Phonebook composed

src/main/java/com/zipcodewilmington/phonebook/PhoneBook.java

@@ -1,7 +1,55 @@
 package com.zipcodewilmington.phonebook;
 
+import java.util.HashMap;
+import java.util.Map;
+
+import static javax.swing.UIManager.put;
+
 /**
  * Created by leon on 1/23/18.
+ * https://git.zipcode.rocks/Cohort4.2/CR-MicroLabs-Composition-PhoneBook
  */
 public class PhoneBook {
-}
+
+    private HashMap<String, String> listings  = new HashMap<>();
+
+    PhoneBook() {}
+
+    public int getEntryCount() {
+        return listings.size();
+    }
+
+    public boolean hasEntry(String name) {
+        if (listings.get(name) == null) { return false; }
+        return true;
+    }
+
+    public void  add(String name, String phoneNumber) {
+//        adds an entry to the composite associate data type
+        listings.put(name, phoneNumber);
+    }
+
+    public String lookup(String name) {
+//        returns a phone number for the respective input name
+        return listings.get(name);
+    }
+
+    public void remove(String name) {
+//        removes an entry to the composite associate data type
+        listings.remove(name);
+    }
+
+    public String reverseLookup(String phonenumber) {
+//        returns a name for the respective input phoneNumber
+        return listings.entrySet().stream()
+                .filter(entry -> phonenumber.equals(entry.getValue()))
+                .map(Map.Entry::getKey)
+                .findFirst().get();
+    }
+
+    public void listNamesAndNumbers() {
+//        return a human-readable list of all entries (names and phone numbers) in alphabetical order.
+//        Format should be [name] [phone number]
+        listings.forEach((k,v) -> System.out.println(k + " " + v));
+    }
+}

src/test/java/com/zipcodewilmington/phonebook/PhoneBookTest.java

@@ -1,7 +1,79 @@
 package com.zipcodewilmington.phonebook;
 
+import org.junit.Assert;
+import org.junit.Before;
+import org.junit.Test;
+
 /**
  * Created by leon on 1/23/18.
+ * https://git.zipcode.rocks/Cohort4.2/CR-MicroLabs-Composition-PhoneBook
  */
 public class PhoneBookTest {
+    String testName;
+    String testNumber;
+
+    @Before
+    public void setup() {
+        testName = "Test Testmond";
+        testNumber = "302-299-6553";
+    }
+
+    @Test
+    public void  addTest() {
+//        adds an entry to the composite associate data type
+        PhoneBook app = new PhoneBook();
+
+        double before = app.getEntryCount();
+
+        app.add(testName, testNumber);
+
+        double after = app.getEntryCount();
+
+        Assert.assertTrue((before + 1) == after);
+    }
+
+    @Test
+    public void hasEntryTest() {
+        PhoneBook app = new PhoneBook();
+
+        app.add(testName, testNumber);
+        Assert.assertTrue(app.hasEntry(testName));
+    }
+
+    @Test
+    public void lookupTest() {
+        PhoneBook app = new PhoneBook();
+
+        app.add(testName, testNumber);
+        Assert.assertTrue(app.lookup(testName).equals(testNumber));
+    }
+
+    @Test
+    public void removeTest() {
+        PhoneBook app = new PhoneBook();
+//        removes an entry to the composite associate data type
+        app.add(testName, testNumber);
+        app.remove(testName);
+        Assert.assertFalse(app.hasEntry(testName));
+    }
+
+    @Test
+    public void reverseLookupTest() {
+        PhoneBook app = new PhoneBook();
+//        returns a name for the respective input phoneNumber
+        app.add(testName, testNumber);
+        String entry = app.reverseLookup(testNumber);
+        Assert.assertTrue(entry.equals((testName)));
+    }
+
+    @Test
+    public void listNamesAndNumbersTest() {
+        PhoneBook app = new PhoneBook();
+
+//        return a human-readable list of all entries (names and phone numbers) in alphabetical order.
+//        Format should be [name] [phone number]
+
+//        System.out.println()
+    }
+
 }