From 0681730fcb7bbb718a61051402d80832586037c3 Mon Sep 17 00:00:00 2001
From: ashahidu <ashahidu@caltech.edu>
Date: Mon, 3 Aug 2020 17:36:07 -0700
Subject: [PATCH] fixed issues

---
 .../cs2/datastructures/ArrayDequeTests.java   |  49 +++--
 .../CircularArrayFixedSizeQueueTests.java     |  67 +++----
 .../cs2/datastructures/LinkedDequeTests.java  |  83 +++++----
 .../edu/caltech/cs2/helpers/NodeChecker.java  | 169 ++++++++++++------
 tests/edu/caltech/cs2/helpers/Reflection.java | 132 +++++++-------
 .../cs2/project03/GuitarStringTests.java      |  74 +++-----
 6 files changed, 302 insertions(+), 272 deletions(-)

diff --git a/tests/edu/caltech/cs2/datastructures/ArrayDequeTests.java b/tests/edu/caltech/cs2/datastructures/ArrayDequeTests.java
index 2690afc..2d6fae9 100644
--- a/tests/edu/caltech/cs2/datastructures/ArrayDequeTests.java
+++ b/tests/edu/caltech/cs2/datastructures/ArrayDequeTests.java
@@ -25,7 +25,7 @@ import static org.junit.jupiter.api.Assertions.assertEquals;
 @TestMethodOrder(MethodOrderer.OrderAnnotation.class)
 @Tag("C")
 public class ArrayDequeTests implements DequeTests, StackTests, QueueTests {
-  private static String ARRAY_DEQUE_SOURCE ="src/edu/caltech/cs2/datastructures/ArrayDeque.java";
+  private static String ARRAY_DEQUE_SOURCE = "src/edu/caltech/cs2/datastructures/ArrayDeque.java";
 
   private Constructor arrayDequeConstructor = Reflection.getConstructor(ArrayDeque.class);
 
@@ -42,7 +42,7 @@ public class ArrayDequeTests implements DequeTests, StackTests, QueueTests {
   }
 
   public IQueue<Object> newQueue() {
-      return Reflection.newInstance(arrayDequeConstructor);
+    return Reflection.newInstance(arrayDequeConstructor);
   }
 
   public IQueue<Object> newQueue(int size) {
@@ -93,26 +93,19 @@ public class ArrayDequeTests implements DequeTests, StackTests, QueueTests {
     Reflection.assertNoProtectedFields(ArrayDeque.class);
   }
 
+  @Order(classSpecificTestLevel)
+  @DisplayName("All fields in ArrayDeque have modifiers")
+  @Test
+  public void testFieldModifiers() {
+    Reflection.assertFieldModifiers(ArrayDeque.class);
+  }
+
   @Order(classSpecificTestLevel)
   @DisplayName("The public interface is correct")
   @Test
   public void testPublicInterface() {
-    Reflection.assertPublicInterface(ArrayDeque.class, List.of(
-            "addFront",
-            "addBack",
-            "removeFront",
-            "removeBack",
-            "enqueue",
-            "dequeue",
-            "push",
-            "pop",
-            "peek",
-            "peekFront",
-            "peekBack",
-            "iterator",
-            "size",
-            "toString"
-    ));
+    Reflection.assertPublicInterface(ArrayDeque.class, List.of("addFront", "addBack", "removeFront", "removeBack",
+        "enqueue", "dequeue", "push", "pop", "peek", "peekFront", "peekBack", "iterator", "size", "toString"));
   }
 
   @Order(classSpecificTestLevel)
@@ -122,7 +115,6 @@ public class ArrayDequeTests implements DequeTests, StackTests, QueueTests {
     Inspection.assertConstructorHygiene(ARRAY_DEQUE_SOURCE);
   }
 
-
   // TOSTRING TESTS ---------------------------------------------------
 
   @Order(toStringTestLevel)
@@ -135,9 +127,7 @@ public class ArrayDequeTests implements DequeTests, StackTests, QueueTests {
   @Order(toStringTestLevel)
   @DisplayName("toString() matches java.util.ArrayDeque")
   @ParameterizedTest(name = "Test toString() on [{arguments}]")
-  @ValueSource(strings = {
-          "0, 1, 2, 3", "5, 4, 3, 2, 1", "8, 3, 5, 7, 4, 3, 12, 12, 1"
-  })
+  @ValueSource(strings = { "0, 1, 2, 3", "5, 4, 3, 2, 1", "8, 3, 5, 7, 4, 3, 12, 12, 1" })
   public void testToString(String inputs) {
     java.util.ArrayDeque<String> reference = new java.util.ArrayDeque<String>();
     edu.caltech.cs2.datastructures.ArrayDeque<String> me = new edu.caltech.cs2.datastructures.ArrayDeque<>();
@@ -165,7 +155,8 @@ public class ArrayDequeTests implements DequeTests, StackTests, QueueTests {
     Consumer<IDeque<Integer>> removeFront = (IDeque<Integer> q) -> q.removeFront();
 
     RuntimeInstrumentation.assertAtMost("addFront", RuntimeInstrumentation.ComplexityType.LINEAR, provide, addFront, 8);
-    RuntimeInstrumentation.assertAtMost("removeFront", RuntimeInstrumentation.ComplexityType.LINEAR, provide, removeFront, 8);
+    RuntimeInstrumentation.assertAtMost("removeFront", RuntimeInstrumentation.ComplexityType.LINEAR, provide,
+        removeFront, 8);
   }
 
   @Order(complexityTestLevel)
@@ -183,7 +174,8 @@ public class ArrayDequeTests implements DequeTests, StackTests, QueueTests {
     Consumer<IDeque<Integer>> removeBack = (IDeque<Integer> q) -> q.removeBack();
 
     RuntimeInstrumentation.assertAtMost("addBack", RuntimeInstrumentation.ComplexityType.LINEAR, provide, addBack, 8);
-    RuntimeInstrumentation.assertAtMost("removeBack", RuntimeInstrumentation.ComplexityType.LINEAR, provide, removeBack, 8);
+    RuntimeInstrumentation.assertAtMost("removeBack", RuntimeInstrumentation.ComplexityType.LINEAR, provide, removeBack,
+        8);
   }
 
   @Order(complexityTestLevel)
@@ -251,7 +243,8 @@ public class ArrayDequeTests implements DequeTests, StackTests, QueueTests {
     };
     Consumer<IDeque<Integer>> peekFront = (IDeque<Integer> q) -> q.peekFront();
 
-    RuntimeInstrumentation.assertAtMost("peekFront", RuntimeInstrumentation.ComplexityType.CONSTANT, provide, peekFront, 8);
+    RuntimeInstrumentation.assertAtMost("peekFront", RuntimeInstrumentation.ComplexityType.CONSTANT, provide, peekFront,
+        8);
   }
 
   @Order(complexityTestLevel)
@@ -267,6 +260,8 @@ public class ArrayDequeTests implements DequeTests, StackTests, QueueTests {
     };
     Consumer<IDeque<Integer>> peekBack = (IDeque<Integer> q) -> q.peekBack();
 
