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Refactor ArrayListTest

This commit is contained in:
Grzegorz Piwowarek 2016-09-22 18:16:22 +02:00
parent bc8fd9a260
commit 19798c4bd6
1 changed files with 27 additions and 27 deletions
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54
core-java/src/test/java/org/baeldung/java/collections/ArrayListTest.java
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@ -18,18 +18,18 @@ public class ArrayListTest {
@Before @Before
public void setUp() { public void setUp() {
List<String> xs = LongStream.range(0, 16) List<String> list = LongStream.range(0, 16)
.boxed() .boxed()
.map(Long::toHexString) .map(Long::toHexString)
.collect(toCollection(ArrayList::new)); .collect(toCollection(ArrayList::new));
stringsToSearch = new ArrayList<>(xs); stringsToSearch = new ArrayList<>(list);
stringsToSearch.addAll(xs); stringsToSearch.addAll(list);
} }
@Test @Test
public void givenNewArrayList_whenCheckCapacity_thenDefaultValue() { public void givenNewArrayList_whenCheckCapacity_thenDefaultValue() {
List<String> xs = new ArrayList<>(); List<String> list = new ArrayList<>();
assertTrue(xs.isEmpty()); assertTrue(list.isEmpty());
} }
@Test @Test
@ -37,29 +37,29 @@ public class ArrayListTest {
Collection<Integer> numbers = Collection<Integer> numbers =
IntStream.range(0, 10).boxed().collect(toSet()); IntStream.range(0, 10).boxed().collect(toSet());
List<Integer> xs = new ArrayList<>(numbers); List<Integer> list = new ArrayList<>(numbers);
assertEquals(10, xs.size()); assertEquals(10, list.size());
assertTrue(numbers.containsAll(xs)); assertTrue(numbers.containsAll(list));
} }
@Test @Test
public void givenElement_whenAddToArrayList_thenIsAdded() { public void givenElement_whenAddToArrayList_thenIsAdded() {
List<Long> xs = new ArrayList<>(); List<Long> list = new ArrayList<>();
xs.add(1L); list.add(1L);
xs.add(2L); list.add(2L);
xs.add(1, 3L); list.add(1, 3L);
assertThat(Arrays.asList(1L, 3L, 2L), equalTo(xs)); assertThat(Arrays.asList(1L, 3L, 2L), equalTo(list));
} }
@Test @Test
public void givenCollection_whenAddToArrayList_thenIsAdded() { public void givenCollection_whenAddToArrayList_thenIsAdded() {
List<Long> xs = new ArrayList<>(Arrays.asList(1L, 2L, 3L)); List<Long> list = new ArrayList<>(Arrays.asList(1L, 2L, 3L));
LongStream.range(4, 10).boxed() LongStream.range(4, 10).boxed()
.collect(collectingAndThen(toCollection(ArrayList::new), ys -> xs.addAll(0, ys))); .collect(collectingAndThen(toCollection(ArrayList::new), ys -> list.addAll(0, ys)));
assertThat(Arrays.asList(4L, 5L, 6L, 7L, 8L, 9L, 1L, 2L, 3L), equalTo(xs)); assertThat(Arrays.asList(4L, 5L, 6L, 7L, 8L, 9L, 1L, 2L, 3L), equalTo(list));
} }
@Test @Test
@ -106,27 +106,27 @@ public class ArrayListTest {
@Test @Test
public void givenIndex_whenRemove_thenCorrectElementRemoved() { public void givenIndex_whenRemove_thenCorrectElementRemoved() {
List<Integer> xs = IntStream.range(0, 10).boxed().collect(toCollection(ArrayList::new)); List<Integer> list = IntStream.range(0, 10).boxed().collect(toCollection(ArrayList::new));
Collections.reverse(xs); Collections.reverse(list);
xs.remove(0); list.remove(0);
assertThat(xs.get(0), equalTo(8)); assertThat(list.get(0), equalTo(8));
xs.remove(Integer.valueOf(0)); list.remove(Integer.valueOf(0));
assertFalse(xs.contains(0)); assertFalse(list.contains(0));
} }
@Test @Test
public void givenListIterator_whenReverseTraversal_thenRetrieveElementsInOppositeOrder() { public void givenListIterator_whenReverseTraversal_thenRetrieveElementsInOppositeOrder() {
List<Integer> xs = IntStream.range(0, 10).boxed().collect(toCollection(ArrayList::new)); List<Integer> list = IntStream.range(0, 10).boxed().collect(toCollection(ArrayList::new));
ListIterator<Integer> it = xs.listIterator(xs.size()); ListIterator<Integer> it = list.listIterator(list.size());
List<Integer> result = new ArrayList<>(xs.size()); List<Integer> result = new ArrayList<>(list.size());
while (it.hasPrevious()) { while (it.hasPrevious()) {
result.add(it.previous()); result.add(it.previous());
} }
Collections.reverse(xs); Collections.reverse(list);
assertThat(result, equalTo(xs)); assertThat(result, equalTo(list));
} }
@Test @Test