == Map(1 -> List(b, a), 2 -> List(x, y), 3 -> List(c, a))" | tee -a $out+
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  echo "      where the order in the lists is unimportant" | tee -a $out+
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  echo "  val ls3 = (1 to 1000).map(_.toString).toList" | tee -a $out+
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  echo "  val ls4 = ls3 zip ls3.tail" | tee -a $out+
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  echo "  val ls5 = ls4 ::: ls4.reverse" | tee -a $out+
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  echo "  groupById(ls5, Map()) == Map(1 -> List(2,2), 2 -> List(3,3), ....)" | tee -a $out+
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+
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  if (scala_assert "danube.scala" "danube_test3.scala")+
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  then+
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      echo -e "  --> success" | tee -a $out+
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      marks=$(( marks + 1 ))+
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  else+
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      echo -e "  --> test failed" | tee -a $out+
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  fi+
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fi+
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+
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### danube favourites tests+
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+
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if [ $tsts -eq 0 ]+
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then+
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  echo "  val good_ratings = process_ratings(ratings)" | tee -a $out+
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  echo "  val ratings_map = groupById(good_ratings, Map())" | tee -a $out+
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  echo "  favourites(ratings_map, \"912\").length  == 80 " | tee -a $out+
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  echo "  favourites(ratings_map, \"858\").length  == 158 " | tee -a $out+
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  echo "  favourites(ratings_map, \"260\").length  == 201 " | tee -a $out  +
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+
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  if (scala_assert "danube.scala" "danube_test4.scala") +
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  then+
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    echo "  --> success" | tee -a $out+
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    marks=$(( marks + 1 ))+
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  else+
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    echo "  --> one of the tests failed" | tee -a $out+
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  fi+
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fi+
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+
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### danube suggestions tests+
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+
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if [ $tsts -eq 0 ]+
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then+
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  echo "  val good_ratings = process_ratings(ratings)" | tee -a $out+
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  echo "  val ratings_map = groupById(good_ratings, Map())" | tee -a $out+
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  echo "  suggestions(ratings_map, \"912\").length  == 4110 " | tee -a $out+
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  echo "  suggestions(ratings_map, \"858\").length  == 4883 " | tee -a $out+
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  echo "  suggestions(ratings_map, \"260\").length  == 4970 " | tee -a $out  +
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  if (scala_assert "danube.scala" "danube_test5.scala") +
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  then+
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    echo "  --> success" | tee -a $out+
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    marks=$(( marks + 1 ))+
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  else+
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    echo "  --> one of the tests failed" | tee -a $out+
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  fi+
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fi+
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+
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### danube recommendation tests+
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+
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if [ $tsts -eq 0 ]+
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then+
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  echo "  recommendations(ratings_map, movies_map, \"1\").length  == 2 " | tee -a $out+
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  echo "  recommendations(ratings_map, movies_map, \"2\").length  == 2 " | tee -a $out+
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  echo "  recommendations(ratings_map, movies_map, \"3\").length  == 2 " | tee -a $out+
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  echo "  recommendations(ratings_map, movies_map, \"4\").length  == 0 " | tee -a $out+
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  echo "  recommendations(ratings_map, movies_map, \"5\").length  == 2 " | tee -a $out+
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+
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  if (scala_assert "danube.scala" "danube_test6.scala") +
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  then+
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    echo "  --> success" | tee -a $out+
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    marks=$(( marks + 1 ))+
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  else+
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    echo "  --> one of the tests failed" | tee -a $out+
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  fi+
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fi+
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+
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+
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## final marks+
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echo "Overall mark for CW 7, Part 3" | tee -a $out+
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echo "$marks" | tee -a $out+
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