-    RuntimeInstrumentation.assertAtMost("peekBack", RuntimeInstrumentation.ComplexityType.CONSTANT, provide, peekBack, 8);
+    RuntimeInstrumentation.assertAtMost("peekBack", RuntimeInstrumentation.ComplexityType.CONSTANT, provide, peekBack,
+        8);
   }
-}
+  
+}
\ No newline at end of file
diff --git a/tests/edu/caltech/cs2/datastructures/CircularArrayFixedSizeQueueTests.java b/tests/edu/caltech/cs2/datastructures/CircularArrayFixedSizeQueueTests.java
index d94b2de..d1127e6 100644
--- a/tests/edu/caltech/cs2/datastructures/CircularArrayFixedSizeQueueTests.java
+++ b/tests/edu/caltech/cs2/datastructures/CircularArrayFixedSizeQueueTests.java
@@ -5,6 +5,7 @@ import edu.caltech.cs2.helpers.Reflection;
 import edu.caltech.cs2.helpers.RuntimeInstrumentation;
 import edu.caltech.cs2.interfaces.IFixedSizeQueue;
 import edu.caltech.cs2.interfaces.IQueue;
+import org.hamcrest.collection.IsIterableContainingInOrder;
 import org.junit.jupiter.api.*;
 import org.junit.jupiter.params.ParameterizedTest;
 import org.junit.jupiter.params.provider.CsvSource;
@@ -16,15 +17,15 @@ import java.util.function.Consumer;
 import java.util.function.Function;
 
 import static edu.caltech.cs2.project03.Project03TestOrdering.*;
-import static org.junit.jupiter.api.Assertions.assertEquals;
-import static org.junit.jupiter.api.Assertions.fail;
+import static org.junit.jupiter.api.Assertions.*;
 
 @Tag("B")
 @TestMethodOrder(MethodOrderer.OrderAnnotation.class)
 public class CircularArrayFixedSizeQueueTests implements FixedSizeQueueTests {
-  private static String FIXED_QUEUE_SOURCE ="src/edu/caltech/cs2/datastructures/CircularArrayFixedSizeQueue.java";
+  private static String FIXED_QUEUE_SOURCE = "src/edu/caltech/cs2/datastructures/CircularArrayFixedSizeQueue.java";
 
-  private Constructor circFixedSizeQueueConstructor = Reflection.getConstructor(CircularArrayFixedSizeQueue.class, int.class);
+  private Constructor circFixedSizeQueueConstructor = Reflection.getConstructor(CircularArrayFixedSizeQueue.class,
+      int.class);
   private int DEFAULT_CAPACITY = 10;
 
   public IQueue<Object> newQueue() {
@@ -78,20 +79,19 @@ public class CircularArrayFixedSizeQueueTests implements FixedSizeQueueTests {
     Reflection.assertNoProtectedFields(CircularArrayFixedSizeQueue.class);
   }
 
+  @Order(classSpecificTestLevel)
+  @DisplayName("All fields in CircularArrayFixedSizeQueue have modifiers")
+  @Test
+  public void testFieldModifiers() {
+    Reflection.assertFieldModifiers(CircularArrayFixedSizeQueue.class);
+  }
+
   @Order(classSpecificTestLevel)
   @DisplayName("The public interface is correct")
   @Test
   public void testPublicInterface() {
-    Reflection.assertPublicInterface(CircularArrayFixedSizeQueue.class, List.of(
-            "enqueue",
-            "dequeue",
-            "peek",
-            "iterator",
-            "size",
-            "isFull",
-            "capacity",
-            "toString"
-    ));
+    Reflection.assertPublicInterface(CircularArrayFixedSizeQueue.class,
+        List.of("enqueue", "dequeue", "peek", "iterator", "size", "isFull", "capacity", "toString"));
   }
 
   @Order(classSpecificTestLevel)
@@ -101,7 +101,6 @@ public class CircularArrayFixedSizeQueueTests implements FixedSizeQueueTests {
     Inspection.assertConstructorHygiene(FIXED_QUEUE_SOURCE);
   }
 
-
   // TOSTRING TESTS ---------------------------------------------------
 
   @Order(toStringTestLevel)
@@ -114,9 +113,7 @@ public class CircularArrayFixedSizeQueueTests implements FixedSizeQueueTests {
   @Order(toStringTestLevel)
   @DisplayName("toString() matches java.util.ArrayDeque")
   @ParameterizedTest(name = "Test toString() on [{arguments}]")
-  @ValueSource(strings = {
-          "0, 1, 2, 3", "5, 4, 3, 2, 1", "8, 3, 5, 7, 4, 3, 12, 12, 1"
-  })
+  @ValueSource(strings = { "0, 1, 2, 3", "5, 4, 3, 2, 1", "8, 3, 5, 7, 4, 3, 12, 12, 1" })
   public void testToString(String inputs) {
     java.util.ArrayDeque<String> reference = new java.util.ArrayDeque<String>();
     Constructor c = Reflection.getConstructor(CircularArrayFixedSizeQueue.class, int.class);
@@ -136,7 +133,7 @@ public class CircularArrayFixedSizeQueueTests implements FixedSizeQueueTests {
   public void testQueueOperationComplexity() {
     Function<Integer, IFixedSizeQueue<Integer>> provide = (Integer numElements) -> {
       Constructor c = Reflection.getConstructor(CircularArrayFixedSizeQueue.class, int.class);
-      IFixedSizeQueue<Integer> q = Reflection.newInstance(c, numElements*2);
+      IFixedSizeQueue<Integer> q = Reflection.newInstance(c, numElements * 2);
       for (int i = 0; i < numElements; i++) {
         q.enqueue(i);
       }
@@ -149,14 +146,13 @@ public class CircularArrayFixedSizeQueueTests implements FixedSizeQueueTests {
     RuntimeInstrumentation.assertAtMost("dequeue", RuntimeInstrumentation.ComplexityType.CONSTANT, provide, dequeue, 8);
   }
 
-
   @Order(complexityTestLevel)
   @DisplayName("peek() takes constant time")
   @Test()
   public void testPeekComplexity() {
     Function<Integer, IFixedSizeQueue<Integer>> provide = (Integer numElements) -> {
       Constructor c = Reflection.getConstructor(CircularArrayFixedSizeQueue.class, int.class);
-      IFixedSizeQueue<Integer> q = Reflection.newInstance(c, numElements*2);
+      IFixedSizeQueue<Integer> q = Reflection.newInstance(c, numElements * 2);
       for (int i = 0; i < numElements; i++) {
         q.enqueue(i);
       }
@@ -170,40 +166,27 @@ public class CircularArrayFixedSizeQueueTests implements FixedSizeQueueTests {
   @Order(fixedSizeQueueLevel)
   @DisplayName("Test iterator matches reference")
   @ParameterizedTest(name = "Test iterator with {1} random values with seed = {0} and fixed array size = {2}")
-  @CsvSource({
-          "69, 200, 20", "21, 300, 200"
-  })
+  @CsvSource({ "69, 200, 20", "21, 300, 200" })
   public void testWrapAround(int seed, int numVals, int queueSize) {
     Random r = new Random(seed);
-    Constructor c = Reflection.getConstructor(CircularArrayFixedSizeQueue.class, int.class);
     IFixedSizeQueue<Object> me = newFixedSizeQueue(queueSize);
     Queue<Object> reference = new java.util.ArrayDeque<>();
     assertEquals(queueSize, me.capacity(), "capacity does not match expected value");
     for (int i = 0; i < queueSize; i++) {
-        int num = r.nextInt();
-        assertEquals(false, me.isFull(), "queue should not be full");
-        assertEquals(true, me.enqueue(num), "enqueue should be successful");
-        reference.add(num);
+      int num = r.nextInt();
+      assertFalse(me.isFull(), "queue should not be full");
+      assertTrue(me.enqueue(num), "enqueue should be successful");
+      reference.add(num);
 
