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obligations

v0.0.2

Published

Tiny JavaScript library for preconditions, postconditions and invariants, intended for use with Contractual.

Downloads

7

Vulnerabilities

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Links

Git

Maintainers

charlespickcharlespick

Keywords

design by contractassertionassertionspreconditionpostconditioninvariant

Readme

Obligations

Build Status

Tiny JavaScript library for preconditions, postconditions and invariants, intended for use with Contractual.

Installation

npm install obligations

Usage

var obligations = require('obligations');

obligations.precondition(1 > 0); // always ok
obligations.precondition(false); // throws a PreconditionError
obligations.precondition(0 > 1, "The world has ended!"); // throws a PreconditionError with a custom message


obligations.postcondition(1 > 0); // always ok
obligations.postcondition(false); // throws a PostconditionError
obligations.postcondition(0 > 1, "The world has ended!"); // throws a PostconditionError with a custom message

obligations.invariant(1 > 0); // always ok
obligations.invariant(false); // throws an InvariantError
obligations.invariant(0 > 1, "The world has ended!"); // throws a InvariantError with a custom message

License

MIT, see LICENSE.md.