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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
public void setUp() {
List<String> xs = LongStream.range(0, 16)
List<String> list = LongStream.range(0, 16)
.boxed()
.map(Long::toHexString)
.collect(toCollection(ArrayList::new));
stringsToSearch = new ArrayList<>(xs);
stringsToSearch.addAll(xs);
stringsToSearch = new ArrayList<>(list);
stringsToSearch.addAll(list);
}
@Test
public void givenNewArrayList_whenCheckCapacity_thenDefaultValue() {
List<String> xs = new ArrayList<>();
assertTrue(xs.isEmpty());
List<String> list = new ArrayList<>();
assertTrue(list.isEmpty());
}
@Test
@ -37,29 +37,29 @@ public class ArrayListTest {
Collection<Integer> numbers =
IntStream.range(0, 10).boxed().collect(toSet());
List<Integer> xs = new ArrayList<>(numbers);
assertEquals(10, xs.size());
assertTrue(numbers.containsAll(xs));
List<Integer> list = new ArrayList<>(numbers);
assertEquals(10, list.size());
assertTrue(numbers.containsAll(list));
}
@Test
public void givenElement_whenAddToArrayList_thenIsAdded() {
List<Long> xs = new ArrayList<>();
List<Long> list = new ArrayList<>();
xs.add(1L);
xs.add(2L);
xs.add(1, 3L);
list.add(1L);
list.add(2L);
list.add(1, 3L);
assertThat(Arrays.asList(1L, 3L, 2L), equalTo(xs));
assertThat(Arrays.asList(1L, 3L, 2L), equalTo(list));
}
@Test
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()
.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
@ -106,27 +106,27 @@ public class ArrayListTest {
@Test
public void givenIndex_whenRemove_thenCorrectElementRemoved() {
List<Integer> xs = IntStream.range(0, 10).boxed().collect(toCollection(ArrayList::new));
Collections.reverse(xs);
List<Integer> list = IntStream.range(0, 10).boxed().collect(toCollection(ArrayList::new));
Collections.reverse(list);
xs.remove(0);
assertThat(xs.get(0), equalTo(8));
list.remove(0);
assertThat(list.get(0), equalTo(8));
xs.remove(Integer.valueOf(0));
assertFalse(xs.contains(0));
list.remove(Integer.valueOf(0));
assertFalse(list.contains(0));
}
@Test
public void givenListIterator_whenReverseTraversal_thenRetrieveElementsInOppositeOrder() {
List<Integer> xs = IntStream.range(0, 10).boxed().collect(toCollection(ArrayList::new));
ListIterator<Integer> it = xs.listIterator(xs.size());
List<Integer> result = new ArrayList<>(xs.size());
List<Integer> list = IntStream.range(0, 10).boxed().collect(toCollection(ArrayList::new));
ListIterator<Integer> it = list.listIterator(list.size());
List<Integer> result = new ArrayList<>(list.size());
while (it.hasPrevious()) {
result.add(it.previous());
}
Collections.reverse(xs);
assertThat(result, equalTo(xs));
Collections.reverse(list);
assertThat(result, equalTo(list));
}
@Test