     }
     for (int i = 0; i < numVals; i++) {
       me.enqueue(me.dequeue());
       reference.add(reference.remove());
-      assertEquals(reference.peek(), me.peek(),"return values of peek()s are not equal");
+      assertEquals(reference.peek(), me.peek(), "return values of peek()s are not equal");
       assertEquals(reference.size(), me.size(), "size()s are not equal");
       assertEquals(queueSize, me.capacity(), "capacity of a fixed size queue should not change");
-      Iterator<Object> meItr = me.iterator();
-      Iterator<Object> refItr = reference.iterator();
-      while (meItr.hasNext()) {
-        if (!refItr.hasNext()) {
-          fail("Implemented queue has more values than reference queue");
-        }
-        assertEquals(refItr.next(), meItr.next(), "next()s are not equal");
-      }
-      if (refItr.hasNext()) {
-        fail("Reference queue has more values than implemented queue");
-      }
+      assertIterableEquals(reference, me, "Reference and implemented queues are not equal");
     }
   }
+  
 }
-
diff --git a/tests/edu/caltech/cs2/datastructures/LinkedDequeTests.java b/tests/edu/caltech/cs2/datastructures/LinkedDequeTests.java
index c6ba961..6a49821 100644
--- a/tests/edu/caltech/cs2/datastructures/LinkedDequeTests.java
+++ b/tests/edu/caltech/cs2/datastructures/LinkedDequeTests.java
@@ -13,10 +13,8 @@ import org.junit.jupiter.api.*;
 import org.junit.jupiter.params.ParameterizedTest;
 import org.junit.jupiter.params.provider.CsvSource;
 import org.junit.jupiter.params.provider.ValueSource;
-import org.junit.platform.engine.support.hierarchical.Node;
 
 import java.lang.reflect.Constructor;
-import java.sql.Ref;
 import java.util.*;
 import java.util.ArrayDeque;
 import java.util.function.Consumer;
@@ -29,7 +27,7 @@ import static org.junit.jupiter.api.Assertions.assertNull;
 @Tag("C")
 @TestMethodOrder(MethodOrderer.OrderAnnotation.class)
 public class LinkedDequeTests implements DequeTests, StackTests, QueueTests {
-  private static String LINKED_DEQUE_SOURCE ="src/edu/caltech/cs2/datastructures/LinkedDeque.java";
+  private static String LINKED_DEQUE_SOURCE = "src/edu/caltech/cs2/datastructures/LinkedDeque.java";
 
   private Constructor linkedDequeConstructor = Reflection.getConstructor(LinkedDeque.class);
 
@@ -92,26 +90,19 @@ public class LinkedDequeTests implements DequeTests, StackTests, QueueTests {
     Reflection.assertNoProtectedFields(LinkedDeque.class);
   }
 
+  @Order(classSpecificTestLevel)
+  @DisplayName("All fields in LinkedDeque have modifiers")
+  @Test
+  public void testFieldModifiers() {
+    Reflection.assertFieldModifiers(LinkedDeque.class);
+  }
+
   @Order(classSpecificTestLevel)
   @DisplayName("The public interface is correct")
   @Test
   public void testPublicInterface() {
-    Reflection.assertPublicInterface(LinkedDeque.class, List.of(
-            "addFront",
-            "addBack",
-            "removeFront",
-            "removeBack",
-            "enqueue",
-            "dequeue",
-            "push",
-            "pop",
-            "peek",
-            "peekFront",
-            "peekBack",
-            "iterator",
-            "size",
-            "toString"
-    ));
+    Reflection.assertPublicInterface(LinkedDeque.class, List.of("addFront", "addBack", "removeFront", "removeBack",
+        "enqueue", "dequeue", "push", "pop", "peek", "peekFront", "peekBack", "iterator", "size", "toString"));
   }
 
   @Order(classSpecificTestLevel)
@@ -134,7 +125,6 @@ public class LinkedDequeTests implements DequeTests, StackTests, QueueTests {
     }
   }
 
-
   // TOSTRING TESTS ---------------------------------------------------
 
   @Order(toStringTestLevel)
@@ -147,9 +137,7 @@ public class LinkedDequeTests implements DequeTests, StackTests, QueueTests {
   @Order(toStringTestLevel)
   @DisplayName("toString() matches java.util.ArrayDeque")
   @ParameterizedTest(name = "Test toString() on [{arguments}]")
-  @ValueSource(strings = {
-          "0, 1, 2, 3", "5, 4, 3, 2, 1", "8, 3, 5, 7, 4, 3, 12, 12, 1"
-  })
+  @ValueSource(strings = { "0, 1, 2, 3", "5, 4, 3, 2, 1", "8, 3, 5, 7, 4, 3, 12, 12, 1" })
   public void testToString(String inputs) {
     java.util.ArrayDeque<String> reference = new java.util.ArrayDeque<String>();
     LinkedDeque<String> me = new LinkedDeque<>();
@@ -176,8 +164,10 @@ public class LinkedDequeTests implements DequeTests, StackTests, QueueTests {
     Consumer<IDeque<Integer>> addFront = (IDeque<Integer> q) -> q.addFront(0);
     Consumer<IDeque<Integer>> removeFront = (IDeque<Integer> q) -> q.removeFront();
 
-    RuntimeInstrumentation.assertAtMost("addFront", RuntimeInstrumentation.ComplexityType.CONSTANT, provide, addFront, 8);
-    RuntimeInstrumentation.assertAtMost("removeFront", RuntimeInstrumentation.ComplexityType.CONSTANT, provide, removeFront, 8);
+    RuntimeInstrumentation.assertAtMost("addFront", RuntimeInstrumentation.ComplexityType.CONSTANT, provide, addFront,
+        8);
+    RuntimeInstrumentation.assertAtMost("removeFront", RuntimeInstrumentation.ComplexityType.CONSTANT, provide,
+        removeFront, 8);
   }
 
   @Order(complexityTestLevel)
@@ -195,7 +185,8 @@ public class LinkedDequeTests implements DequeTests, StackTests, QueueTests {
     Consumer<IDeque<Integer>> removeBack = (IDeque<Integer> q) -> q.removeBack();
 
