Hystrix Testing: Circuit Breaker and Fault Tolerance Test Patterns
The Netflix/Hystrix repository demonstrates comprehensive unit testing practices using JUnit and minitest frameworks. The test suite, comprising 104 tests, focuses on verifying critical circuit breaker functionality, fallback behaviors, and metrics publishing capabilities. The testing approach emphasizes thorough validation of Hystrix's core features including command execution, threshold-based state transitions, and Spring integration patterns. Qodo Tests Hub provides developers with deep insights into Hystrix's testing patterns by organizing and analyzing its extensive test suite. Through the platform, developers can explore real-world examples of circuit breaker testing, understand fallback implementation strategies, and learn best practices for testing distributed system resilience. The repository's test cases serve as practical references for implementing robust fault tolerance testing in microservices architectures.
| Path | Test Type | Language | Description |
|---|---|---|---|
| hystrix-contrib/hystrix-javanica/src/test/java/com/netflix/hystrix/contrib/javanica/test/common/error/BasicErrorPropagationTest.java |
unit
|
java | This JUnit unit test verifies error propagation and fallback behavior in Hystrix commands for Netflix’s circuit breaker implementation. |
| hystrix-contrib/hystrix-javanica/src/test/java/com/netflix/hystrix/contrib/javanica/test/common/error/BasicObservableErrorPropagationTest.java |
unit
|
java | This JUnit unit test verifies error propagation behavior in Hystrix Observable commands including exception handling, fallback mechanisms, and error state management. |
| hystrix-contrib/hystrix-javanica/src/test/java/com/netflix/hystrix/contrib/javanica/test/spring/cache/CacheTest.java |
unit
|
java | This JUnit unit test verifies JSR-107 based caching implementation in Netflix Hystrix with Spring framework integration. |
| hystrix-contrib/hystrix-javanica/src/test/java/com/netflix/hystrix/contrib/javanica/test/spring/collapser/CollapserTest.java |
unit
|
java | This JUnit unit test verifies Hystrix’s request collapsing functionality within a Spring framework context. |
| hystrix-contrib/hystrix-javanica/src/test/java/com/netflix/hystrix/contrib/javanica/test/spring/command/jdk/CommandJdkProxyTest.java |
unit
|
java | This JUnit unit test verifies Hystrix command functionality using JDK dynamic proxies in a Spring context. |
| hystrix-contrib/hystrix-javanica/src/test/java/com/netflix/hystrix/contrib/javanica/test/spring/configuration/command/CommandDefaultPropertiesTest.java |
unit
|
java | This JUnit unit test verifies default Hystrix command properties configuration within a Spring application context. |
| hystrix-contrib/hystrix-javanica/src/test/java/com/netflix/hystrix/contrib/javanica/test/spring/configuration/fallback/FallbackDefaultPropertiesTest.java |
unit
|
java | This JUnit unit test verifies Spring-based default fallback property configurations in Hystrix using CGLIB proxies. |
| hystrix-contrib/hystrix-javanica/src/test/java/com/netflix/hystrix/contrib/javanica/test/spring/error/DefaultRaiseHystrixExceptionsTest.java |
unit
|
java | This JUnit unit test verifies default Hystrix exception handling behavior in Spring-managed services using CGLIB proxies. |
| hystrix-core/src/test/java/com/netflix/hystrix/HystrixCommandMetricsTest.java |
unit
|
java | This JUnit unit test verifies Hystrix command metrics collection, error tracking, and concurrent execution monitoring functionality. |
| hystrix-core/src/test/java/com/netflix/hystrix/HystrixCollapserTest.java |
unit
|
java | This JUnit unit test verifies the request collapsing functionality in Netflix’s Hystrix library |