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Refactor JoinSplitCollectionsUnitTest

This commit is contained in:
pivovarit 2016-12-03 17:09:34 +01:00
parent 34e5a6475f
commit a6bdad2cb9
1 changed files with 47 additions and 54 deletions
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29
core-java/src/test/java/org/baeldung/java/collections/JoinSplitCollectionsUnitTest.java
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@ -1,31 +1,24 @@
package org.baeldung.java.collections;
import static org.junit.Assert.assertArrayEquals;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertTrue;
import org.junit.Test;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collection;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.*;
import java.util.concurrent.atomic.AtomicInteger;
import java.util.stream.Collectors;
import java.util.stream.Stream;
import org.junit.Test;
import static org.junit.Assert.*;
public class JoinSplitCollectionsUnitTest {
@Test
public void whenJoiningTwoArrays_thenJoined() {
String[] animals1 = new String[] { "Dog", "Cat" };
String[] animals2 = new String[] { "Bird", "Cow" };
String[] animals1 = new String[]{"Dog", "Cat"};
String[] animals2 = new String[]{"Bird", "Cow"};
String[] result = Stream.concat(Arrays.stream(animals1), Arrays.stream(animals2))
.toArray(String[]::new);
assertArrayEquals(result, new String[] { "Dog", "Cat", "Bird", "Cow" });
assertArrayEquals(result, new String[]{"Dog", "Cat", "Bird", "Cow"});
}
@Test
@ -51,7 +44,7 @@ public class JoinSplitCollectionsUnitTest {
@Test
public void whenConvertArrayToString_thenConverted() {
String[] colors = new String[] { "Red", "Blue", "Green", "Yellow" };
String[] colors = new String[]{"Red", "Blue", "Green", "Yellow"};
String result = Arrays.stream(colors)
.collect(Collectors.joining(", "));
@ -99,7 +92,7 @@ public class JoinSplitCollectionsUnitTest {
public void whenConvertCollectionToStringAndSkipNull_thenConverted() {
Collection<String> fruits = Arrays.asList("Apple", "Orange", null, "Grape");
String result = fruits.stream()
.filter(next -> next != null)
.filter(Objects::nonNull)
.collect(Collectors.joining(", "));
assertEquals(result, "Apple, Orange, Grape");
@ -128,9 +121,9 @@ public class JoinSplitCollectionsUnitTest {
@Test
public void whenSplitArrayByWordLength_thenConverted() {
String[] words = new String[] { "bye", "cold", "it", "and", "my", "word" };
String[] words = new String[]{"bye", "cold", "it", "and", "my", "word"};
Map<Integer, List<String>> result = Arrays.stream(words)
.collect(Collectors.groupingBy(word -> word.length()));
.collect(Collectors.groupingBy(String::length));
assertTrue(result.get(2).equals(Arrays.asList("it", "my")));
assertTrue(result.get(3).equals(Arrays.asList("bye", "and")));
@ -142,7 +135,7 @@ public class JoinSplitCollectionsUnitTest {
String colors = "Red, Blue, Green, Yellow";
String[] result = colors.split(", ");
assertArrayEquals(result, new String[] { "Red", "Blue", "Green", "Yellow" });
assertArrayEquals(result, new String[]{"Red", "Blue", "Green", "Yellow"});
}
@Test