     RuntimeInstrumentation.assertAtMost("addBack", RuntimeInstrumentation.ComplexityType.CONSTANT, provide, addBack, 8);
-    RuntimeInstrumentation.assertAtMost("removeBack", RuntimeInstrumentation.ComplexityType.CONSTANT, provide, removeBack, 8);
+    RuntimeInstrumentation.assertAtMost("removeBack", RuntimeInstrumentation.ComplexityType.CONSTANT, provide,
+        removeBack, 8);
   }
 
   @Order(complexityTestLevel)
@@ -263,7 +254,8 @@ public class LinkedDequeTests implements DequeTests, StackTests, QueueTests {
     };
     Consumer<IDeque<Integer>> peekFront = (IDeque<Integer> q) -> q.peekFront();
 
-    RuntimeInstrumentation.assertAtMost("peekFront", RuntimeInstrumentation.ComplexityType.CONSTANT, provide, peekFront, 8);
+    RuntimeInstrumentation.assertAtMost("peekFront", RuntimeInstrumentation.ComplexityType.CONSTANT, provide, peekFront,
+        8);
   }
 
   @Order(complexityTestLevel)
@@ -279,15 +271,14 @@ public class LinkedDequeTests implements DequeTests, StackTests, QueueTests {
     };
     Consumer<IDeque<Integer>> peekBack = (IDeque<Integer> q) -> q.peekBack();
 
-    RuntimeInstrumentation.assertAtMost("peekBack", RuntimeInstrumentation.ComplexityType.CONSTANT, provide, peekBack, 8);
+    RuntimeInstrumentation.assertAtMost("peekBack", RuntimeInstrumentation.ComplexityType.CONSTANT, provide, peekBack,
+        8);
   }
 
   @Order(dequeTestLevel)
   @DisplayName("Cycle detection for addFront(...) and addBack(...)")
   @ParameterizedTest(name = "Test cycles {1} random numbers with seed = {0}")
-  @CsvSource({
-          "69, 200", "20, 300"
-  })
+  @CsvSource({ "69, 2000", "20, 3000" })
   public void checkForCycles(int seed, int size) {
     Random r = new Random(seed);
     Deque<Object> reference = new ArrayDeque<>();
@@ -300,11 +291,19 @@ public class LinkedDequeTests implements DequeTests, StackTests, QueueTests {
       if (num % 2 == 0) {
         reference.addLast(num);
         impl.addBack(num);
-      }
-      else {
+      } else {
         reference.addFirst(num);
         impl.addFront(num);
       }
+      if (reference.size() > 1 && impl.size() > 1) {
+        if (num % 3 == 0) {
+          reference.removeFirst();
+          impl.removeFront();
+        } else if (num % 4 == 0) {
+          reference.removeLast();
+          impl.removeBack();
+        }
+      }
       NodeChecker.cycleDetection(impl, true);
       assertEquals(reference.size(), impl.size(), "size()s are not equal");
       assertEquals(reference.toString(), impl.toString(), "toStrings()s are not equal");
@@ -314,9 +313,7 @@ public class LinkedDequeTests implements DequeTests, StackTests, QueueTests {
   @Order(dequeTestLevel)
   @DisplayName("Check reverses for addFront(...) and addBack(...)")
   @ParameterizedTest(name = "Test reverse {1} random numbers with seed = {0}")
-  @CsvSource({
-          "31, 200", "64, 300"
-  })
+  @CsvSource({ "31, 2000", "64, 3000" })
   public void checkReverses(int seed, int size) {
     Random r = new Random(seed);
     Deque<Object> reference = new ArrayDeque<>();
@@ -329,15 +326,23 @@ public class LinkedDequeTests implements DequeTests, StackTests, QueueTests {
       if (num % 2 == 0) {
         reference.addLast(num);
         impl.addBack(num);
-      }
-      else {
+      } else {
         reference.addFirst(num);
         impl.addFront(num);
       }
+      if (reference.size() > 1 && impl.size() > 1) {
+        if (num % 3 == 0) {
+          reference.removeFirst();
+          impl.removeFront();
+        } else if (num % 4 == 0) {
+          reference.removeLast();
+          impl.removeBack();
+        }
+      }
       NodeChecker.checkReverse(impl);
       assertEquals(reference.size(), impl.size(), "size()s are not equal");
       assertEquals(reference.toString(), impl.toString(), "toStrings()s are not equal");
     }
   }
 
-}
+}
\ No newline at end of file
diff --git a/tests/edu/caltech/cs2/helpers/NodeChecker.java b/tests/edu/caltech/cs2/helpers/NodeChecker.java
index cd538f7..56cbb79 100644
--- a/tests/edu/caltech/cs2/helpers/NodeChecker.java
+++ b/tests/edu/caltech/cs2/helpers/NodeChecker.java
@@ -4,18 +4,17 @@ import java.lang.reflect.Constructor;
 import java.lang.reflect.Field;
 import java.lang.reflect.Modifier;
 
-import java.util.Iterator;
-import java.util.SortedSet;
-import java.util.TreeSet;
-import java.util.List;
-import java.util.ArrayList;
+import java.util.*;
 import java.util.stream.Collectors;
 import java.util.stream.Stream;
 
+import static org.junit.jupiter.api.Assertions.assertEquals;
 import static org.junit.jupiter.api.Assertions.fail;
 
-import edu.caltech.cs2.interfaces.IDeque;
+import static org.hamcrest.MatcherAssert.assertThat;
+import org.hamcrest.collection.IsIterableContainingInOrder;
 
+import edu.caltech.cs2.interfaces.IDeque;
 
 /**
  * @author Archie Shahidullah <archie@caltech.edu>
@@ -55,6 +54,7 @@ public class NodeChecker {
                 f.setAccessible(true);
             } catch (NoSuchFieldException ex) {
                 ex.printStackTrace();
+                fail();
             }
 
             if (f.getType().toString().equals("class " + clazz.getTypeName())) {
@@ -124,6 +124,7 @@ public class NodeChecker {
                 isNode(Class.forName(className), doublyLinked);
             } catch (ClassNotFoundException ex) {
                 ex.printStackTrace();
+                fail();
             } catch (AssertionError e) {
                 continue;
             }
@@ -134,6 +135,13 @@ public class NodeChecker {
         }
     }
 
+    /**
+     * This method gets a valid, internal node class from a given class.
+     *
+     * @param clazz the class you want to check
+     * @param doublyLinked whether or not the list <em>can</em> be doubly linked
+     * @return the node class
+     */
     public static Class getNodeClass(Class clazz, boolean doublyLinked) {
         Class[] classes = clazz.getDeclaredClasses();
         for (Class c : classes) {
@@ -150,6 +158,13 @@ public class NodeChecker {
         return null;
     }
 
+    /**
+     * This method gets fields of specified type from a given class.
+     *
+     * @param clazz the class you want to check
+     * @param type the type of field you want
+     * @return a list of fields matching the given type
+     */
     public static List<Field> getFields(Class clazz, Class type) {
         Field[] fields = clazz.getDeclaredFields();
         List<Field> namedFields = new ArrayList<>();
@@ -162,14 +177,27 @@ public class NodeChecker {
         return namedFields;
     }
 
