add check for ListExamples.java in grade.sh

grade.sh

@@ -8,9 +8,39 @@ mkdir grading-area
 git clone $1 student-submission
 echo 'Finished cloning'
 
+if [[ -f student-submission/ListExamples.java ]]
+then
+  echo "ListExamples.java file found."
+else
+    echo "ListExamples.java file not found"
+    echo "Grade: 0"
+    exit
+fi
 
+mv student-submission/ListExamples.java grading-area
+cp -r TestListExamples.java grading-area
+cp -r lib grading-area
+cd grading-area || exit
+javac -cp .:lib/hamcrest-core-1.3.jar:lib/junit-4.13.2.jar *.java &> compliation-results.txt
+java -cp .:lib/hamcrest-core-1.3.jar:lib/junit-4.13.2.jar org.junit.runner.JUnitCore TestListExamples > test-results.txt
+error=$?
+
+cd .. || exit
+if [[ error -ne 0 ]]
+then
+  echo "Error code " $error
+else
+  echo "All tests passed"
+  exit
+fi
 # Draw a picture/take notes on the directory structure that's set up after
 # getting to this point
 
 # Then, add here code to compile and run, and do any post-processing of the
 # tests
+
+test_failures=$(tail -4 grading-area/test-results.txt | grep Failures | cut -d " " -f 6)
+compilation_errors=$(tail -2 grading-area/compliation-results.txt | grep error | cut -d " " -f 1 )
+
+score=$((100 - test_failures * 10 - compilation_errors * 10))
+echo "Score: $score"

grading-area/ListExamples.java

@@ -0,0 +1,57 @@
+import java.util.ArrayList;
+import java.util.List;
+
+interface StringChecker { boolean checkString(String s); }
+
+class ListExamples {
+
+  static List<String> result = new ArrayList<>();
+  // Returns a new list that has all the elements of the input list for which
+  // the StringChecker returns true, and not the elements that return false, in
+  // the same order they appeared in the input list;
+  static List<String> filter(List<String> list, StringChecker sc) {
+    if(list.size() == 0) { return list; }
+    result.clear();
+    for(String s: list) {
+      if(sc.checkString(s)) {
+        result.add(s);
+      }
+    }
+    return result;
+  }
+
+
+  // Takes two sorted list of strings (so "a" appears before "b" and so on),
+  // and return a new list that has all the strings in both list in sorted order.
+  static List<String> merge(List<String> list1, List<String> list2) {
+    List<String> result = new ArrayList<>();
+    int index1 = 0, index2 = 0;
+    while(index1 < list1.size() && index2 < list2.size()) {
+      int compared = list1.get(index1).compareTo(list2.get(index2));
+      if(compared == 0) {
+        result.add(list1.get(index1));
+        index1 += 1;
+        index2 += 1;
+      }
+      else if(compared < 0) {
+        result.add(list1.get(index1));
+        index1 += 1;
+      }
+      else {
+        result.add(list2.get(index2));
+        index2 += 1;
+      }
+    }
+    while(index1 < list1.size()) {
+      result.add(list1.get(index1));
+      index1 += 1;
+    }
+    while(index2 < list2.size()) {
+      result.add(list2.get(index2));
+      index2 += 1;
+    }
+    return result;
+  }
+
+
+}

grading-area/TestListExamples.java

@@ -0,0 +1,21 @@
+import static org.junit.Assert.*;
+import org.junit.*;
+import java.util.Arrays;
+import java.util.List;
+
+class IsMoon implements StringChecker {
+  public boolean checkString(String s) {
+    return s.equalsIgnoreCase("moon");
+  }
+}
+
+public class TestListExamples {
+  @Test(timeout = 500)
+  public void testMergeRightEnd() {
+    List<String> left = Arrays.asList("a", "b", "c");
+    List<String> right = Arrays.asList("a", "d");
+    List<String> merged = ListExamples.merge(left, right);
+    List<String> expected = Arrays.asList("a", "a", "b", "c", "d");
+    assertEquals(expected, merged);
+  }
+}

grading-area/test-results.txt

@@ -0,0 +1,15 @@
+JUnit version 4.13.2
+.E
+Time: 0.007
+There was 1 failure:
+1) testMergeRightEnd(TestListExamples)
+java.lang.AssertionError: expected:<[a, a, b, c, d]> but was:<[a, b, c, d]>
+	at org.junit.Assert.fail(Assert.java:89)
+	at org.junit.Assert.failNotEquals(Assert.java:835)
+	at org.junit.Assert.assertEquals(Assert.java:120)
+	at org.junit.Assert.assertEquals(Assert.java:146)
+	at TestListExamples.testMergeRightEnd(TestListExamples.java:19)
+
+FAILURES!!!
+Tests run: 1,  Failures: 1
+

list-examples-grader.iml

@@ -0,0 +1,12 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<module type="JAVA_MODULE" version="4">
+  <component name="NewModuleRootManager" inherit-compiler-output="true">
+    <exclude-output />
+    <content url="file://$MODULE_DIR$">
+      <sourceFolder url="file://$MODULE_DIR$" isTestSource="false" />
+    </content>
+    <orderEntry type="inheritedJdk" />
+    <orderEntry type="sourceFolder" forTests="false" />
+    <orderEntry type="library" name="lib" level="project" />
+  </component>
+</module>