Write tests and code for each of the following requirements

Write tests and code for each of the following requirements, in order. The words in bold indicate message names. Whenever a requirement says the user can \"ask whether...\", the expected answer is boolean. Whenever a requirement speaks of a \"particular\" item, then that item will be an argument to the method. 1. The user can create an Association between a key and a value. The Association responds to a toString() message by returning a string of the form: [key]:[value] 2. The user can ask an Association whether its keyContains a particular substring. 3. The user can ask an Association whether its valueContains a particular substring. 4. The user can ask an Association whether it contains a particular substring in either its key or value. 5. The user can ask an Association whether it hasKey that is a particular string. 6. The user can create an AssociationList that contains no Associations. 7. The user can add an existing Association to an AssociationList. 8. The user can add a new Association to an AssociationList by sending a key and a value. 9. The user can ask an AssociationList whether it contains a particular Association. 10. The user can ask an AssociationList whether it containsKey for a particular key. 11. The user can ask an AssociationList to lookup a particular key, returning a ArrayList of the Associations it contains that have that key. 12. The user can ask an AssociationList to findAll matches for a particular string, returning a ArrayList containing all Associations that have that string anywhere in their key or value. 13. The user can ask an AssociationList to remove a particular Association. 14. The user can ask an AssociationList to update every Association having a particular key by appending a particular string to its value. You may not add so-called access methods to the Association class. That is, you may not add \"get\" or \"set\" methods, whose only behavior is to return a field\'s value or assign a field\'s value, respectively. I need these files for it: Part Two o AssociationTest.java o Association.java o AssociationListTest.java o AssociationList.java

Solution

Association.java

public class Association{
    String key;
    String value;

    public Association(String key, String value){
        this.key = key;
        this.value = value;
    }

    public String toString(){
        return \"[\"+this.key+\"]:[\"+this.value+\"]\";
    }

    public boolean keyContains(String substring){
        return this.key.contains(substring);
    }

    public boolean valueContains(String substring){
        return this.value.contains(substring);
    }

    public boolean keyOrValueContains(String substring){
        return this.key.contains(substring) || this.value.contains(substring);
    }

    public boolean hasKey(String key){
        return this.key.equals(key);
    }

}

AssociationList.java

import java.util.ArrayList;

public class AssociationList{
    ArrayList<Association> associationList;

    public AssociationList(){
        associationList = new ArrayList<Association>();
    }

    public void addAssociation(Association association){
        associationList.add(association);
    }

    public void addAssociation(String key, String value){
        associationList.add(new Association(key, value));
    }

    public boolean containsAssociation(Association association){
        return associationList.contains(association);
    }

    public boolean containsKey(String key){
        for (Association association: this.associationList){
            if (association.key.equals(key)){
                return true;
            }
        }
        return false;
    }

    public ArrayList associationsWithKey(String key){
        ArrayList<Association> associations = new ArrayList<Association>();

        for (Association association: this.associationList){
            if (association.key.equals(key)){
                associations.add(association);
            }
        }
        return associations;
    }

    public ArrayList<Association> associationsKeyOrValueContainsKey(String key){
        ArrayList<Association> associations = new ArrayList<Association>();

        for (Association association: this.associationList){
            if (association.key.contains(key)){
                associations.add(association);
            }
        }
        return associations;
    }

    public void removeAssociation(Association association){
        if (this.associationList.contains(association)){
            this.associationList.remove(association);
        }
    }

    public void updateAssociations(String key, String append){
        for (Association association: this.associationList){
            if (association.key.equals(key)){
                association.value = association.value + append;
            }
        }
    }

}

AssociationTest.java

public class AssociationTest{

    public static void main(String[] args) {
        Association association = new Association(\"key\", \"value\");
        System.out.println(association.keyContains(\"key\"));
        System.out.println(association.keyOrValueContains(\"val\"));
        System.out.println(association.hasKey(\"key\"));

    }
}

AssociationListTest.java

public class AssociationListTest{

    public static void main(String[] args) {
        Association association = new Association(\"key\", \"value\");
        System.out.println(association.keyContains(\"key\"));
        System.out.println(association.keyOrValueContains(\"val\"));
        System.out.println(association.hasKey(\"key\"));

        AssociationList associationList = new AssociationList();
        associationList.addAssociation(association);
        associationList.addAssociation(\"key2\", \"value2\");
        System.out.println(associationList.containsAssociation(association));
        System.out.println(associationList.containsKey(\"key3\"));

    }
}