ConditionalOnExpressionTests Class — spring-boot Architecture

Source Code

core/spring-boot-autoconfigure/src/test/java/org/springframework/boot/autoconfigure/condition/ConditionalOnExpressionTests.java lines 40–113

class ConditionalOnExpressionTests {

	private final ApplicationContextRunner contextRunner = new ApplicationContextRunner();

	@Test
	void expressionIsTrue() {
		this.contextRunner.withUserConfiguration(BasicConfiguration.class)
			.run((context) -> assertThat(context.getBean("foo")).isEqualTo("foo"));
	}

	@Test
	void expressionEvaluatesToTrueRegistersBean() {
		this.contextRunner.withUserConfiguration(MissingConfiguration.class)
			.run((context) -> assertThat(context).doesNotHaveBean("foo"));
	}

	@Test
	void expressionEvaluatesToFalseDoesNotRegisterBean() {
		this.contextRunner.withUserConfiguration(NullConfiguration.class)
			.run((context) -> assertThat(context).doesNotHaveBean("foo"));
	}

	@Test
	void expressionEvaluationWithNoBeanFactoryDoesNotMatch() {
		OnExpressionCondition condition = new OnExpressionCondition();
		MockEnvironment environment = new MockEnvironment();
		ConditionContext conditionContext = mock(ConditionContext.class);
		given(conditionContext.getEnvironment()).willReturn(environment);
		ConditionOutcome outcome = condition.getMatchOutcome(conditionContext, mockMetadata("invalid-spel"));
		assertThat(outcome.isMatch()).isFalse();
		assertThat(outcome.getMessage()).contains("invalid-spel").contains("no BeanFactory available");
	}

	private AnnotatedTypeMetadata mockMetadata(String value) {
		AnnotatedTypeMetadata metadata = mock(AnnotatedTypeMetadata.class);
		given(metadata.getAnnotationAttributes(ConditionalOnExpression.class.getName()))
			.willReturn(Collections.singletonMap("value", value));
		return metadata;
	}

	@Configuration(proxyBeanMethods = false)
	@ConditionalOnExpression("false")
	static class MissingConfiguration {

		@Bean
		String bar() {
			return "bar";
		}

	}

	@Configuration(proxyBeanMethods = false)
	@ConditionalOnExpression("true")
	static class BasicConfiguration {

		@Bean
		String foo() {
			return "foo";
		}

	}

	@Configuration(proxyBeanMethods = false)
	@ConditionalOnExpression("true ? null : false")
	static class NullConfiguration {

		@Bean
		String foo() {
			return "foo";
		}

	}

}