52 lines
1.6 KiB
Java
52 lines
1.6 KiB
Java
|
package com.baeldung.toarraymethod;
|
||
|
|
|
||
|
|
import org.junit.Test;
|
||
|
|
|
||
|
|
import java.util.HashSet;
|
||
|
|
|
||
|
|
import static org.junit.Assert.assertEquals;
|
||
|
|
import static org.junit.Assert.assertTrue;
|
||
|
|
|
||
|
|
public class ConvertingHashSetToArrayUnitTest {
|
||
|
|
|
||
|
|
@Test
|
||
|
|
public void givenStringHashSet_whenConvertedToArray_thenArrayContainsStringElements() {
|
||
|
|
HashSet<String> stringSet = new HashSet<>();
|
||
|
|
stringSet.add("Apple");
|
||
|
|
stringSet.add("Banana");
|
||
|
|
stringSet.add("Cherry");
|
||
|
|
|
||
|
|
// Convert the HashSet of Strings to an array of Strings
|
||
|
|
String[] stringArray = stringSet.toArray(new String[0]);
|
||
|
|
|
||
|
|
// Test that the array is of the correct length
|
||
|
|
assertEquals(3, stringArray.length);
|
||
|
|
|
||
|
|
for (String str : stringArray) {
|
||
|
|
assertTrue(stringSet.contains(str));
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
@Test
|
||
|
|
public void givenIntegerHashSet_whenConvertedToArray_thenArrayContainsIntegerElements() {
|
||
|
|
HashSet<Integer> integerSet = new HashSet<>();
|
||
|
|
integerSet.add(5);
|
||
|
|
integerSet.add(10);
|
||
|
|
integerSet.add(15);
|
||
|
|
|
||
|
|
// Convert the HashSet of Integers to an array of Integers
|
||
|
|
Integer[] integerArray = integerSet.toArray(new Integer[0]);
|
||
|
|
|
||
|
|
// Test that the array is of the correct length
|
||
|
|
assertEquals(3, integerArray.length);
|
||
|
|
|
||
|
|
for (Integer num : integerArray) {
|
||
|
|
assertTrue(integerSet.contains(num));
|
||
|
|
}
|
||
|
|
|
||
|
|
assertTrue(integerSet.contains(5));
|
||
|
|
assertTrue(integerSet.contains(10));
|
||
|
|
assertTrue(integerSet.contains(15));
|
||
|
|
}
|
||
|
|
}
|