Assertio

Assertio is a tiny assertion library, similar to Node's built-in assert.
It makes testing much easier by giving you lots of assertions you can run against your code.

Assertations

* assert(value: boolean, msg?)
* assertValue(value, predicate, msg?)
* assertFn(value: () => boolean, msg?)
* ensureArray(value, msg?)
* ensureObject(value, msg?)
* ensureString(value, msg?)
* ensureNumber(value, msg?)
* ensureBoolean(value, msg?)
* ensureNonVoid(value, msg?)
* ensureNonNull(value, msg?)
* ensureNonNullable(value, msg?)
* nonVoid(value, msg?)
* nonNull(value, msg?)
* nonNullable(value, msg?)
* never(msg?)
* neverValue(value, msg?)
* castValue(value)
* cast(value)
* as(value)
* maybe(value)

TypeScript transformer plugin

Assertio has a typescript transformer plugin to remove all assertations on production.
See how to use typescript plugins https://github.com/cevek/ttypescript

tsconfig.json
``
{
"compilerOptions": {
// ...
"plugins": [
{ "transform": "assertio/transform" },
]
}
}
``