Fancy Integer ArrayList (ONLY NEED HELP WITH WRITING TEST CASES) For example, we have defined a “testRemoveInt” method for you (see below) which tests the “remove” method. Pass the tests provided then write additional tests where it says “// TODO”. You’ll do this for each unit test method in the program. import static org.junit.jupiter.api.Assertions.*; import java.util.ArrayList; import org.junit.jupiter.api.Test; class CustomIntegerArrayListTest { @Test void testSpliceIntInt() { CustomIntegerArrayList arr1 = new CustomIntegerArrayList(); arr1.add(2); arr1.add(3); arr1.add(4); arr1.add(5); arr1.add(6); arr1.splice(3, 2); ArrayList lst1 = new ArrayList(); lst1.add(2); lst1.add(3); lst1.add(4); assertEquals((int) lst1.get(0), (int) arr1.get(0)); assertEquals((int) lst1.get(1), (int) arr1.get(1)); assertEquals((int) lst1.get(2), (int) arr1.get(2)); // TODO write at least 3 additional test cases } @Test void testSpliceIntIntIntArray() { CustomIntegerArrayList arr1 = new CustomIntegerArrayList(); arr1.add(2); arr1.add(3); arr1.add(4); arr1.add(5); arr1.add(6); arr1.splice(3, 1, new int[] { 4, 5 }); ArrayList lst1 = new ArrayList(); lst1.add(2); lst1.add(3); lst1.add(4); lst1.add(4); lst1.add(5); lst1.add(6); assertEquals(lst1, arr1.getArrayList()); // TODO write at least 3 additional test cases
Fancy Integer ArrayList (ONLY NEED HELP WITH WRITING TEST CASES) For example, we have defined a “testRemoveInt” method for you (see below) which tests the “remove” method. Pass the tests provided then write additional tests where it says “// TODO”. You’ll do this for each unit test method in the program. import static org.junit.jupiter.api.Assertions.*; import java.util.ArrayList; import org.junit.jupiter.api.Test; class CustomIntegerArrayListTest { @Test void testSpliceIntInt() { CustomIntegerArrayList arr1 = new CustomIntegerArrayList(); arr1.add(2); arr1.add(3); arr1.add(4); arr1.add(5); arr1.add(6); arr1.splice(3, 2); ArrayList lst1 = new ArrayList(); lst1.add(2); lst1.add(3); lst1.add(4); assertEquals((int) lst1.get(0), (int) arr1.get(0)); assertEquals((int) lst1.get(1), (int) arr1.get(1)); assertEquals((int) lst1.get(2), (int) arr1.get(2)); // TODO write at least 3 additional test cases } @Test void testSpliceIntIntIntArray() { CustomIntegerArrayList arr1 = new CustomIntegerArrayList(); arr1.add(2); arr1.add(3); arr1.add(4); arr1.add(5); arr1.add(6); arr1.splice(3, 1, new int[] { 4, 5 }); ArrayList lst1 = new ArrayList(); lst1.add(2); lst1.add(3); lst1.add(4); lst1.add(4); lst1.add(5); lst1.add(6); assertEquals(lst1, arr1.getArrayList()); // TODO write at least 3 additional test cases
Chapter9: Advanced Array Concepts
Section: Chapter Questions
Problem 19RQ
Related questions
Question
Fancy Integer ArrayList (ONLY NEED HELP WITH WRITING TEST CASES)
For example, we have defined a “testRemoveInt” method for you (see below) which tests the “remove” method. Pass the tests provided then write additional tests where it says “// TODO”. You’ll do this for each unit test method in the program.
import static org.junit.jupiter.api.Assertions.*;
import java.util.ArrayList;
import org.junit.jupiter.api.Test;
class CustomIntegerArrayListTest {
@Test
void testSpliceIntInt() {
CustomIntegerArrayList arr1 = new CustomIntegerArrayList();
arr1.add(2);
arr1.add(3);
arr1.add(4);
arr1.add(5);
arr1.add(6);
arr1.splice(3, 2);
ArrayList<Integer> lst1 = new ArrayList<Integer>();
lst1.add(2);
lst1.add(3);
lst1.add(4);
assertEquals((int) lst1.get(0), (int) arr1.get(0));
assertEquals((int) lst1.get(1), (int) arr1.get(1));
assertEquals((int) lst1.get(2), (int) arr1.get(2));
// TODO write at least 3 additional test cases
}
@Test
void testSpliceIntIntIntArray() {
CustomIntegerArrayList arr1 = new CustomIntegerArrayList();
arr1.add(2);
arr1.add(3);
arr1.add(4);
arr1.add(5);
arr1.add(6);
arr1.splice(3, 1, new int[] { 4, 5 });
ArrayList<Integer> lst1 = new ArrayList<Integer>();
lst1.add(2);
lst1.add(3);
lst1.add(4);
lst1.add(4);
lst1.add(5);
lst1.add(6);
assertEquals(lst1, arr1.getArrayList());
// TODO write at least 3 additional test cases
Transcribed Image Text:Homework 4: Fancy Integer ArrayList
This assignment is designed to give you practice writing code and applying lessons and
topics for the current module.
