Cadmus is a lightweight library which allows specifications on function return values which are checked at runtime.
var user = t.shape({
name: t.string,
grades: t.arrayOf(t.shape({
subject: t.string,
grade: t.number,
})),
gender: t.oneOf(['M', 'F']).optional,
});
@returns(user)
getUser() {
return {
name: 'John',
gender: 'M',
grades: [
grade: 5,
],
};
}
getUser() // Error thrown, since grades.subject is missingPossible signature objects are:
array
bool
date
func
null
number
object
string
any
arrayOf(<type>)
instanceOf(<object>)
oneOf([...<allowableValues>])
oneOfType([...<allowableTypes])
shape({...<map of keyName to signature>})
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