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Change the names of test methods

This commit is contained in:
Nam Thai Nguyen 2018-02-17 11:45:03 +07:00
parent a67d99a09a
commit 08d53a2cbb
2 changed files with 145 additions and 150 deletions
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49
core-java/src/main/java/com/baeldung/java/list/CustomList.java
View File

@ -9,26 +9,6 @@ import java.util.ListIterator;
public class CustomList<E> implements List<E> { public class CustomList<E> implements List<E> {
private Object[] internal = {}; private Object[] internal = {};
@Override
public boolean add(E element) {
// the first cycle
// internal = new Object[1];
// internal[0] = element;
// return true;
Object[] temp = new Object[internal.length + 1];
System.arraycopy(internal, 0, temp, 0, internal.length);
temp[internal.length] = element;
internal = temp;
return true;
}
@SuppressWarnings("unchecked")
@Override
public E get(int index) {
return (E) internal[index];
}
@Override @Override
public void add(int index, E element) { public void add(int index, E element) {
throw new UnsupportedOperationException(); throw new UnsupportedOperationException();
@ -75,11 +55,28 @@ public class CustomList<E> implements List<E> {
} }
@Override @Override
public boolean contains(Object object) { public boolean add(E element) {
// the first cycle // the first cycle
// if (object.equals(internal[0])) { // internal = new Object[1];
// internal[0] = element;
// return true; // return true;
// }
Object[] temp = new Object[internal.length + 1];
System.arraycopy(internal, 0, temp, 0, internal.length);
temp[internal.length] = element;
internal = temp;
return true;
}
@SuppressWarnings("unchecked")
@Override
public E get(int index) {
return (E) internal[index];
}
@Override
public boolean contains(Object object) {
// return false
for (Object element : internal) { for (Object element : internal) {
if (object.equals(element)) { if (object.equals(element)) {
@ -171,9 +168,7 @@ public class CustomList<E> implements List<E> {
@Override @Override
public <T> T[] toArray(T[] array) { public <T> T[] toArray(T[] array) {
// the first cycle // the first cycle
// for (int i = 0; i < array.length; i++) { // array[0] = (T) internal[0];
// array[i] = (T) internal[i];
// }
// return array; // return array;
// the second cycle // the second cycle
@ -185,6 +180,7 @@ public class CustomList<E> implements List<E> {
if (array.length < internal.length) { if (array.length < internal.length) {
return (T[]) Arrays.copyOf(internal, internal.length, array.getClass()); return (T[]) Arrays.copyOf(internal, internal.length, array.getClass());
} }
System.arraycopy(internal, 0, array, 0, internal.length); System.arraycopy(internal, 0, array, 0, internal.length);
if (array.length > internal.length) { if (array.length > internal.length) {
array[internal.length] = null; array[internal.length] = null;
@ -204,6 +200,7 @@ public class CustomList<E> implements List<E> {
@Override @Override
public ListIterator<E> listIterator(int index) { public ListIterator<E> listIterator(int index) {
// ignored for brevity
return null; return null;
} }

244
core-java/src/test/java/com/baeldung/java/list/CustomListUnitTest.java
View File

@ -14,51 +14,41 @@ import java.util.List;
import org.junit.Test; import org.junit.Test;
public class CustomListUnitTest { public class CustomListUnitTest {
@Test
public void givenAddToTheEndAndGetImpl_whenCycle1_thenPasses() {
List<Object> list = new CustomList<>();
boolean succeeded = list.add("baeldung");
Object element = list.get(0);
assertTrue(succeeded);
assertEquals("baeldung", element);
}
@Test(expected = UnsupportedOperationException.class) @Test(expected = UnsupportedOperationException.class)
public void givenAddToSpecifiedIndexImpl_whenCycle1_thenPasses() { public void whenAddToSpecifiedIndex_thenExceptionIsThrown() {