+    /**
+     * This method checks whether a given pointer permutation in a deque contains a cycle.
+     *
+     * @param deque the deque you want to check
+     * @param nextField the field corresponding to the next pointer in a linked node
+     * @param dequeField the field corresponding to the head pointer in a linked deque
+     * @param <E> the generic type of the data field in a linked node
+     * @return an array containing the indices of the cyclic nodes
+     */
     public static <E> int[] checkCycle(IDeque<E> deque, Field nextField, Field dequeField) {
+        // Grab head of list
         Object head = null;
         try {
             head = dequeField.get(deque);
         } catch (IllegalAccessException ex) {
             ex.printStackTrace();
+            fail();
         }
+        // Create array to store all nodes
         Object[] nodes = new Object[deque.size() + 1];
+        // Iterate through list
         Object temp = head;
         int i = 0;
         while (temp != null) {
@@ -177,84 +205,125 @@ public class NodeChecker {
             for (int j = 0; j < i; j++) {
                 // Check if memory locations are equal
                 if (nodes[j] == nodes[i]) {
+                    // Return indices of nodes that create a cycle
                     return new int[] {i, j};
                 }
             }
             try {
+                // Next node
                 temp = nextField.get(temp);
             } catch (IllegalAccessException ex) {
                 ex.printStackTrace();
+                fail();
             }
             i++;
         }
+        // No cycle
         return new int[] {-1, -1};
     }
 
+    /**
+     * This method checks whether a given deque contains a cycle.
+     *
+     * @param deque the deque you want to check
+     * @param doublyLinked whether or not the list <em>can</em> be doubly linked
+     * @param <E> the generic type of the data field in a linked node
+     */
     public static <E> void cycleDetection(IDeque<E> deque, boolean doublyLinked) {
         Class nodeClass = getNodeClass(deque.getClass(), doublyLinked);
         // Can be either next or previous pointer
         List<Field> nextFields = getFields(nodeClass, nodeClass);
         // Can be either head or tail pointer
         List<Field> dequeFields = getFields(deque.getClass(), nodeClass);
-
-        int[] nodes = {0, 0};
-        int flag = -1;
-        loop:
+        // Check all permutations of pointers
+        int[] nodes;
         for (Field nextField : nextFields) {
             for (Field dequeField : dequeFields) {
+                // Check for a cycle
                 nodes = checkCycle(deque, nextField, dequeField);
                 if (nodes[0] == -1 && nodes[1] == -1) {
-                    flag = 0;
+                    // No cycle
+                    continue;
                 }
-                else if (nodes[0] == deque.size() && nodes[1] == 0) {
-                    flag = 1;
-                    break loop;
+                if (nodes[0] == deque.size() && nodes[1] == 0) {
+                    fail("The last node is connected to the first node in " +
+                                nodeClass.getName() + " object");
                 }
                 else {
-                    flag = 2;
-                    break loop;
+                    fail("Node " + nodes[0] + " is connected to Node " + nodes[1] +
+                                " in " + nodeClass.getName() + " object");
                 }
             }
         }
-
-        switch (flag) {
-            case 0:
-                break;
-            case 1:
-                fail("The last node is connected to the first node in " +
-                        nodeClass.getName() + " object");
-                break;
-            case 2:
-                fail("Node " + nodes[0] + " is connected to Node " + nodes[1] +
-                        " in " + nodeClass.getName() + " object");
-                break;
-            default:
-                fail("Unexpected error in " + nodeClass.getName() + " object!");
-        }
     }
 
+    /**
+     * This method checks whether iterating through a list forwards and backwards returns the same values.
+     *
+     * @param deque the deque you want to check
+     * @param <E> the generic type of the data field in a linked node
+     */
     public static <E> void checkReverse(IDeque<E> deque) {
-        Iterator<E> iter = deque.iterator();
-        List<E> forwardValues = new ArrayList<>();
-        while (iter.hasNext()) {
-            forwardValues.add(iter.next());
-        }
-        iter = deque.iterator();
-        List<E> backwardsValues = new ArrayList<>();
-        while (iter.hasNext()) {
-            backwardsValues.add(0, iter.next());
-        }
-        if (forwardValues.size() != backwardsValues.size()) {
-            fail("Forwards and backwards value lists of " + deque.getClass().getName() +
-                    " object do not have the same size");
-        }
-        for (int i = 0; i < forwardValues.size(); i++) {
-            if (!forwardValues.get(i).equals(backwardsValues.get(backwardsValues.size() - i - 1))) {
-                fail("Forwards and backwards value lists of " + deque.getClass().getName() +
-                        " object do not agree at indices " + i + " and " +
-                        (backwardsValues.size() - i - 1) + " respectively");
+        // Grab the linked node class and possible pointers to the head and tail
+        Class nodeClass = getNodeClass(deque.getClass(), true);
+        List<Field> dequePointers = getFields(deque.getClass(), nodeClass);
+        assertEquals(2, dequePointers.size(), "List does not have one head and tail pointer");
+        // The tests should pass only twice (head/next and tail/previous combinations)
+        int flag = 2;
+        // Try all permutations of pointers
+        try {
+            for (int i = 0; i < 2; i++) {
+                // Get trial head and tail pointers
+                Field headField = dequePointers.get(i);
+                Field tailField = dequePointers.get((i + 1) % 2);
+                Object head = headField.get(deque);
+                Object tail = tailField.get(deque);
+                // If deque size is one, tests will fail so check alternative
+                if (deque.size() == 1) {
+                    assertEquals(head, tail, "Deque of size 1 does not have same head and tail");
+                    return;
+                }
+                // Grab possible next and previous pointers
+                List<Field> pointers = getFields(head.getClass(), nodeClass);
+                assertEquals(2, pointers.size(), "List is not doubly linked");
+                for (int j = 0; j < 2; j++) {
+                    // Get trial next and previous pointers
+                    Field next = pointers.get(j);
+                    Field prev = pointers.get((j + 1) % 2);
+                    // Get data field
+                    List<Field> dataFields = getFields(nodeClass, Object.class);
+                    assertEquals(1, dataFields.size(), "Incorrect number of generic types in node class");
+                    Field data = dataFields.get(0);
+                    // Iterate through linked list and construct value lists
+                    List<E> forwardValues = new ArrayList<>();
+                    List<E> backwardValues = new ArrayList<>();
+                    Object temp = head;
+                    while (temp != null) {
+                        forwardValues.add((E) data.get(temp));
+                        temp = next.get(temp);
+                    }
+                    temp = tail;
+                    while (temp != null) {
+                        backwardValues.add((E) data.get(temp));
+                        temp = prev.get(temp);
+                    }
+                    Collections.reverse(backwardValues);
+                    try {
+                        // Assert the reverse of the backwards equals the forwards
+                        assertThat(backwardValues,
+                                IsIterableContainingInOrder.contains(forwardValues.toArray()));
+                    } catch (AssertionError e) {
+                        // Mark failed test
+                        flag--;
+                    }
+                }
             }
+        } catch (IllegalAccessException ex) {
+            ex.printStackTrace();
+            fail();
         }
+        // A flag of zero indicates success as it passed twice
+        assertEquals(0, flag, "Forwards and backwards lists of values do not agree");
     }
 
