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