@Test
    void verifyLowerCaseTransformerWithTrim() {
        val transformer = new ConvertCasePrincipalNameTransformer();
        val result = transformer.transform("   UID  ");
        assertEquals("uid", result);
    }
Tests for the switch-case transformer.

@author Misagh Moayyed
@since 4.1.0
core/cas-server-core-authentication/src/test/java/org/apereo/cas/authentication/handler/ConvertCasePrincipalNameTransformerTests.java