 }
diff --git a/tests/edu/caltech/cs2/helpers/Reflection.java b/tests/edu/caltech/cs2/helpers/Reflection.java
index ed4355a..1f4b950 100644
--- a/tests/edu/caltech/cs2/helpers/Reflection.java
+++ b/tests/edu/caltech/cs2/helpers/Reflection.java
@@ -5,6 +5,7 @@ import java.util.*;
 import java.util.function.*;
 import java.util.stream.*;
 
+import static org.junit.jupiter.api.Assertions.assertTrue;
 import static org.junit.jupiter.api.Assertions.fail;
 
 public class Reflection {
@@ -40,7 +41,9 @@ public class Reflection {
       c.setAccessible(true);
     } catch (NoSuchMethodException e) {
       e.printStackTrace();
-      fail("Could not find constructor " + clazz.getName() + "(" + String.join(", ", (String[])Stream.of(params).map(x -> x.getName()).collect(Collectors.toList()).toArray()) + ")" + " in class " + clazz.getName());
+      fail("Could not find constructor " + clazz.getName() + "("
+          + String.join(", ", (String[]) Stream.of(params).map(x -> x.getName()).collect(Collectors.toList()).toArray())
+          + ")" + " in class " + clazz.getName());
       return null;
     }
     return c;
@@ -56,7 +59,6 @@ public class Reflection {
     return result;
   }
 
-
   public static <T> T invokeStatic(Method m, Object... args) {
     T result = null;
     try {
@@ -83,12 +85,18 @@ public class Reflection {
 
   private static int stringToIntModifier(String modifier) {
     switch (modifier.toLowerCase()) {
-      case "private": return Modifier.PRIVATE;
-      case "public": return Modifier.PUBLIC;
-      case "protected": return Modifier.PROTECTED;
-      case "static": return Modifier.STATIC;
-      case "final": return Modifier.FINAL;
-      default: fail("Unknown modifier test.");
+      case "private":
+        return Modifier.PRIVATE;
+      case "public":
+        return Modifier.PUBLIC;
+      case "protected":
+        return Modifier.PROTECTED;
+      case "static":
+        return Modifier.STATIC;
+      case "final":
+        return Modifier.FINAL;
+      default:
+        fail("Unknown modifier test.");
     }
     /* Should never reach here... */
     return -1;
@@ -111,17 +119,21 @@ public class Reflection {
   }
 
   public static void assertFieldsLessThan(Class clazz, Class FieldType, int x) {
-    assertFieldsLessThan(clazz, null, FieldType, x );
+    assertFieldsLessThan(clazz, null, FieldType, x);
   }
+
   public static void assertFieldsLessThan(Class clazz, String modifier, int x) {
     assertFieldsLessThan(clazz, modifier, null, x);
   }
+
   public static void assertFieldsLessThan(Class clazz, Stream<Field> fields, int x) {
-    assertFieldsLessThan(clazz, fields, null, null, x );
+    assertFieldsLessThan(clazz, fields, null, null, x);
   }
+
   public static void assertFieldsLessThan(Class clazz, String modifier, Class FieldType, int x) {
     assertFieldsLessThan(clazz, getFields(clazz), modifier, FieldType, x);
   }
+
   public static void assertFieldsLessThan(Class clazz, Stream<Field> fields, String modifier, Class FieldType, int x) {
     if (modifier != null) {
       fields = fields.filter(hasModifier(modifier)).filter(doesNotHaveModifier("static"));
@@ -131,27 +143,29 @@ public class Reflection {
     }
 
     if (fields.count() >= x) {
-      fail(clazz.getName() + " has too many fields" +
-              (modifier != null ? " with modifier " + modifier : "") + "" +
-              (FieldType != null ? " of type " + FieldType.getName() : "")
-      );
+      fail(clazz.getName() + " has too many fields" + (modifier != null ? " with modifier " + modifier : "") + ""
+          + (FieldType != null ? " of type " + FieldType.getName() : ""));
     }
   }
 
-
   public static void assertFieldsGreaterThan(Class clazz, Class FieldType, int x) {
-    assertFieldsGreaterThan(clazz, null, FieldType, x );
+    assertFieldsGreaterThan(clazz, null, FieldType, x);
   }
+
   public static void assertFieldsGreaterThan(Class clazz, String modifier, int x) {
     assertFieldsGreaterThan(clazz, modifier, null, x);
   }
+
   public static void assertFieldsGreaterThan(Class clazz, Stream<Field> fields, int x) {
-    assertFieldsGreaterThan(clazz, fields, null, null, x );
+    assertFieldsGreaterThan(clazz, fields, null, null, x);
   }
+
   public static void assertFieldsGreaterThan(Class clazz, String modifier, Class FieldType, int x) {
     assertFieldsGreaterThan(clazz, getFields(clazz), modifier, FieldType, x);
   }
-  public static void assertFieldsGreaterThan(Class clazz, Stream<Field> fields, String modifier, Class FieldType, int x) {
+
+  public static void assertFieldsGreaterThan(Class clazz, Stream<Field> fields, String modifier, Class FieldType,
+      int x) {
     if (modifier != null) {
       fields = fields.filter(hasModifier(modifier));
     }
@@ -160,26 +174,27 @@ public class Reflection {
     }
 
     if (fields.count() <= x) {
-      fail(clazz.getName() + " has too few fields" +
-              (modifier != null ? " with modifier " + modifier : "") + " " +
-              (FieldType != null ? " of type " + FieldType.getName() : "")
-      );
+      fail(clazz.getName() + " has too few fields" + (modifier != null ? " with modifier " + modifier : "") + " "
+          + (FieldType != null ? " of type " + FieldType.getName() : ""));
     }
   }
 
-
   public static void assertFieldsEqualTo(Class clazz, Class FieldType, int x) {
-    assertFieldsEqualTo(clazz, null, FieldType, x );
+    assertFieldsEqualTo(clazz, null, FieldType, x);
   }
+
   public static void assertFieldsEqualTo(Class clazz, String modifier, int x) {
-    assertFieldsEqualTo(clazz, modifier, null, x );
+    assertFieldsEqualTo(clazz, modifier, null, x);
   }
+
   public static void assertFieldsEqualTo(Class clazz, Stream<Field> fields, int x) {
-    assertFieldsEqualTo(clazz, fields, null, null, x );
+    assertFieldsEqualTo(clazz, fields, null, null, x);
   }
+
   public static void assertFieldsEqualTo(Class clazz, String modifier, Class FieldType, int x) {
     assertFieldsEqualTo(clazz, getFields(clazz), modifier, FieldType, x);
   }
+
   public static void assertFieldsEqualTo(Class clazz, Stream<Field> fields, String modifier, Class FieldType, int x) {
     if (modifier != null) {
       fields = fields.filter(hasModifier(modifier));
@@ -189,21 +204,26 @@ public class Reflection {
     }
 
