*Java*

Please complete the methods: containsKey, containsValue, get, isEmpty, put, remove, size and values.

In a separate test docuemnt the previous methods should all return a green check for the following:

MyHashMap.java:

java.util.ArrayList; java.util.Collection; java.util.Map; java.util.Set;

public class MyHashMap implements Map {

private ArrayList table;

private int maxTableSize = 50; private int tableSize = 0;

public MyHashMap() { table = new ArrayList(); this.clear(); }

public MyHashMap(int maxSize) { table = new ArrayList(); maxTableSize = maxSize; this.clear(); }

public void clear() { table.clear(); tableSize = 0; for (int i = 0; i

}

public boolean containsKey(Object key) { return false; }

public boolean containsValue(Object arg0) { return false; }

public V get(Object key) { return null; }

public boolean isEmpty() { return false; }

public V put(K key, V value) { return null; }

public V remove(Object key) { return null; }

public int size() { return tableSize; }

public Collection values() { return null; }

// Do not implement methods passed this point public Set> entrySet() { return null; }

public Set keySet() { return null; }

public void putAll(Map arg0) {

} }

MyHashMapTest.java:

import static org.junit.Assert.assertEquals; import static org.junit.Assert.assertFalse; import static org.junit.Assert.assertNull; import static org.junit.Assert.assertTrue;

import java.util.List;

import org.junit.jupiter.api.Test;

/** * Test class for MyHashMap * */ class MyHashMapTest {

@Test void get_EmptyHashMap_ShouldReturnNull() { var hm = new MyHashMap(); var res = hm.get("hello"); assertNull(res); }

@Test void get_HashMapHasKey_ShouldReturnPairedValue() { var hm = new MyHashMap(); var key = 1; var value = "JAVA"; hm.put(key, value);

var res = hm.get(key);

assertEquals(value, res); }

@Test void put_NewKey_ShouldContainKeyValue() { var hm = new MyHashMap(); var key = 1; var value = "JAVA"; hm.put(key, value);

var res = hm.get(key);

assertEquals(value, res); }

@Test void put_KeyAlreadyExists_ShouldContainNewValue() { var hm = new MyHashMap(); var key = 1; var value = "JAVA"; var secondValue = "J++"; hm.put(key, value); hm.put(key, secondValue);

var res = hm.get(key);

assertEquals(secondValue, res); }

@Test void clear_HashMapHasSeveralKeys_ShouldRemoveAllItems() { var hm = new MyHashMap(); var key = 1; var key2 = 2; var value = "JAVA"; hm.put(key, value); hm.put(key2, value);

hm.clear();

assertNull(hm.get(key)); assertNull(hm.get(key2)); }

@Test void containsKey_HashMapHasKey_ShouldReturnTrue() { var hm = new MyHashMap(); var key = 1; var value = "JAVA";

hm.put(key, value);

assertTrue(hm.containsKey(key)); }

@Test void containsKey_HashMapDoesNotHaveKey_ShouldReturnTrue() { var hm = new MyHashMap(); var key = 1; var keyNotMapped = 2; var value = "JAVA";

hm.put(key, value);

assertFalse(hm.containsKey(keyNotMapped)); }

@Test void containesValue_HashMapHasValue_ShouldReturnTrue() { var hm = new MyHashMap(); var key = 1; var value = "JAVA";

hm.put(key, value);

assertTrue(hm.containsValue(value)); }

@Test void containesValue_HashMapDoesNotHaveValue_ShouldReturnTrue() { var hm = new MyHashMap(); var key = 1; var value = "JAVA"; var valueNotMapped = "HASKELL";

hm.put(key, value);

assertFalse(hm.containsValue(valueNotMapped)); }

@Test void empty_HashMapIsEmpty_ShouldReturnTrue() { var hm = new MyHashMap();

assertTrue(hm.isEmpty()); }

@Test void empty_HashMapIsNotEmpty_ShouldReturnFalse() { var hm = new MyHashMap(); var key = 1; var value = "JAVA";

hm.put(key, value);

assertFalse(hm.isEmpty()); }

@Test void remove_HashMapContainsKey_ShouldRemoveKey() { var hm = new MyHashMap(); var key = 1; var value = "JAVA";

hm.put(key, value);

var removed = hm.remove(key);

assertEquals(value, removed); assertNull(hm.get(key)); }

@Test void size_HashMapContainsSeveralKeyValue_ShouldReturnExpectedSize() { var hm = new MyHashMap(); var expectedSize = 5;

hm.put(1, "JAVA"); hm.put(2, "JAVA"); hm.put(3, "JAVA"); hm.put(4, "JAVA"); hm.put(5, "JAVA");

assertEquals(expectedSize, hm.size()); }

void values_HashMapContainsSeveralKeyValue_ShouldReturnValues() { var hm = new MyHashMap(); var expectedValues = List.of("JAVA", "C++", "ADA");

for (int i = 0; i

var res = hm.values();

assertEquals(expectedValues, res); }

void values_HashMapIsEmpty_ShouldReturnEmptyCollection() { var hm = new MyHashMap();

var res = hm.values();

assertTrue(res.isEmpty()); } }

MyHashMap Test (Runner: JUnit 5] (0,211 s) empty_HashMapIsNotEmpty_ShouldReturnFalse0 (0,062 s) ** remove_HashMap ContainsKey_ShouldRemoveKey0 (0,005 s) ** contains Key_HashMapDoes Not HaveKey_ShouldReturn Truel ( clear_HashMapHasSeveralKeys_ShouldRemoveAllltems() (0,009 containesValue_HashMapHasValue_ShouldReturn Truel (0,006 s containesValue_HashMapDoes NotHaveValue_ShouldReturn Truel (o i put_KeyAlreadyExists_Should ContainNewValue() (0,007 s) x3 put_NewKey_Should ContainKeyValue() (0,010 s) get_EmptyHashMap_ShouldReturnNullO (0,011 s) 3 size_HashMap ContainsSeveralKeyValue_ShouldReturnExpectedSizel empty_HashMaplsEmpty_ShouldReturn Truel (0,016 s) contains Key_HashMapHasKey_ShouldReturn Truel (0,004 s) get_HashMapHasKey_ShouldReturnPairedValue() (0,005 s)