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Future in Vavr

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This commit is contained in:
Ahmed Tawila 2017-12-04 00:09:43 +02:00
parent 53a84bf789
commit a523437dc0
3 changed files with 149 additions and 57 deletions
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57
vavr/src/main/java/com/vavr/future/Tester.java
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package com.vavr.future;
import static org.junit.Assert.assertEquals;
import java.util.concurrent.ExecutorService;
import org.junit.Test;
import io.vavr.concurrent.Future;
public class Tester {
@Test
public void whenAppendData_thenCorrect() {
String initialValue = "Welcome to ";
Future<String> resultFuture = Future.of(() -> appendData(initialValue));
String result = resultFuture.get();
assertEquals("Welcome to Baeldung!", result);
}
@Test
public void whenAppendData_thenSuccess() {
String initialValue = "Welcome to ";
Future<String> resultFuture = Future.of(() -> appendData(initialValue))
.onSuccess(finalResult -> System.out.println("Successfully Completed - Result: " + finalResult))
.onFailure(finalResult -> System.out.println("Failed - Result: " + finalResult));
String result = resultFuture.get();
assertEquals("Welcome to Baeldung!", result);
}
@Test
public void whenChainingCallbacks_thenCorrect() {
String initialValue = "Welcome to ";
Future<String> resultFuture = Future.of(() -> appendData(initialValue))
.andThen(finalResult -> System.out.println("Completed - 1: " + finalResult))
.andThen(finalResult -> System.out.println("Completed - 2: " + finalResult));
String result = resultFuture.get();
assertEquals("Welcome to Baeldung!", result);
}
@Test
public void whenCallAwait_thenCorrect() {
String initialValue = "Welcome to ";
Future<String> resultFuture = Future.of(() -> appendData(initialValue));
resultFuture = resultFuture.await();
String result = resultFuture.get();
assertEquals("Welcome to Baeldung!", result);
}
public String appendData(String initial) {
return initial + "Baeldung!";
}
}

12
vavr/src/main/java/com/vavr/future/Util.java Normal file
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package com.vavr.future;
public class Util {
public static String appendData(String initial) {
return initial + "Baeldung!";
}
public static int divideByZero(int num) {
return num / 0;
}
}

137
vavr/src/test/java/com/vavr/future/FutureTest.java Normal file
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package com.vavr.future;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertFalse;
import static org.junit.Assert.assertTrue;
import java.util.concurrent.CompletableFuture;
import java.util.concurrent.ExecutionException;
import org.junit.Test;
import io.vavr.Tuple;
import io.vavr.Tuple2;
import io.vavr.concurrent.Future;
import io.vavr.control.Option;
import io.vavr.control.Try;
public class FutureTest {
@Test
public void whenAppendData_thenCorrect1() {
String initialValue = "Welcome to ";
Future<String> resultFuture = Future.of(() -> Util.appendData(initialValue));
String result = resultFuture.get();
assertEquals("Welcome to Baeldung!", result);
}
@Test
public void whenAppendData_thenCorrect2() {
String initialValue = "Welcome to ";
Future<String> resultFuture = Future.of(() -> Util.appendData(initialValue));
resultFuture.await();
Option<Try<String>> futureOption = resultFuture.getValue();
Try<String> futureTry = futureOption.get();
String result = futureTry.get();
assertEquals("Welcome to Baeldung!", result);
}
@Test
public void whenAppendData_thenSuccess() {
String initialValue = "Welcome to ";
Future<String> resultFuture = Future.of(() -> Util.appendData(initialValue))
.onSuccess(finalResult -> System.out.println("Successfully Completed - Result: " + finalResult))
.onFailure(finalResult -> System.out.println("Failed - Result: " + finalResult));
String result = resultFuture.get();
assertEquals("Welcome to Baeldung!", result);
}
@Test
public void whenChainingCallbacks_thenCorrect() {
String initialValue = "Welcome to ";
Future<String> resultFuture = Future.of(() -> Util.appendData(initialValue))
.andThen(finalResult -> System.out.println("Completed - 1: " + finalResult))
.andThen(finalResult -> System.out.println("Completed - 2: " + finalResult));
String result = resultFuture.get();
assertEquals("Welcome to Baeldung!", result);
}
@Test
public void whenCallAwait_thenCorrect() {
String initialValue = "Welcome to ";
Future<String> resultFuture = Future.of(() -> Util.appendData(initialValue));
resultFuture = resultFuture.await();
String result = resultFuture.get();
assertEquals("Welcome to Baeldung!", result);
}
@Test
public void whenDivideByZero_thenGetThrowable1() {
Future<Integer> resultFuture = Future.of(() -> Util.divideByZero(10));
Future<Throwable> throwableFuture = resultFuture.failed();
Throwable throwable = throwableFuture.get();
assertEquals("/ by zero", throwable.getMessage());
}
@Test
public void whenDivideByZero_thenGetThrowable2() {
Future<Integer> resultFuture = Future.of(() -> Util.divideByZero(10));
resultFuture.await();
Option<Throwable> throwableOption = resultFuture.getCause();
Throwable throwable = throwableOption.get();
assertEquals("/ by zero", throwable.getMessage());
}
@Test
public void whenDivideByZero_thenCorrect() throws InterruptedException {
Future<Integer> resultFuture = Future.of(() -> Util.divideByZero(10));
resultFuture.await();
assertTrue(resultFuture.isCompleted());
assertFalse(resultFuture.isSuccess());
assertTrue(resultFuture.isFailure());
}
@Test
public void whenAppendData_thenFutureNotEmpty() {
String initialValue = "Welcome to ";
Future<String> resultFuture = Future.of(() -> Util.appendData(initialValue));
resultFuture.await();
assertFalse(resultFuture.isEmpty());
}
@Test
public void whenCallZip_thenCorrect() {
Future<Tuple2<String, Integer>> future = Future.of(() -> "John")
.zip(Future.of(() -> new Integer(5)));
future.await();
assertEquals(Tuple.of("John", new Integer(5)), future.get());
}
@Test
public void whenAppendData_thenFutureNotEmptyd() throws InterruptedException, ExecutionException {
String initialValue = "Welcome to ";
Future<String> resultFuture = Future.of(() -> Util.appendData(initialValue));
CompletableFuture<String> convertedFuture = resultFuture.toCompletableFuture();
assertEquals("Welcome to Baeldung!", convertedFuture.get());
}
@Test
public void whenCallMap_thenCorrect() {
Future<String> futureResult = Future.of(() -> new StringBuilder("from Baeldung"))
.map(a -> "Hello " + a);
futureResult.await();
assertEquals("Hello from Baeldung", futureResult.get());
}
}