as-procedure/dist/logic/withExpectOutput.js

easily create procedures within a pit-of-success

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