new CustomList<>().add(0, null); new CustomList<>().add(0, null);
} }
@Test(expected = UnsupportedOperationException.class) @Test(expected = UnsupportedOperationException.class)
public void givenAddAllToTheEndImpl_whenCycle1_thenPasses() { public void whenAddAllToTheEnd_thenExceptionIsThrown() {
Collection<Object> collection = new ArrayList<>(); Collection<Object> collection = new ArrayList<>();
List<Object> list = new CustomList<>(); List<Object> list = new CustomList<>();
list.addAll(collection); list.addAll(collection);
} }
@Test(expected = UnsupportedOperationException.class) @Test(expected = UnsupportedOperationException.class)
public void givenAddAllToSpecifiedIndexImpl_whenCycle1_thenPasses() { public void whenAddAllToSpecifiedIndex_thenExceptionIsThrown() {
Collection<Object> collection = new ArrayList<>(); Collection<Object> collection = new ArrayList<>();
List<Object> list = new CustomList<>(); List<Object> list = new CustomList<>();
list.addAll(0, collection); list.addAll(0, collection);
} }
@Test(expected = UnsupportedOperationException.class) @Test(expected = UnsupportedOperationException.class)
public void givenRemoveAtSpecifiedIndexImpl_whenCycle1_thenPasses() { public void whenRemoveAtSpecifiedIndex_thenExceptionIsThrown() {
List<Object> list = new CustomList<>(); List<Object> list = new CustomList<>();
list.add("baeldung"); list.add("baeldung");
list.remove(0); list.remove(0);
} }
@Test(expected = UnsupportedOperationException.class) @Test(expected = UnsupportedOperationException.class)
public void givenRemoveSpecifiedElementImpl_whenCycle1_thenPasses() { public void whenRemoveSpecifiedElement_thenExceptionIsThrown() {
List<Object> list = new CustomList<>(); List<Object> list = new CustomList<>();
list.add("baeldung"); list.add("baeldung");
list.remove("baeldung"); list.remove("baeldung");
} }
@Test(expected = UnsupportedOperationException.class) @Test(expected = UnsupportedOperationException.class)
public void givenRemoveAllImpl_whenCycle1_thenPasses() { public void whenRemoveAll_thenExceptionIsThrown() {
Collection<Object> collection = new ArrayList<>(); Collection<Object> collection = new ArrayList<>();
collection.add("baeldung"); collection.add("baeldung");
List<Object> list = new CustomList<>(); List<Object> list = new CustomList<>();
@ -66,7 +56,7 @@ public class CustomListUnitTest {
} }
@Test(expected = UnsupportedOperationException.class) @Test(expected = UnsupportedOperationException.class)
public void givenRetainAllImpl_whenCycle1_thenPasses() { public void whenRetainAll_thenExceptionIsThrown() {
Collection<Object> collection = new ArrayList<>(); Collection<Object> collection = new ArrayList<>();
collection.add("baeldung"); collection.add("baeldung");
List<Object> list = new CustomList<>(); List<Object> list = new CustomList<>();
@ -75,112 +65,31 @@ public class CustomListUnitTest {
} }
@Test @Test
public void givenSizeImpl_whenCycle1_thenPasses() { public void whenSize_thenNumberOfElementsIsReturned() {
List<Object> list = new CustomList<>(); List<Object> list = new CustomList<>();
assertEquals(0, list.size()); assertEquals(0, list.size());
} }
@Test @Test
public void givenIsEmptyImpl_whenCycle1_thenPasses() { public void whenIsEmpty_thenWhetherListIsEmptyIsReturned() {
List<Object> list = new CustomList<>(); List<Object> list = new CustomList<>();
assertTrue(list.isEmpty()); assertTrue(list.isEmpty());
} }
@Test @Test
public void givenContainsImpl_whenCycle1_thenPasses() { public void whenAddToTheEndAndGet_thenAddedElementIsReturned() {
List<Object> list = new CustomList<>(); List<Object> list = new CustomList<>();
list.add("baeldung"); boolean succeeded = list.add("baeldung");
Object element = list.get(0);
assertTrue(list.contains("baeldung"));
}
@Test
