Application cases of the AWAITILITY framework in the Java class library
Awaitility is a Java class library for writing asynchronous testing.It provides a simple and elegant way to wait for the implementation of asynchronous code and can easily assert the results.
Below is an application case using the AWAITILITY framework:
Scene: Suppose we are developing an online mall system. Our business logic is that users need to send an order to confirm the email to the user after placing an order.We want to write a test to verify the order to confirm whether the mail is sent to the user within the specified time.
First, we need to introduce the dependencies of Awaitility in the pom.xml file of the project:
<dependencies>
...
<dependency>
<groupId>org.awaitility</groupId>
<artifactId>awaitility</artifactId>
<version>3.0.0</version>
<scope>test</scope>
</dependency>
...
</dependencies>
Next, we can write a test case to verify the order to confirm whether the mail is sent to the user within the specified time:
import org.junit.Test;
import static org.awaitility.Awaitility.*;
import static org.hamcrest.Matchers.*;
public class EmailServiceTest {
@Test
public void testOrderConfirmationEmail() {
EmailService emailService = new EmailService();
OrderService orderService = new OrderService();
// Simulates the user to open an order and place an order
orderService.placeOrder();
// Use Awaitility to wait for 5 seconds, until the assertion conditions of the successful sending of the mail are satisfied
await().atMost(5, SECONDS)
.until(emailService::isOrderConfirmationEmailSent, equalTo(true));
}
}
You also need to write code of the EmailService class and the OrderService class, which can be adjusted according to the actual situation.
public class EmailService {
public boolean isOrderConfirmationEmailSent() {
// Judging the logic of the successful delivery of the order to confirm whether the mail sends out
// Return TRUE to indicate that the email is successfully sent, and return false to indicate that the mail sending fails
}
}
public class OrderService {
public void placeOrder() {
// Simulate the logic of placing orders for users
}
}
In this test case, we use the Await () method of Awaitility to wait for the conditions to meet.The ATMOST () method specifies the longest waiting time until the conditions are met or over the longest waiting time.The UNTIL (() method is used to specify the assertion conditions. Here we use the IsorderConfirmationMailSENT () method in the EmailService class to assert.The Equalto () method is used to specify the result of assertion.
By using AWAITILITY, we can elegantly wait for the implementation of the asynchronous code and conduct an assertion verification within the specified time to ensure the accuracy and stability of the test.
In addition to the above application cases, Awaitility can also be used for other test scenarios that need to wait for the execution of asynchronous code, such as waiting for the thread pool task to be completed, waiting for the database operation, and so on.
