Create a test file for Contact containing structural tests using the @Test annotation from JUnit.

a$.$ Create a setUpClass$()$ method with the @BeforeAll annotation that initializes a static testObj member of your test class.

b$.$ Use this testObj when writing tests for toString$(),$ equals$(),$ hashCode$()$ and the four setter methods.

c$.$ Finally create a provider called contactProvider$()$ that generates an Arbitrary object.

$6.$ Create a test file for AddressBook that has property$-$based test methods.

a$.$ Create testAdd$(),$ testRemove$()$ and testFind$()$using the @Property annotation. Each should execute $1000$ times and accept a provider $$listOfContacts$.$ Each method should create a FakeDBO object and use it to create an AddressBook to test.

b$.$ For testAdd$()$ loop through the passed in List of Contacts and perform the following:

i$.$ Get the list of matches for the contact in the AddressBook using find$().$

ii$.$ Add the Contact to the AddressBook.

iii. Confirm that the AddressBook find$()$ result is now one more than it was before the add.

c$.$ For testRemove$()$ loop through the passed in List of Contacts and add them to the AddressBook. Then loop again perform the following:

i$.$ Get the list of matches for the contact in the AddressBook using find$().$

ii$.$ Remove the Contact from the AddressBook.