Annotation: assert.is_null

CREATE OR REPLACE FUNCTION assert.is_null(anyelement, OUT message text, OUT result boolean)
RETURNS record

Information: assert.is_null

Schema	assert
Function Name	is_null
Arguments	anyelement, OUT message text, OUT result boolean
Owner	postgres
Result Type	record
Description

Implementation: assert.is_null

CREATE OR REPLACE FUNCTION assert.is_null(anyelement, OUT message text, OUT result boolean)
 RETURNS record
 LANGUAGE plpgsql
 IMMUTABLE STRICT
AS $function$
BEGIN
    IF($1 IS NULL) THEN
        message := 'Assert is NULL.';
        PERFORM assert.ok(message);
        result := true;
        RETURN;
    END IF;
    
    message := E'ASSERT IS_NULL FAILED. NULL value was expected.\n\n\n';    
    PERFORM assert.fail(message);
    result := false;
    RETURN;
END
$function$