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Integrate forEach and stream changes to test, removing non-test class. (#1529) 

* article Bael-667 initial commit.

* Switch to use logging framework for output.
This commit is contained in:
gitterjim-I 2017-03-29 22:18:20 +01:00 committed by Zeger Hendrikse
parent b63ef448db
commit ea345fa246
2 changed files with 48 additions and 34 deletions
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core-java/0.8260098203820962 Normal file
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82
core-java/src/test/java/com/baeldung/list/flattennestedlist/FlattenNestedListTest.java
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@ -1,6 +1,8 @@
package com.baeldung.list.flattennestedlist;
import org.junit.Test;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertNotNull;
import static org.junit.Assert.assertTrue;
import java.util.ArrayList;
import java.util.Arrays;
@ -8,45 +10,60 @@ import java.util.Collection;
import java.util.List;
import java.util.stream.Collectors;
import static org.junit.Assert.assertNotNull;
import static org.junit.Assert.assertTrue;
import org.junit.After;
import org.junit.Before;
import org.junit.Test;
public class FlattenNestedListTest {
private List<List<String>> lol = new ArrayList<>();
List<String> ls1 = Arrays.asList("one:one", "one:two", "one:three");
List<String> ls2 = Arrays.asList("two:one", "two:two", "two:three");
List<String> ls3 = Arrays.asList("three:one", "three:two", "three:three");
@Test
public void givenListOfListOfString_flattenNestedList1() {
// given
List<String> ls1 = Arrays.asList("one:one", "one:two", "one:three");
List<String> ls2 = Arrays.asList("two:one", "two:two", "two:three");
List<String> ls3 = Arrays.asList("three:one", "three:two", "three:three");
@Before
public void setup() {
lol.addAll(Arrays.asList(ls1, ls2, ls3));
}
List<List<String>> list = Arrays.asList(ls1, ls2, ls3);
// when
List<String> ls = flattenListOfListsImperatively(list);
// then
assertNotNull(ls);
assertTrue(ls.size() == 9);
//TODO content assertion
@After
public void tearDown() {
lol = null;
}
@Test
public void givenListOfListOfString_flattenNestedList2() {
// given
List<String> ls1 = Arrays.asList("one:one", "one:two", "one:three");
List<String> ls2 = Arrays.asList("two:one", "two:two", "two:three");
List<String> ls3 = Arrays.asList("three:one", "three:two", "three:three");
public void givenString_flattenNestedList1() {
List<String> ls = flattenListOfListsImperatively(lol);
List<List<String>> list = Arrays.asList(ls1, ls2, ls3);
// when
List<String> ls = flattenListOfListsStream(list);
// then
assertNotNull(ls);
assertTrue(ls.size() == 9);
//TODO content assertion
// assert content
assertEquals(ls.get(0), "one:one");
assertEquals(ls.get(1), "one:two");
assertEquals(ls.get(2), "one:three");
assertEquals(ls.get(3), "two:one");
assertEquals(ls.get(4), "two:two");
assertEquals(ls.get(5), "two:three");
assertEquals(ls.get(6), "three:one");
assertEquals(ls.get(7), "three:two");
assertEquals(ls.get(8), "three:three");
}
@Test
public void givenString_flattenNestedList2() {
List<String> ls = flattenListOfListsStream(lol);
assertNotNull(ls);
assertTrue(ls.size() == 9);
// assert content
assertEquals(ls.get(0), "one:one");
assertEquals(ls.get(1), "one:two");
assertEquals(ls.get(2), "one:three");
assertEquals(ls.get(3), "two:one");
assertEquals(ls.get(4), "two:two");
assertEquals(ls.get(5), "two:three");
assertEquals(ls.get(6), "three:one");
assertEquals(ls.get(7), "three:two");
assertEquals(ls.get(8), "three:three");
}
public <T> List<T> flattenListOfListsImperatively(List<List<T>> list) {
@ -56,9 +73,6 @@ public class FlattenNestedListTest {
}
public <T> List<T> flattenListOfListsStream(List<List<T>> list) {
return list.stream()
.flatMap(Collection::stream)
.collect(Collectors.toList());
return list.stream().flatMap(Collection::stream).collect(Collectors.toList());
}
}