public void givenContainsAllImpl_whenCycle1_thenPasses() {
Collection<Object> collection = new ArrayList<>();
collection.add("baeldung");
List<Object> list = new CustomList<>();
list.add("baeldung");
assertTrue(list.containsAll(collection));
}
@Test
public void givenSetImpl_whenCycle1_thenPasses() {
List<Object> list = new CustomList<>();
list.add("baeldung");
Object element = list.set(0, null);
assertTrue(succeeded);
assertEquals("baeldung", element); assertEquals("baeldung", element);
assertNull(list.get(0));
} }
@Test @Test
public void givenClearImpl_whenCycle1_thenPasses() { public void whenAddToTheEndAndGet_thenAddedElemenetsAreReturned() {
List<Object> list = new CustomList<>();
list.add("baeldung");
list.clear();
assertTrue(list.isEmpty());
}
@Test
public void givenIndexOfImpl_whenCycle1_thenPasses() {
List<Object> list = new CustomList<>();
list.add("baeldung");
assertEquals(0, list.indexOf("baeldung"));
}
@Test
public void givenLastIndexOfImpl_whenCycle1_thenPasses() {
List<Object> list = new CustomList<>();
list.add("baeldung");
assertEquals(0, list.lastIndexOf("baeldung"));
}
@Test
public void givenSubListImpl_whenCycle1_thenPasses() {
List<Object> list = new CustomList<>();
list.add("baeldung");
List<Object> subList = list.subList(0, 1);
assertEquals("baeldung", subList.get(0));
}
@Test
public void givenToNewArrayImpl_whenCycle1_thenPasses() {
List<Object> list = new CustomList<>();
list.add("baeldung");
Object[] array = list.toArray();
assertEquals("baeldung", array[0]);
}
@Test
public void givenToExistingArrayImpl_whenCycle1_thenPasses() {
List<Object> list = new CustomList<>();
list.add("baeldung");
String[] input = new String[1];
String[] output = list.toArray(input);
assertEquals("baeldung", output[0]);
}
@Test
public void givenIteratorImpl_whenCycle1_thenPasses() {
List<Object> list = new CustomList<>();
list.add("baeldung");
Iterator<Object> iterator = list.iterator();
assertTrue(iterator.hasNext());
assertEquals("baeldung", iterator.next());
}
@Test
public void givenAddToTheEndAndGetImpl_whenCycle2_thenPasses() {
List<Object> list = new CustomList<>(); List<Object> list = new CustomList<>();
boolean succeeded1 = list.add("baeldung"); boolean succeeded1 = list.add("baeldung");
boolean succeeded2 = list.add(".com"); boolean succeeded2 = list.add(".com");
@ -194,16 +103,32 @@ public class CustomListUnitTest {
} }
@Test @Test
public void givenContainsImpl_whenCycle2_thenPasses() { public void whenContains_thenFalseIsReturned() {
List<Object> list = new CustomList<>(); List<Object> list = new CustomList<>();
assertFalse(list.contains("baeldung"));
assertFalse(list.contains("baeldung"));
}
@Test
public void whenContains_thenTrueIsReturned() {
List<Object> list = new CustomList<>();
list.add("baeldung"); list.add("baeldung");
assertTrue(list.contains("baeldung")); assertTrue(list.contains("baeldung"));
} }
@Test @Test
public void givenContainsAllImpl_whenCycle2_thenPasses() { public void whenContainsAll_thenTrueIsReturned() {
Collection<Object> collection = new ArrayList<>();
collection.add("baeldung");
List<Object> list = new CustomList<>();
list.add("baeldung");
assertTrue(list.containsAll(collection));
}
@Test
public void whenContainsAll_thenEitherTrueOfFalseIsReturned() {
Collection<Object> collection1 = new ArrayList<>(); Collection<Object> collection1 = new ArrayList<>();
collection1.add("baeldung"); collection1.add("baeldung");
collection1.add(".com"); collection1.add(".com");
@ -218,7 +143,34 @@ public class CustomListUnitTest {
} }
@Test @Test
public void givenIndexOfImpl_whenCycle2_thenPasses() { public void whenSet_thenOldElementIsReturned() {
List<Object> list = new CustomList<>();
list.add("baeldung");
Object element = list.set(0, null);
assertEquals("baeldung", element);
assertNull(list.get(0));
}
@Test
public void whenClear_thenAllElementsAreRemoved() {