     if (fields.count() != x) {
-      fail(clazz.getName() + " has the wrong number of fields" +
-              (modifier != null ? " with modifier " + modifier : "") + " " +
-              (FieldType != null ? " of type " + FieldType.getName() : "")
-      );
+      fail(clazz.getName() + " has the wrong number of fields" + (modifier != null ? " with modifier " + modifier : "")
+          + " " + (FieldType != null ? " of type " + FieldType.getName() : ""));
     }
   }
 
   public static void assertNoPublicFields(Class clazz) {
-    assertFieldsEqualTo(clazz, getFields(clazz).filter(doesNotHaveModifier("static")),
-            "public", null, 0);
+    assertFieldsEqualTo(clazz, getFields(clazz).filter(doesNotHaveModifier("static")), "public", null, 0);
   }
 
   public static void assertNoProtectedFields(Class clazz) {
-    assertFieldsEqualTo(clazz, getFields(clazz).filter(doesNotHaveModifier("static")),
-            "protected", null, 0);
+    assertFieldsEqualTo(clazz, getFields(clazz).filter(doesNotHaveModifier("static")), "protected", null, 0);
+  }
+
+  public static void assertFieldModifiers(Class clazz) {
+    List<Field> fields = getFields(clazz).collect(Collectors.toList());
+    for (Field f : fields) {
+      int m = f.getModifiers();
+      assertTrue(Modifier.isPrivate(m) || Modifier.isProtected(m) || Modifier.isPublic(m),
+          "Field \"" + f.getName() + "\" does not have one of {public, private, protected}");
+    }
   }
 
   public static Field getFieldByName(Class clazz, String name) {
@@ -220,20 +240,13 @@ public class Reflection {
     Stream<Field> fields = getFields(clazz).filter(hasType(FieldType)).filter(doesNotHaveModifier("static"));
     List<Field> fieldsList = fields.collect(Collectors.toList());
     if (fieldsList.isEmpty()) {
-      fail(clazz.getName() +
-              " should have a field with the type '" + FieldType.getName() +
-              "', but does not."
-      );
+      fail(clazz.getName() + " should have a field with the type '" + FieldType.getName() + "', but does not.");
       // Should not reach here!
       return null;
     }
 
     if (fieldsList.size() > 1) {
-      fail(clazz.getName() +
-              " should only have one field with the type '" +
-              FieldType.getName() +
-              "', but has more."
-      );
+      fail(clazz.getName() + " should only have one field with the type '" + FieldType.getName() + "', but has more.");
       // Should not reach here
       return null;
     }
@@ -245,20 +258,13 @@ public class Reflection {
     Stream<Field> fields = getFields(clazz).filter(hasType(FieldType));
     List<Field> fieldsList = fields.collect(Collectors.toList());
     if (fieldsList.isEmpty()) {
-      fail(clazz.getName() +
-              " should have a field with the type '" + FieldType.getName() +
-              "', but does not."
-      );
+      fail(clazz.getName() + " should have a field with the type '" + FieldType.getName() + "', but does not.");
       // Should not reach here!
       return null;
     }
 
     if (fieldsList.size() > 1) {
-      fail(clazz.getName() +
-              " should only have one field with the type '" +
-              FieldType.getName() +
-              "', but has more."
-      );
+      fail(clazz.getName() + " should only have one field with the type '" + FieldType.getName() + "', but has more.");
       // Should not reach here
       return null;
     }
@@ -277,21 +283,15 @@ public class Reflection {
     }
     List<Field> fieldsList = fields.collect(Collectors.toList());
     if (fieldsList.isEmpty()) {
-      fail(clazz.getName() +
-              " should have a field with the modifiers '" +
-              String.join(", ", modifiers) +
-              "', but does not."
-      );
+      fail(clazz.getName() + " should have a field with the modifiers '" + String.join(", ", modifiers)
+          + "', but does not.");
       // Should not reach here!
       return null;
     }
 
     if (fieldsList.size() > 1) {
-      fail(clazz.getName() +
-              " should only have one field with the modifiers '" +
-              String.join(", ", modifiers) +
-              "', but has more."
-      );
+      fail(clazz.getName() + " should only have one field with the modifiers '" + String.join(", ", modifiers)
+          + "', but has more.");
       // Should not reach here
       return null;
     }
@@ -302,6 +302,7 @@ public class Reflection {
   public static void checkFieldModifiers(Field f, String modifier) {
     checkFieldModifiers(f, List.of(modifier));
   }
+
   public static void checkFieldModifiers(Field f, List<String> modifiers) {
     if (!modifiers.stream().allMatch(m -> hasModifier(m).test(f))) {
       fail(f.getName() + " is missing at least one of the modifiers: " + String.join(", ", modifiers));
@@ -310,10 +311,8 @@ public class Reflection {
 
   public static void assertPublicInterface(Class clazz, List<String> methods) {
     SortedSet<String> expected = new TreeSet<>(methods);
-    SortedSet<String> actual = new TreeSet<>(Stream.of(clazz.getDeclaredMethods())
-            .filter(hasModifier("public"))
-            .map(x -> x.getName())
-            .collect(Collectors.toList()));
+    SortedSet<String> actual = new TreeSet<>(Stream.of(clazz.getDeclaredMethods()).filter(hasModifier("public"))
+        .map(x -> x.getName()).collect(Collectors.toList()));
     if (!expected.equals(actual)) {
       String diff = "expected: " + expected + "\nactual:  " + actual;
       fail("The public interface of " + clazz.getName() + " has incorrect functionality.\n" + diff);
@@ -327,4 +326,5 @@ public class Reflection {
       fail("You should be overriding the " + method + "method, but your signature wasn't correct.");
     }
   }
+  
 }
diff --git a/tests/edu/caltech/cs2/project03/GuitarStringTests.java b/tests/edu/caltech/cs2/project03/GuitarStringTests.java
index accfc43..81fabe0 100644
--- a/tests/edu/caltech/cs2/project03/GuitarStringTests.java
+++ b/tests/edu/caltech/cs2/project03/GuitarStringTests.java
@@ -35,7 +35,8 @@ public class GuitarStringTests {
   }
 
   public static IFixedSizeQueue<Double> getQueueFromString(CircularArrayFixedSizeQueueGuitarString string) {
-    String queueName = Reflection.getFieldByType(CircularArrayFixedSizeQueueGuitarString.class, IFixedSizeQueue.class).getName();
+    String queueName = Reflection.getFieldByType(CircularArrayFixedSizeQueueGuitarString.class, IFixedSizeQueue.class)
+        .getName();
     return Reflection.getFieldValue(CircularArrayFixedSizeQueueGuitarString.class, queueName, string);
   }
 
@@ -63,7 +64,8 @@ public class GuitarStringTests {
     Stream<Field> fields = Reflection.getFields(CircularArrayFixedSizeQueueGuitarString.class);
     fields.filter(Reflection.hasModifier("static")).forEach((field) -> {
       Reflection.checkFieldModifiers(field, List.of("private", "static"));
-      assertTrue(Reflection.hasModifier("final").test(field) || field.getType().equals(Random.class), "non-final static class must be a random value generator");
+      assertTrue(Reflection.hasModifier("final").test(field) || field.getType().equals(Random.class),
+          "non-final static class must be a random value generator");
     });
   }
 
