ow/dist/predicates/weak-map.js

Function argument validation for humans

import hasItems from '../utils/has-items.js';
import { Predicate } from './predicate.js';
export class WeakMapPredicate extends Predicate {
    /**
    @hidden
    */
    constructor(options) {
        super('WeakMap', options);
    }
    /**
    Test a WeakMap to include all the provided keys. The keys are tested by identity, not structure.

    @param keys - The keys that should be a key in the WeakMap.
    */
    hasKeys(...keys) {
        return this.addValidator({
            message: (_, label, missingKeys) => `Expected ${label} to have keys \`${JSON.stringify(missingKeys)}\``,
            validator: map => hasItems(map, keys),
        });
    }
    /**
    Test a WeakMap to include any of the provided keys. The keys are tested by identity, not structure.

    @param keys - The keys that could be a key in the WeakMap.
    */
    hasAnyKeys(...keys) {
        return this.addValidator({
            message: (_, label) => `Expected ${label} to have any key of \`${JSON.stringify(keys)}\``,
            validator: map => keys.some(key => map.has(key)),
        });
    }
}