List<Object> list = new CustomList<>();
list.add("baeldung");
list.clear();
assertTrue(list.isEmpty());
}
@Test
public void whenIndexOf_thenIndexZeroIsReturned() {
List<Object> list = new CustomList<>();
list.add("baeldung");
assertEquals(0, list.indexOf("baeldung"));
}
@Test
public void whenIndexOf_thenPositiveOrNegativeIndexIsReturned() {
List<Object> list = new CustomList<>(); List<Object> list = new CustomList<>();
list.add("baeldung"); list.add("baeldung");
list.add(".com"); list.add(".com");
@ -229,7 +181,15 @@ public class CustomListUnitTest {
} }
@Test @Test
public void givenLastIndexOfImpl_whenCycle2_thenPasses() { public void whenLastIndexOf_thenIndexZeroIsReturned() {
List<Object> list = new CustomList<>();
list.add("baeldung");
assertEquals(0, list.lastIndexOf("baeldung"));
}
@Test
public void whenLastIndexOf_thenPositiveOrNegativeIndexIsReturned() {
List<Object> list = new CustomList<>(); List<Object> list = new CustomList<>();
list.add("baeldung"); list.add("baeldung");
list.add("baeldung"); list.add("baeldung");
@ -240,7 +200,16 @@ public class CustomListUnitTest {
} }
@Test @Test
public void givenSubListImpl_whenCycle2_thenPasses() { public void whenSubList_thenListContainingFirstElementIsReturned() {
List<Object> list = new CustomList<>();
list.add("baeldung");
List<Object> subList = list.subList(0, 1);
assertEquals("baeldung", subList.get(0));
}
@Test
public void whenSubList_thenListContainingSecondElementIsReturned() {
List<Object> list = new CustomList<>(); List<Object> list = new CustomList<>();
list.add("baeldung"); list.add("baeldung");
list.add("."); list.add(".");
@ -252,7 +221,26 @@ public class CustomListUnitTest {
} }
@Test @Test
public void givenToExistingArrayImpl_whenCycle2_thenPasses() { public void whenToNewArray_thenArrayIsReturned() {
List<Object> list = new CustomList<>();
list.add("baeldung");
Object[] array = list.toArray();
assertEquals("baeldung", array[0]);
}
@Test
public void whenToArray_thenOldArrayIsReturned() {
List<Object> list = new CustomList<>();
list.add("baeldung");
String[] input = new String[1];
String[] output = list.toArray(input);
assertArrayEquals(new String[] { "baeldung" }, input);
}
@Test
public void whenToArray_thenNewArrayIsReturned() {
List<Object> list = new CustomList<>(); List<Object> list = new CustomList<>();
list.add("baeldung"); list.add("baeldung");
String[] input = {}; String[] input = {};
@ -262,7 +250,27 @@ public class CustomListUnitTest {
} }
@Test @Test
public void givenIteratorImpl_whenCycle2_thenPasses() { public void whenToArray_thenNewArrayWithTrailingNullIsReturned() {
List<Object> list = new CustomList<>();
list.add("baeldung");
String[] input = new String[2];
String[] output = list.toArray(input);
assertArrayEquals(new String[] { "baeldung", null }, output);
}
@Test
public void whenIterator_thenOneCheckIsCorrect() {
List<Object> list = new CustomList<>();
list.add("baeldung");
Iterator<Object> iterator = list.iterator();
assertTrue(iterator.hasNext());
assertEquals("baeldung", iterator.next());
}
@Test
public void whenIterator_thenTwoChecksAreCorrect() {
List<Object> list = new CustomList<>(); List<Object> list = new CustomList<>();
list.add("baeldung"); list.add("baeldung");
Iterator<Object> iterator = list.iterator(); Iterator<Object> iterator = list.iterator();
@ -271,14 +279,4 @@ public class CustomListUnitTest {
assertEquals("baeldung", iterator.next()); assertEquals("baeldung", iterator.next());
assertFalse(iterator.hasNext()); assertFalse(iterator.hasNext());
} }
@Test
public void givenToExistingArrayImpl_whenCycle3_thenPasses() {
List<Object> list = new CustomList<>();
list.add("baeldung");
String[] input = new String[2];
String[] output = list.toArray(input);
assertArrayEquals(new String[] { "baeldung", null }, output);
}
} }