BAEL-861 Introduction to Awaitlity (#2150)
* BAEL-748 quick guide to @Value * BAEL-748 changes from review * BAEL-748 inject comma-separated values into array * BAEL-768 Introduction to Netty * BAEL-768 remove commented code * BAEL-861 Introduction to Awaitility * BAEL-861 rename Test to UnitTest
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@ -366,6 +366,18 @@
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<artifactId>groovy-all</artifactId>
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<version>2.4.10</version>
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</dependency>
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<dependency>
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<groupId>org.awaitility</groupId>
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<artifactId>awaitility</artifactId>
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<version>${awaitility.version}</version>
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<scope>test</scope>
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</dependency>
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<dependency>
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<groupId>org.awaitility</groupId>
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<artifactId>awaitility-proxy</artifactId>
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<version>${awaitility.version}</version>
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<scope>test</scope>
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</dependency>
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</dependencies>
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<properties>
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<multiverse.version>0.7.0</multiverse.version>
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@ -397,6 +409,7 @@
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<junit.version>4.12</junit.version>
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<java-lsh.version>0.10</java-lsh.version>
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<pact.version>3.5.0</pact.version>
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<awaitility.version>3.0.0</awaitility.version>
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</properties>
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</project>
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@ -0,0 +1,50 @@
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package com.baeldung.awaitility;
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import java.util.concurrent.Executor;
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import java.util.concurrent.Executors;
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import java.util.concurrent.atomic.AtomicLong;
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public class AsyncService {
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private final int DELAY = 1000;
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private final int INIT_DELAY = 2000;
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private AtomicLong value = new AtomicLong(0);
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private Executor executor = Executors.newFixedThreadPool(4);
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private volatile boolean initialized = false;
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public void initialize() {
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executor.execute(() -> {
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sleep(INIT_DELAY);
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initialized = true;
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});
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}
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public boolean isInitialized() {
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return initialized;
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}
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public void addValue(long val) {
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if (!isInitialized()) {
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throw new IllegalStateException("Service is not initialized");
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}
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executor.execute(() -> {
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sleep(DELAY);
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value.addAndGet(val);
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});
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}
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public long getValue() {
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if (!isInitialized()) {
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throw new IllegalStateException("Service is not initialized");
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}
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return value.longValue();
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}
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private void sleep(int delay) {
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try {
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Thread.sleep(delay);
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} catch (InterruptedException e) {
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e.printStackTrace();
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}
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}
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}
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@ -0,0 +1,84 @@
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package com.baeldung.awaitility;
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import static org.awaitility.Awaitility.await;
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import static org.awaitility.Awaitility.fieldIn;
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import static org.awaitility.Awaitility.given;
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import static org.awaitility.proxy.AwaitilityClassProxy.to;
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import static org.hamcrest.Matchers.equalTo;
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import java.util.concurrent.Callable;
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import java.util.concurrent.TimeUnit;
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import org.awaitility.Awaitility;
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import org.awaitility.Duration;
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import org.junit.Before;
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import org.junit.Test;
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public class AsyncServiceUnitTest {
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private AsyncService asyncService;
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@Before
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public void setUp() {
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asyncService = new AsyncService();
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}
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@Test
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public void givenAsyncService_whenInitialize_thenInitOccurs1() {
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asyncService.initialize();
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Callable<Boolean> isInitialized = () -> asyncService.isInitialized();
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await().until(isInitialized);
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}
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@Test
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public void givenAsyncService_whenInitialize_thenInitOccurs2() {
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asyncService.initialize();
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Callable<Boolean> isInitialized = () -> asyncService.isInitialized();
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await().atLeast(Duration.ONE_HUNDRED_MILLISECONDS)
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.atMost(Duration.FIVE_SECONDS)
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.with().pollInterval(Duration.ONE_HUNDRED_MILLISECONDS)
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.until(isInitialized);
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}
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@Test
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public void givenAsyncService_whenInitialize_thenInitOccurs_withDefualts() {
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Awaitility.setDefaultPollInterval(10, TimeUnit.MILLISECONDS);
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Awaitility.setDefaultPollDelay(Duration.ZERO);
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Awaitility.setDefaultTimeout(Duration.ONE_MINUTE);
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asyncService.initialize();
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await().until(() -> asyncService.isInitialized());
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}
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@Test
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public void givenAsyncService_whenInitialize_thenInitOccurs_withProxy() {
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asyncService.initialize();
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await().untilCall(to(asyncService).isInitialized(), equalTo(true));
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}
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@Test
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public void givenAsyncService_whenInitialize_thenInitOccurs3() {
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asyncService.initialize();
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await().until(fieldIn(asyncService)
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.ofType(boolean.class)
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.andWithName("initialized"), equalTo(true));
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}
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@Test
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public void givenValue_whenAddValue_thenValueAdded() {
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asyncService.initialize();
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await().until(() -> asyncService.isInitialized());
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long value = 5;
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asyncService.addValue(value);
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await().until(asyncService::getValue, equalTo(value));
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}
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@Test
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public void givenAsyncService_whenGetValue_thenExceptionIgnored() {
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asyncService.initialize();
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given().ignoreException(IllegalStateException.class)
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.await()
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.atMost(Duration.FIVE_SECONDS)
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.atLeast(Duration.FIVE_HUNDRED_MILLISECONDS)
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.until(asyncService::getValue, equalTo(0L));
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}
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}
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