@@ -88,28 +90,25 @@ public class GuitarStringTests {
     Reflection.assertNoProtectedFields(CircularArrayFixedSizeQueueGuitarString.class);
   }
 
+  @Order(classSpecificTestLevel)
+  @DisplayName("All fields in CircularArrayFixedSizeQueueGuitarString have modifiers")
+  @Test
+  public void testFieldModifiers() {
+    Reflection.assertFieldModifiers(CircularArrayFixedSizeQueueGuitarString.class);
+  }
+
   @Order(classSpecificTestLevel)
   @DisplayName("The public interface is correct")
   @Test
   public void testPublicInterface() {
-    Reflection.assertPublicInterface(CircularArrayFixedSizeQueueGuitarString.class, List.of(
-            "length",
-            "pluck",
-            "tic",
-            "sample"
-    ));
+    Reflection.assertPublicInterface(CircularArrayFixedSizeQueueGuitarString.class,
+        List.of("length", "pluck", "tic", "sample"));
   }
 
   @Order(classSpecificTestLevel)
   @DisplayName("The constructor correctly sets up the queue")
   @ParameterizedTest(name = "Test constructor with CircularArrayFixedSizeQueue and a frequency of {0} Hz; expected queue size is {1}")
-  @CsvSource({
-          "110, 401",
-          "340, 130",
-          "512, 87",
-          "600.5, 74",
-          "880, 51"
-  })
+  @CsvSource({ "110, 401", "340, 130", "512, 87", "600.5, 74", "880, 51" })
   public void testConstructor(double frequency, int expectedSize) {
     CircularArrayFixedSizeQueueGuitarString string = constructGuitarString(frequency);
     IFixedSizeQueue<Double> queue = getQueueFromString(string);
@@ -123,42 +122,32 @@ public class GuitarStringTests {
   @Order(guitarStringTestLevel)
   @DisplayName("The pluck() method randomizes the values in the queue")
   @ParameterizedTest(name = "Test pluck() with CircularArrayFixedSizeQueue and a frequency of {0} Hz")
-  @CsvSource({
-          "100",
-          "50",
-          "10",
-          "8",
-          "5"
-  })
+  @CsvSource({ "100", "50", "10", "8", "5" })
   public void testPluck(double frequency) {
     final double DELTA = 0.05;
     // Set up class and retrieve queue
     CircularArrayFixedSizeQueueGuitarString string = constructGuitarString(frequency);
     IFixedSizeQueue<Double> queue = getQueueFromString(string);
     // Checks all values are initially 0
-    for(double val : queue){
+    for (double val : queue) {
       assertEquals(0, val, "initial values must be 0");
     }
     string.pluck();
     queue = getQueueFromString(string);
     double sum = 0;
     double absSum = 0;
-    for(double val : queue){
+    for (double val : queue) {
       sum += val;
       absSum += abs(val);
     }
-    assertEquals(0, sum/queue.size(), DELTA, "average value of uniform distribution should be near 0");
-    assertEquals(0.25, absSum/queue.size(), DELTA, "average magnitude of uniform distribution should be near 0.25");
+    assertEquals(0, sum / queue.size(), DELTA, "average value of uniform distribution should be near 0");
+    assertEquals(0.25, absSum / queue.size(), DELTA, "average magnitude of uniform distribution should be near 0.25");
   }
 
   @Order(guitarStringTestLevel)
   @DisplayName("The tic() method correctly applies the Karplus-Strong algorithm")
   @ParameterizedTest(name = "Test tic() with CircularArrayFixedSizeQueue and a frequency of {0} Hz; data file {1}.txt")
-  @CsvSource({
-          "10000, ticStates1",
-          "8000, ticStates2",
-          "5000, ticStates3"
-  })
+  @CsvSource({ "10000, ticStates1", "8000, ticStates2", "5000, ticStates3" })
   public void testTic(double frequency, String filename) {
     // Set up scanner
     String filepath = "tests/data/" + filename + ".txt";
@@ -172,13 +161,13 @@ public class GuitarStringTests {
     CircularArrayFixedSizeQueueGuitarString string = constructGuitarString(frequency);
     IFixedSizeQueue<Double> queue = getQueueFromString(string);
     // Reinitialize queue with new data
-    for(int i = 0; i < queue.size(); i++){
+    for (int i = 0; i < queue.size(); i++) {
       queue.dequeue();
       queue.enqueue(in.nextDouble());
     }
     int initSize = queue.size();
     // Pass through the same number of tics as elements in the array
-    for(int i = 0; i < initSize; i++){
+    for (int i = 0; i < initSize; i++) {
       string.tic();
       queue = getQueueFromString(string);
       assertEquals(initSize, queue.size(), "queue size must remain the same");
@@ -195,13 +184,7 @@ public class GuitarStringTests {
   @Order(guitarStringTestLevel)
   @DisplayName("The length() method correctly gives the length of the queue")
   @ParameterizedTest(name = "Test length() with CircularArrayFixedSizeQueue and a frequency of {0} Hz; expected length = {1}; iterations = {2}")
-  @CsvSource({
-          "110, 401, 1000",
-          "340, 130, 500",
-          "512, 87, 200",
-          "600.5, 74, 150",
-          "880, 51, 100"
-  })
+  @CsvSource({ "110, 401, 1000", "340, 130, 500", "512, 87, 200", "600.5, 74, 150", "880, 51, 100" })
   public void testLength(double frequency, int expectedLength, int iterations) {
     // Set up class and retrieve queue
     CircularArrayFixedSizeQueueGuitarString string = constructGuitarString(frequency);
@@ -216,7 +199,8 @@ public class GuitarStringTests {
     assertEquals(initSize, string.length(), "Length should not have changed from beginning");
     assertEquals(queue.size(), string.length(), "Length should be same as queue size");
 
-    // Run through many iterations, making sure both the queue size and length are constant
+    // Run through many iterations, making sure both the queue size and length are
+    // constant
     for (int i = 0; i < iterations; i++) {
       string.tic();
       queue = getQueueFromString(string);
@@ -229,13 +213,7 @@ public class GuitarStringTests {
   @Order(guitarStringTestLevel)
   @DisplayName("The sample() method gives the same values as peek()ing the queue")
   @ParameterizedTest(name = "Test sample() with CircularArrayFixedSizeQueue and a frequency of {0} Hz")
-  @CsvSource({
-          "110, 1000",
-          "340, 500",
-          "512, 200",
-          "600.5, 150",
-          "880, 100"
-  })
+  @CsvSource({ "110, 1000", "340, 500", "512, 200", "600.5, 150", "880, 100" })
   public void testSample(double frequency, int iterations) {
     // Set up class and retrieve queue
     CircularArrayFixedSizeQueueGuitarString string = constructGuitarString(frequency);
-- 
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