ts-cast/lib/engine/to-be.js

Runtime typechecking

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.toBe = void 0;
var names_1 = require("../helpers/names");
var throw_type_error_1 = require("./throw-type-error");
var spy = function (fn) {
    var isCalled = false;
    var result = function () {
        var args = [];
        for (var _i = 0; _i < arguments.length; _i++) {
            args[_i] = arguments[_i];
        }
        isCalled = true;
        return fn.apply(void 0, args);
    };
    Object.defineProperty(result, 'isCalled', {
        get: function () { return isCalled; },
    });
    return result;
};
var toBe = function (casterFn, predicate, typeName) {
    if (typeName === void 0) { typeName = "".concat(casterFn.name, "<").concat(predicate.name, ">"); }
    return (0, names_1.withName)(function (value, context, reportError) {
        if (reportError === void 0) { reportError = throw_type_error_1.throwTypeError; }
        var spyReportError = spy(reportError);
        var typedValue = casterFn(value, context, spyReportError);
        if (spyReportError.isCalled)
            return typedValue;
        if (!predicate(typedValue)) {
            reportError("".concat(typeName, " expected").concat(context ? " in ".concat(context) : '', " but \"").concat(value, "\" received."), context);
            return undefined;
        }
        return typedValue;
    }, typeName);
};
exports.toBe = toBe;