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Array to List tests (#3960)

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Felipe Santiago Corro 2018-04-11 16:50:08 -03:00 committed by maibin
parent ee036aacca
commit d3c292a093
1 changed files with 116 additions and 0 deletions
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core-java/src/test/java/com/baeldung/array/converter/ArrayConvertToListTest.java Normal file
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package com.baeldung.array.converter;
import org.junit.Test;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
import static org.junit.Assert.*;
public class ArrayConvertToListTest {
@Test
public void givenAnStringArray_whenConvertArrayToList_thenListCreated() {
String[] flowers = { "Ageratum", "Allium", "Poppy", "Catmint" };
List<String> flowerList = Arrays.asList(flowers);
assertNotNull(flowerList);
assertEquals(flowerList.size(), 4);
assertEquals(flowerList.get(0), "Ageratum");
assertEquals(flowerList.get(1), "Allium");
assertEquals(flowerList.get(2), "Poppy");
assertEquals(flowerList.get(3), "Catmint");
}
@Test
public void givenAnIntArray_whenConvertArrayToList_thenListWithOneElementCreated() {
int[] primitives = { 1, 2, 3, 4 };
List numbers = Arrays.asList(primitives);
assertNotNull(numbers);
assertEquals(numbers.size(), 1);
assertEquals(numbers.get(0), primitives);
}
@Test(expected = UnsupportedOperationException.class)
public void givenAnStringArray_whenConvertArrayToListAndAddAnElement_thenThrowUnsupportedOperationException() {
String[] flowers = { "Ageratum", "Allium", "Poppy", "Catmint" };
List<String> flowerList = Arrays.asList(flowers);
assertNotNull(flowerList);
assertEquals(flowerList.size(), 4);
assertEquals(flowerList.get(0), "Ageratum");
assertEquals(flowerList.get(1), "Allium");
assertEquals(flowerList.get(2), "Poppy");
assertEquals(flowerList.get(3), "Catmint");
flowerList.add("Celosia");
}
@Test(expected = UnsupportedOperationException.class)
public void givenAnStringArray_whenConvertArrayToListAndRemoveAnElement_thenThrowUnsupportedOperationException() {
String[] flowers = { "Ageratum", "Allium", "Poppy", "Catmint" };
List<String> flowerList = Arrays.asList(flowers);
assertNotNull(flowerList);
assertEquals(flowerList.size(), 4);
assertEquals(flowerList.get(0), "Ageratum");
assertEquals(flowerList.get(1), "Allium");
assertEquals(flowerList.get(2), "Poppy");
assertEquals(flowerList.get(3), "Catmint");
flowerList.remove("Poppy");
}
@Test
public void givenAnStringArray_whenCreateListFromArrayAndAddAnElement_thenListOk() {
String[] flowers = { "Ageratum", "Allium", "Poppy", "Catmint" };
List<String> flowerList = Arrays.asList(flowers);
assertNotNull(flowerList);
assertEquals(flowerList.size(), 4);
assertEquals(flowerList.get(0), "Ageratum");
assertEquals(flowerList.get(1), "Allium");
assertEquals(flowerList.get(2), "Poppy");
assertEquals(flowerList.get(3), "Catmint");
List<String> newflowerList = new ArrayList<>(flowerList);
assertNotNull(newflowerList);
assertEquals(newflowerList.size(), 4);
assertEquals(newflowerList.get(0), "Ageratum");
assertEquals(newflowerList.get(1), "Allium");
assertEquals(newflowerList.get(2), "Poppy");
assertEquals(newflowerList.get(3), "Catmint");
newflowerList.add("Celosia");
assertEquals(newflowerList.size(), 5);
assertEquals(newflowerList.get(4), "Celosia");
}
@Test
public void givenAnStringArray_whenIterateArrayAndAddTheElementsToNewListAndAddAnElement_thenListOk() {
String[] flowers = { "Ageratum", "Allium", "Poppy", "Catmint" };
List<String> flowerList = new ArrayList<>();
for(String flower: flowers) {
flowerList.add(flower);
}
assertNotNull(flowerList);
assertEquals(flowerList.size(), 4);
assertEquals(flowerList.get(0), "Ageratum");
assertEquals(flowerList.get(1), "Allium");
assertEquals(flowerList.get(2), "Poppy");
assertEquals(flowerList.get(3), "Catmint");
flowerList.add("Celosia");
assertEquals(flowerList.size(), 5);
assertEquals(flowerList.get(4), "Celosia");
}
}