BAEL-2490 Code samples (#6211)

* Added initial samples

* Added initial samples

* Awaitility updated

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

@@ -0,0 +1,24 @@
+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

@@ -0,0 +1,22 @@
+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);
+    }
+
+}