as-procedure/dist/logic/withExpectOutkey.js

easily create procedures within a pit-of-success

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.withExpectOutkey = void 0;
const error_fns_1 = require("@ehmpathy/error-fns");
const HasName_1 = require("../domain/HasName");
const withExpectOutkey = (procedure) => {
    const wrapped = (...args) => {
        // define an error which has access to the original call.stack, so we can trace the stack to the root caller, since promises loose their chain
        const errorFromOriginalCall = new error_fns_1.HelpfulError('expect.outkey: call', {
            procedure: (0, HasName_1.getName)(procedure),
            input: args[0],
        });
        // invoke the request
        const promise = procedure(...args);
        // add the expect wrapper
        const expect = async (key) => {
            const output = await promise;
            const outputOfKey = output[key];
            if (!outputOfKey)
                throw new error_fns_1.HelpfulError('expect.outkey: breach: key is not present in output', {
                    cause: errorFromOriginalCall,
                    procedure: (0, HasName_1.getName)(procedure),
                    key,
                    output,
                });
            const assured = { [key]: outputOfKey };
            return assured;
        };
        const extended = Object.assign(promise, { expect });
        return extended;
    };
    return wrapped;
};
exports.withExpectOutkey = withExpectOutkey;
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