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); -- GitLab