@Test
    void verifyExpression() {
        val registry = mock(FlowDefinitionRegistry.class);
        val fbs = mock(FlowBuilderServices.class);
        when(fbs.getConversionService()).thenReturn(mock(ConversionService.class));
        val cfg = new AbstractCasWebflowConfigurer(fbs,
            registry, new StaticApplicationContext(), new CasConfigurationProperties()) {
        };
        val action = new EvaluateAction(cfg.createExpression("example"), cfg.createExpression("result"));
        assertNotNull(cfg.getExpressionStringFromAction(action));
    }
This is {@link CasWebflowConfigurerTests}.

@author Misagh Moayyed
@since 6.2.0
core/cas-server-core-webflow/src/test/java/org/apereo/cas/web/flow/configurer/CasWebflowConfigurerTests.java