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Add generic hashmaps (#3195)

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Divya Raichura
2022-07-18 01:30:55 +05:30
committed by GitHub
parent 1a9937c7cb
commit ffd02504d9
4 changed files with 335 additions and 0 deletions
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49
src/test/java/com/thealgorithms/datastructures/hashmap/hashing/GenericHashMapUsingArrayListTest.java Normal file
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package com.thealgorithms.datastructures.hashmap.hashing;
import org.junit.jupiter.api.Test;
import static org.junit.jupiter.api.Assertions.*;
class GenericHashMapUsingArrayListTest {
@Test
void testGenericHashmapWhichUsesArrayAndBothKeyAndValueAreStrings() {
GenericHashMapUsingArrayList<String, String> map = new GenericHashMapUsingArrayList<>();
map.put("USA", "Washington DC");
map.put("Nepal", "Kathmandu");
map.put("India", "New Delhi");
map.put("Australia", "Sydney");
assertNotNull(map);
assertEquals(4, map.size());
assertEquals("Kathmandu", map.get("Nepal"));
assertEquals("Sydney", map.get("Australia"));
}
@Test
void testGenericHashmapWhichUsesArrayAndKeyIsStringValueIsInteger() {
GenericHashMapUsingArrayList<String, Integer> map = new GenericHashMapUsingArrayList<>();
map.put("USA", 87);
map.put("Nepal", 25);
map.put("India", 101);
map.put("Australia", 99);
assertNotNull(map);
assertEquals(4, map.size());
assertEquals(25, map.get("Nepal"));
assertEquals(99, map.get("Australia"));
map.remove("Nepal");
assertFalse(map.containsKey("Nepal"));
}
@Test
void testGenericHashmapWhichUsesArrayAndKeyIsIntegerValueIsString() {
GenericHashMapUsingArrayList<Integer, String> map = new GenericHashMapUsingArrayList<>();
map.put(101, "Washington DC");
map.put(34, "Kathmandu");
map.put(46, "New Delhi");
map.put(89, "Sydney");
assertNotNull(map);
assertEquals(4, map.size());
assertEquals("Sydney", map.get(89));
assertEquals("Washington DC", map.get(101));
assertTrue(map.containsKey(46));
}
}

49
src/test/java/com/thealgorithms/datastructures/hashmap/hashing/GenericHashMapUsingArrayTest.java Normal file
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package com.thealgorithms.datastructures.hashmap.hashing;
import org.junit.jupiter.api.Test;
import static org.junit.jupiter.api.Assertions.*;
class GenericHashMapUsingArrayTest {
@Test
void testGenericHashmapWhichUsesArrayAndBothKeyAndValueAreStrings() {
GenericHashMapUsingArray<String, String> map = new GenericHashMapUsingArray<>();
map.put("USA", "Washington DC");
map.put("Nepal", "Kathmandu");
map.put("India", "New Delhi");
map.put("Australia", "Sydney");
assertNotNull(map);
assertEquals(4, map.size());
assertEquals("Kathmandu", map.get("Nepal"));
assertEquals("Sydney", map.get("Australia"));
}
@Test
void testGenericHashmapWhichUsesArrayAndKeyIsStringValueIsInteger() {
GenericHashMapUsingArray<String, Integer> map = new GenericHashMapUsingArray<>();
map.put("USA", 87);
map.put("Nepal", 25);
map.put("India", 101);
map.put("Australia", 99);
assertNotNull(map);
assertEquals(4, map.size());
assertEquals(25, map.get("Nepal"));
assertEquals(99, map.get("Australia"));
map.remove("Nepal");
assertFalse(map.containsKey("Nepal"));
}
@Test
void testGenericHashmapWhichUsesArrayAndKeyIsIntegerValueIsString() {
GenericHashMapUsingArray<Integer, String> map = new GenericHashMapUsingArray<>();
map.put(101, "Washington DC");
map.put(34, "Kathmandu");
map.put(46, "New Delhi");
map.put(89, "Sydney");
assertNotNull(map);
assertEquals(4, map.size());
assertEquals("Sydney", map.get(89));
assertEquals("Washington DC", map.get(101));
assertTrue(map.containsKey(46));
}
}