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Functional Java PR (#2599)

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* Update pom.xml with functionalJava dependencies

* Add functionalJava classes

* update README.md

* remove unnecessary functionalJava dependencies

* add FunctionalJava Tests

* Delete FunctionalJavaMain.java

* Fix Package Name
This commit is contained in:
nabyla 2017-09-10 15:53:27 +01:00 committed by maibin
parent f6ced9a7ac
commit 07d7ec51e8
2 changed files with 79 additions and 15 deletions
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15
libraries/pom.xml
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@ -564,21 +564,6 @@
<artifactId>functionaljava</artifactId>
<version>4.7</version>
</dependency>
<dependency>
<groupId>org.functionaljava</groupId>
<artifactId>functionaljava-java8</artifactId>
<version>4.7</version>
</dependency>
<dependency>
<groupId>org.functionaljava</groupId>
<artifactId>functionaljava-quickcheck</artifactId>
<version>4.7</version>
</dependency>
<dependency>
<groupId>org.functionaljava</groupId>
<artifactId>functionaljava-java-core</artifactId>
<version>4.7</version>
</dependency>
<dependency>
<groupId>javax.cache</groupId>
<artifactId>cache-api</artifactId>

79
libraries/src/test/java/com/baeldung/fj/FunctionalJavaTest.java Normal file
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@ -0,0 +1,79 @@
package com.baeldung.fj;
import static org.junit.Assert.assertEquals;
import org.junit.Test;
import fj.F;
import fj.data.Array;
import fj.data.List;
import fj.data.Option;
import fj.function.Characters;
import fj.function.Integers;
public class FunctionalJavaTest {
public static final F<Integer, Boolean> isEven = i -> i % 2 == 0;
@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);
}
@Test
public void mapList_givenIntList_returnResult() {
List<Integer> fList = List.list(3, 4, 5, 6);
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);
}
@Test
public void filterList_givenIntList_returnResult() {
Array<Integer> array = Array.array(3, 4, 5, 6);
Array<Integer> filteredArray = array.filter(Integers.even);
Array<Integer> result = Array.array(4, 6);
Array<Integer> wrongResult = Array.array(3, 5);
assertEquals(filteredArray.equals(result), true);
assertEquals(filteredArray.equals(wrongResult), false);
}
@Test
public void checkForLowerCase_givenStringArray_returnResult() {
Array<String> array = Array.array("Welcome", "To", "baeldung");
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));
assertEquals(isExist, true);
assertEquals(isExist2, false);
}
@Test
public void checkOptions_givenOptions_returnResult() {
Option<Integer> n1 = Option.some(1);
Option<Integer> n2 = Option.some(2);
F<Integer, Option<Integer>> f1 = i -> i % 2 == 0 ? Option.some(i + 100) : Option.none();
Option<Integer> result1 = n1.bind(f1);
Option<Integer> result2 = n2.bind(f1);
assertEquals(result1, Option.none());
assertEquals(result2, Option.some(102));
}
@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);
}
}