@push.rocks/smartexpect/ts/namespaces/type.ts

A testing library to manage expectations in code, offering both synchronous and asynchronous assertion methods.

import { Assertion } from '../smartexpect.classes.assertion.js';
import type { TExecutionType } from '../types.js';

/**
 * Namespace for type-based matchers
 */
export class TypeMatchers<M extends TExecutionType> {
  constructor(private assertion: Assertion<any, M>) {}

  toBeTypeofString() {
    return this.assertion.customAssertion(
      (v) => typeof v === 'string',
      `Expected type to be 'string'`
    );
  }

  toBeTypeofNumber() {
    return this.assertion.customAssertion(
      (v) => typeof v === 'number',
      `Expected type to be 'number'`
    );
  }

  toBeTypeofBoolean() {
    return this.assertion.customAssertion(
      (v) => typeof v === 'boolean',
      `Expected type to be 'boolean'`
    );
  }

  toBeTypeOf(typeName: string) {
    return this.assertion.customAssertion(
      (v) => typeof v === typeName,
      `Expected type to be '${typeName}'`
    );
  }

  toBeDefined() {
    return this.assertion.customAssertion(
      (v) => v !== undefined,
      `Expected value to be defined`
    );
  }
}