Filter filter = searchRequest.getFilter();
assertTrue( filter instanceof AttributeValueAssertionFilter );
AttributeValueAssertionFilter approxMatchFilter = ( AttributeValueAssertionFilter ) filter;
assertEquals( LdapConstants.EQUALITY_MATCH_FILTER, approxMatchFilter.getFilterType() );
AttributeValueAssertion assertion = approxMatchFilter.getAssertion();
assertEquals( "sn", assertion.getAttributeDesc() );
assertEquals( "DSMLv2.0 rocks!!", new String( ( byte[] ) assertion.getAssertionValue().get() ) );
}