Created
September 11, 2019 11:00
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How to unit test Spel (Spring Expression Language) expressions against standard web context
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| @RunWith(SpringRunner.class) | |
| @TestPropertySource("classpath:server-test.properties") | |
| public class SpelUnitTest { | |
| public static final Logger logger = LoggerFactory.getLogger(Sample.class); | |
| @Value("${testclock.start}") | |
| private String startTime; | |
| @Autowired | |
| private BeanFactory beanFactory; | |
| @Autowired | |
| private StandardEvaluationContext _evaluationContext; | |
| private ExpressionParser _parser = new SpelExpressionParser(); | |
| @Test | |
| public void foo() { | |
| final String randomPhrase = _parser.parseExpression("T(java.lang.Math).random()") | |
| .getValue(_evaluationContext, String.class); | |
| logger.info("randomPhrase: random number is {}", randomPhrase); | |
| } | |
| @Test | |
| public void bar() { | |
| final Instant value = _parser.parseExpression("T(java.time.Instant).parse('2015-05-15T12:23:45.678Z')") | |
| .getValue(_evaluationContext, Instant.class); | |
| logger.info("bar: {}", value); | |
| } | |
| @Test | |
| public void fizz() { | |
| final Instant value = _parser.parseExpression("T(java.time.Instant).parse(@environment.getProperty('testclock.start'))") | |
| .getValue(_evaluationContext, Instant.class); | |
| logger.info("fizz: {}", value); | |
| } | |
| @Test | |
| public void buzz() { | |
| Assertions.assertThat(startTime).isNotBlank(); | |
| logger.info("buzz: {}", startTime); | |
| } | |
| @TestConfiguration | |
| public static class TestConfig { | |
| @Bean | |
| public BeanFactoryResolver beanFactoryResolver(BeanFactory beanFactory) { | |
| return new BeanFactoryResolver(beanFactory); | |
| } | |
| @Bean | |
| public StandardEvaluationContext evaluationContext(BeanFactoryResolver beanFactoryResolver) { | |
| final StandardEvaluationContext evaluationContext = new StandardEvaluationContext(); | |
| evaluationContext.setBeanResolver(beanFactoryResolver); | |
| return evaluationContext; | |
| } | |
| } | |
| } |
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