@Test
    public void testBlankLogoutUrlPattern() {
        logoutUrlPattern = Pac4jConstants.EMPTY_STRING;
        TestsHelper.expectException(this::call, TechnicalException.class, "logoutUrlPattern cannot be blank");
    }
Tests {@link DefaultLogoutLogic}.

@author Jerome Leleu
@since 1.9.0
pac4j-core/src/test/java/org/pac4j/core/engine/DefaultLogoutLogicTests.java