97 lines
2.9 KiB
Java
97 lines
2.9 KiB
Java
package com.baeldung.pcollections;
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import org.junit.Test;
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import org.pcollections.HashPMap;
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import org.pcollections.HashTreePMap;
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import org.pcollections.HashTreePSet;
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import org.pcollections.MapPSet;
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import org.pcollections.PVector;
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import org.pcollections.TreePVector;
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import java.util.Arrays;
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import java.util.HashMap;
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import java.util.Map;
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import static org.junit.Assert.assertEquals;
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import static org.junit.Assert.assertFalse;
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import static org.junit.Assert.assertTrue;
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public class PCollectionsUnitTest {
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@Test
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public void whenEmpty_thenCreateEmptyHashPMap() {
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HashPMap<String, String> pmap = HashTreePMap.empty();
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assertEquals(pmap.size(), 0);
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}
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@Test
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public void givenKeyValue_whenSingleton_thenCreateNonEmptyHashPMap() {
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HashPMap<String, String> pmap1 = HashTreePMap.singleton("key1", "value1");
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assertEquals(pmap1.size(), 1);
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}
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@Test
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public void givenExistingHashMap_whenFrom_thenCreateHashPMap() {
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Map<String, String> map = new HashMap<>();
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map.put("mkey1", "mval1");
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map.put("mkey2", "mval2");
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HashPMap<String, String> pmap2 = HashTreePMap.from(map);
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assertEquals(pmap2.size(), 2);
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}
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@Test
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public void whenHashPMapMethods_thenPerformOperations() {
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HashPMap<String, String> pmap = HashTreePMap.empty();
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HashPMap<String, String> pmap0 = pmap.plus("key1", "value1");
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Map<String, String> map = new HashMap<>();
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map.put("key2", "val2");
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map.put("key3", "val3");
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HashPMap<String, String> pmap1 = pmap0.plusAll(map);
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HashPMap<String, String> pmap2 = pmap1.minus("key1");
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HashPMap<String, String> pmap3 = pmap2.minusAll(map.keySet());
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assertEquals(pmap0.size(), 1);
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assertEquals(pmap1.size(), 3);
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assertFalse(pmap2.containsKey("key1"));
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assertEquals(pmap3.size(), 0);
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}
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@Test
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public void whenTreePVectorMethods_thenPerformOperations() {
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TreePVector<String> pVector = TreePVector.empty();
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TreePVector<String> pV1 = pVector.plus("e1");
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TreePVector<String> pV2 = pV1.plusAll(Arrays.asList("e2", "e3", "e4"));
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assertEquals(1, pV1.size());
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assertEquals(4, pV2.size());
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TreePVector<String> pV3 = pV2.minus("e1");
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TreePVector<String> pV4 = pV3.minusAll(Arrays.asList("e2", "e3", "e4"));
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assertEquals(pV3.size(), 3);
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assertEquals(pV4.size(), 0);
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TreePVector<String> pSub = pV2.subList(0, 2);
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assertTrue(pSub.contains("e1") && pSub.contains("e2"));
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PVector<String> pVW = pV2.with(0, "e10");
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assertEquals(pVW.get(0), "e10");
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}
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@Test
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public void whenMapPSetMethods_thenPerformOperations() {
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MapPSet pSet = HashTreePSet.empty().plusAll(Arrays.asList("e1", "e2", "e3", "e4"));
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assertEquals(pSet.size(), 4);
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MapPSet pSet1 = pSet.minus("e4");
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assertFalse(pSet1.contains("e4"));
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}
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}
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