@vapurrmaid/validate v0.3.6

Validate

An incredibly simple, zero-dependency package for writing maintainable, easy-to-read, validation assertions. This package is highly inspired by:

• The Java package org.apache.commons.lang3.Validate and its use in the DDD community
• BDD-style assertions used in Jest and chai

Usage of Validate is an opinionated, stylistic preference. Other options exists - see the example usage to get a feel for how Validate can improve code style.

Example Usage

Without:

class PositiveNumber {
  public readonly value: number;

  constructor(i: number) {
    if (i <= 0) {
      throw new Error(`i must be greater than 0. Instead received ${i}`);
    }
    this.value = i;
  }
}

With:

import { Validate } from '@vapurrmaid/validate';

class PositiveNumber {
  public readonly value: number;

  constructor(i: number) {
    Validate.isTrue(i > 0, `i must be greater than 0. Instead received ${i}`);
    this.value = i;
  }
}