BAEL-2490 Code samples (#6211)

* Added initial samples

* Added initial samples

* Awaitility updated

spring-5/src/main/java/com/baeldung/config/ScheduledConfig.java

@@ -0,0 +1,11 @@
+package com.baeldung.config;
+
+import org.springframework.context.annotation.ComponentScan;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.scheduling.annotation.EnableScheduling;
+
+@Configuration
+@EnableScheduling
+@ComponentScan("com.baeldung.scheduled")
+public class ScheduledConfig {
+}

spring-5/src/main/java/com/baeldung/scheduled/Counter.java

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+package com.baeldung.scheduled;
+
+import org.springframework.scheduling.annotation.Scheduled;
+import org.springframework.stereotype.Component;
+
+import java.util.concurrent.atomic.AtomicInteger;
+
+@Component
+public class Counter {
+    private final AtomicInteger count = new AtomicInteger(0);
+
+    @Scheduled(fixedDelay = 5)
+    public void scheduled() {
+        this.count.incrementAndGet();
+    }
+
+    public int getInvocationCount() {
+        return this.count.get();
+    }
+}

spring-5/src/test/java/com/baeldung/scheduled/ScheduledAwaitilityIntegrationTest.java

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+package com.baeldung.scheduled;
+
+import com.baeldung.config.ScheduledConfig;
+import org.awaitility.Duration;
+import org.junit.jupiter.api.Test;
+import org.springframework.boot.test.mock.mockito.SpyBean;
+import org.springframework.test.context.junit.jupiter.SpringJUnitConfig;
+
+import static org.awaitility.Awaitility.await;
+import static org.mockito.Mockito.atLeast;
+import static org.mockito.Mockito.verify;
+
+@SpringJUnitConfig(ScheduledConfig.class)
+public class ScheduledAwaitilityIntegrationTest {
+
+    @SpyBean private Counter counter;
+
+    @Test
+    public void whenWaitOneSecond_thenScheduledIsCalledAtLeastTenTimes() {
+        await()
+          .atMost(Duration.ONE_SECOND)
+          .untilAsserted(() -> verify(counter, atLeast(10)).scheduled());
+    }
+}

spring-5/src/test/java/com/baeldung/scheduled/ScheduledIntegrationTest.java

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+package com.baeldung.scheduled;
+
+import com.baeldung.config.ScheduledConfig;
+import org.junit.jupiter.api.Test;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.test.context.junit.jupiter.SpringJUnitConfig;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+@SpringJUnitConfig(ScheduledConfig.class)
+public class ScheduledIntegrationTest {
+
+    @Autowired Counter counter;
+
+    @Test
+    public void givenSleepBy100ms_whenGetInvocationCount_thenIsGreaterThanZero() throws InterruptedException {
+        Thread.sleep(100L);
+
+        assertThat(counter.getInvocationCount()).isGreaterThan(0);
+    }
+
+}