A set of predicates and assertions for checking the properties of models. Most of the documentation is on the assertive page. End-users will usually want to use assertive directly.
To install the stable version, type:
install.packages("assertive.models")To install the development version, you first need the devtools package.
install.packages("devtools")Then you can install the assertive.models package using
library(devtools)
install_bitbucket("richierocks/assertive.models")has_terms checks whether or not an object has a terms attribute or component.
is_empty_model and is_non_empty_model check whether a model is empty or not.
Predicates all return a single logical value and have one corresponding assertion. For example, has_terms has assert_has_terms.