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BAEL-1049 

* BAEL-1049: Update to latest version, and added tests.

* Update FunctionalJavaUnitTest.java

* Update FunctionalJavaUnitTest.java

* Add blank lines before asserts.
This commit is contained in:
Paul van Gool 2018-12-05 18:11:21 -08:00 committed by Emily Cheyne
parent df7b723cba
commit 8b8fda7d0b
2 changed files with 123 additions and 80 deletions
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2
libraries/pom.xml
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@ -942,7 +942,7 @@
<yarg.version>2.0.4</yarg.version>
<mbassador.version>1.3.1</mbassador.version>
<jdeferred.version>1.2.6</jdeferred.version>
<functionaljava.version>4.7</functionaljava.version>
<functionaljava.version>4.8.1</functionaljava.version>
<jgrapht.version>1.0.1</jgrapht.version>
<docx4j.version>3.3.5</docx4j.version>
<jaxb-api.version>2.1</jaxb-api.version>

55
libraries/src/test/java/com/baeldung/fj/FunctionalJavaUnitTest.java
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@ -5,6 +5,7 @@ import static org.junit.Assert.assertEquals;
import org.junit.Test;
import fj.F;
import fj.Show;
import fj.data.Array;
import fj.data.List;
import fj.data.Option;
@ -15,12 +16,41 @@ public class FunctionalJavaUnitTest {
public static final F<Integer, Boolean> isEven = i -> i % 2 == 0;
public static final Integer timesTwoRegular(Integer i) {
return i * 2;
}
public static final F<Integer, Integer> timesTwo = i -> i * 2;
public static final F<Integer, Integer> plusOne = i -> i + 1;
@Test
public void multiplyNumbers_givenIntList_returnTrue() {
List<Integer> fList = List.list(1, 2, 3, 4);
List<Integer> fList1 = fList.map(timesTwo);
List<Integer> fList2 = fList.map(i -> i * 2);
assertEquals(fList1.equals(fList2), true);
}
@Test
public void applyMultipleFunctions_givenIntList_returnFalse() {
List<Integer> fList = List.list(1, 2, 3, 4);
List<Integer> fList1 = fList.map(timesTwo).map(plusOne);
Show.listShow(Show.intShow).println(fList1);
List<Integer> fList2 = fList.map(plusOne).map(timesTwo);
Show.listShow(Show.intShow).println(fList2);
assertEquals(fList1.equals(fList2), false);
}
@Test
public void calculateEvenNumbers_givenIntList_returnTrue() {
List<Integer> fList = List.list(3, 4, 5, 6);
List<Boolean> evenList = fList.map(isEven);
List<Boolean> evenListTrueResult = List.list(false, true, false, true);
List<Boolean> evenListFalseResult = List.list(true, false, false, true);
assertEquals(evenList.equals(evenListTrueResult), true);
assertEquals(evenList.equals(evenListFalseResult), false);
}
@ -31,6 +61,7 @@ public class FunctionalJavaUnitTest {
fList = fList.map(i -> i + 100);
List<Integer> resultList = List.list(103, 104, 105, 106);
List<Integer> falseResultList = List.list(15, 504, 105, 106);
assertEquals(fList.equals(resultList), true);
assertEquals(fList.equals(falseResultList), false);
}
@ -38,9 +69,10 @@ public class FunctionalJavaUnitTest {
@Test
public void filterList_givenIntList_returnResult() {
Array<Integer> array = Array.array(3, 4, 5, 6);
Array<Integer> filteredArray = array.filter(Integers.even);
Array<Integer> filteredArray = array.filter(isEven);
Array<Integer> result = Array.array(4, 6);
Array<Integer> wrongResult = Array.array(3, 5);
assertEquals(filteredArray.equals(result), true);
assertEquals(filteredArray.equals(wrongResult), false);
}
@ -51,29 +83,40 @@ public class FunctionalJavaUnitTest {
Array<String> array2 = Array.array("Welcome", "To", "Baeldung");
Boolean isExist = array.exists(s -> List.fromString(s).forall(Characters.isLowerCase));
Boolean isExist2 = array2.exists(s -> List.fromString(s).forall(Characters.isLowerCase));
Boolean isAll = array.forall(s -> List.fromString(s).forall(Characters.isLowerCase));
assertEquals(isExist, true);
assertEquals(isExist2, false);
assertEquals(isAll, false);
}
@Test
public void checkOptions_givenOptions_returnResult() {
Option<Integer> n1 = Option.some(1);
Option<Integer> n2 = Option.some(2);
Option<Integer> n3 = Option.none();
F<Integer, Option<Integer>> f1 = i -> i % 2 == 0 ? Option.some(i + 100) : Option.none();
F<Integer, Option<Integer>> function = i -> i % 2 == 0 ? Option.some(i + 100) : Option.none();
Option<Integer> result1 = n1.bind(f1);
Option<Integer> result2 = n2.bind(f1);
Option<Integer> result1 = n1.bind(function);
Option<Integer> result2 = n2.bind(function);
Option<Integer> result3 = n3.bind(function);
assertEquals(result1, Option.none());
assertEquals(result2, Option.some(102));
assertEquals(result3, Option.none());
}
@Test
public void foldLeft_givenArray_returnResult() {
Array<Integer> intArray = Array.array(17, 44, 67, 2, 22, 80, 1, 27);
int sum = intArray.foldLeft(Integers.add, 0);
assertEquals(sum, 260);
int sumAll = intArray.foldLeft(Integers.add, 0);
assertEquals(sumAll, 260);
int sumEven = intArray.filter(isEven).foldLeft(Integers.add, 0);
assertEquals(sumEven, 148);
}
}