This homework deals with the following topics:
ArrayLists
Overloading
• Unit Testing
The Assignment
In this assignment, you will implement a class called Custom IntegerArrayList. This class
represents a fancy ArrayList that stores integers and supports additional operations not
included in Java's built-in ArrayList methods.
For example, the Custom IntegerArrayList class has a "splice" method which removes a
specified number of elements from the Custom IntegerArrayList, starting at a given index. For a
CustomIntegerArrayList that includes: 1, 2, 3, 4, and 5, calling splice(1, 2) will remove 2 items
starting at index 1. This will remove 2 and 3 (the 2nd and 3rd items).
The CustomIntegerArrayList class has 2 different (overloaded) constructors. (Remember, an
overloaded constructor is a constructor that has the same name, but a different number, type,
or sequence of parameters, as another constructor in the class.) Having 2 different
constructors means you can create an instance of the Custom IntegerArrayList class in 2
different ways, depending on which constructor you call. Both constructors have been
implemented for you. (See below)
Internally, the Custom IntegerArrayList class uses a private ArrayList variable named "arr" to
store its integer elements. The "CustomIntegerArrayList()" constructor initializes the ArrayList
variable "arr" as an empty ArrayList and the "CustomIntegerArrayList(ArrayList<Integer> arr)"
constructor initializes the ArrayList variable "arr" with the elements in the given ArrayList.
(Again, see below)
/**
* Fancy ArrayList that stores integers and supports additional
operations not included in Java's built-in ArrayList methods.
*/
![public class CustomIntegerArrayList {
// instance variables
/**
* Internal ArrayList of elements.
*/
private ArrayList<Integer> arr;
// constructors
/**
* Creates a new empty Custom IntegerArrayList.
*/
public Custom IntegerArrayList ()
}
this.arr = new ArrayList<Integer> ();
/**
* Creates a new Custom IntegerArrayList with the elements in
the given ArrayList.
*
@param arr with elements for the Custom IntegerArrayList
*/
public Custom IntegerArrayList (ArrayList<Integer> arr) {
this.arr = new ArrayList<Integer> (arr);
}
There are 8 (mostly overloaded) methods that need to be implemented in the
CustomIntegerArrayList class. (Again, an overloaded method is a method that has the same
name, but a different number, type, or sequence of parameters, as another method in the same
class.)
getArrayList() - Returns the elements.
•
get(int index) - Returns the element at the specified index from the elements.
add (int element) - Appends the given element to the end of the elements.
•
add (int index, int element) - Inserts the given element at the specified index.
remove(int index) - Removes the element at the specified index.
•
remove(int num, int element) - Removes the specified number of the given element
from all elements.
•
splice (int index, int num) - Removes the specified number of elements from all
elements, starting at the given index.
• splice (int index, int num, int[] otherArray) - Removes the specified number of elements
from all elements, starting at the given index, and inserts new elements in the given
array at the given index.](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Feda5bfed-6ef3-495e-84a7-318d55d37402%2F568adc8c-f88c-411a-8566-02705798111f%2F7nof0jj_processed.png&w=3840&q=75)
Transcribed Image Text:public class CustomIntegerArrayList {
// instance variables
/**
* Internal ArrayList of elements.
*/
private ArrayList<Integer> arr;
// constructors
/**
* Creates a new empty Custom IntegerArrayList.
*/
public Custom IntegerArrayList ()
}
this.arr = new ArrayList<Integer> ();
/**
* Creates a new Custom IntegerArrayList with the elements in
the given ArrayList.
*
@param arr with elements for the Custom IntegerArrayList
*/
public Custom IntegerArrayList (ArrayList<Integer> arr) {
this.arr = new ArrayList<Integer> (arr);
}
There are 8 (mostly overloaded) methods that need to be implemented in the
CustomIntegerArrayList class. (Again, an overloaded method is a method that has the same
name, but a different number, type, or sequence of parameters, as another method in the same
class.)
getArrayList() - Returns the elements.
•
get(int index) - Returns the element at the specified index from the elements.
add (int element) - Appends the given element to the end of the elements.
•
add (int index, int element) - Inserts the given element at the specified index.
remove(int index) - Removes the element at the specified index.
•
remove(int num, int element) - Removes the specified number of the given element
from all elements.
•
splice (int index, int num) - Removes the specified number of elements from all
elements, starting at the given index.
• splice (int index, int num, int[] otherArray) - Removes the specified number of elements
from all elements, starting at the given index, and inserts new elements in the given
array at the given index.
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