add-matchers/dist/jest.js

Write useful test matchers compatible with Jest and Jasmine.

"use strict";
exports.__esModule = true;
exports.getJestAdapter = function (scope) {
    var getLongName = function (name) {
        return name.replace(/\B([A-Z])/g, ' $1').toLowerCase();
    };
    var createToBeMatcher = function (name, matcher) {
        return function (received) {
            var _this = this;
            var args = [];
            for (var _i = 1; _i < arguments.length; _i++) {
                args[_i - 1] = arguments[_i];
            }
            var arity = matcher.length - 1;
            var realArgs = args.slice(0, arity);
            var pass = matcher.apply(void 0, realArgs.concat([received]));
            var infix = pass ? ' not ' : ' ';
            var longName = getLongName(name);
            var formattedReceived = this.utils.printReceived(received);
            var formattedArgs = args
                .map(function (val) { return _this.utils.printExpected(val); })
                .join(', ');
            var message = "expected " + formattedReceived + infix + longName + " " + formattedArgs;
            return { message: function () { return message; }, pass: pass };
        };
    };
    var createToHaveMatcher = function (name, matcher) {
        return function (received, key) {
            var _this = this;
            var args = [];
            for (var _i = 2; _i < arguments.length; _i++) {
                args[_i - 2] = arguments[_i];
            }
            var arity = matcher.length - 2;
            var realArgs = args.slice(0, arity);
            var pass = matcher.apply(void 0, [key].concat(realArgs, [received]));
            var infix = pass ? ' not ' : ' ';
            var longName = getLongName(name);
            var formattedReceived = this.utils.printReceived(received);
            var formattedArgs = args
                .map(function (val) { return _this.utils.printExpected(val); })
                .join(', ');
            var message = "expected member \"" + key + "\" of " + formattedReceived + infix + longName + " " + formattedArgs;
            return { message: function () { return message; }, pass: pass };
        };
    };
    var createJestMatcher = function (name, matcher) {
        var _a;
        var isMemberMatcher = name.search(/^toHave/) !== -1;
        var adapter = isMemberMatcher ? createToHaveMatcher : createToBeMatcher;
        var matchersByName = (_a = {}, _a[name] = adapter(name, matcher), _a);
        scope.expect.extend(matchersByName);
        return matchersByName;
    };
    return createJestMatcher;
};