dts-jest/lib/remap.js

A preprocessor for Jest to snapshot test TypeScript declaration (.d.ts) files

"use strict";
exports.__esModule = true;
var jest_snapshot_parser = require("jest-snapshot-parser");
var _ts = require("typescript");
var definitions_1 = require("./definitions");
var create_source_file_1 = require("./utils/create-source-file");
var find_triggers_1 = require("./utils/find-triggers");
var get_snapshot_description_1 = require("./utils/get-snapshot-description");
var normalize_trigger_header_methods_1 = require("./utils/normalize-trigger-header-methods");
exports.remap = function (source_content, snapshot_content, options) {
    if (options === void 0) { options = {}; }
    var _a = options.typescript, ts = _a === void 0 ? _ts : _a, _b = options.source_filename, source_filename = _b === void 0 ? '' : _b;
    var parsed_snapshot = typeof snapshot_content === 'string'
        ? jest_snapshot_parser.parse(snapshot_content)
        : snapshot_content;
    var source_file = create_source_file_1.create_source_file(source_filename, source_content, ts);
    var triggers = find_triggers_1.find_triggers(source_file, ts);
    normalize_trigger_header_methods_1.normalize_trigger_header_methods(triggers.map(function (trigger) { return trigger.header; }));
    var source_line_contents = source_content.split('\n');
    var counters = {};
    triggers
        .filter(function (trigger) {
        return trigger.header.method === definitions_1.TestMethod.Test &&
            trigger.header.flags & definitions_1.TriggerHeaderFlags[':snap'];
    })
        .forEach(function (trigger) {
        var description = get_snapshot_description_1.get_snapshot_description(trigger);
        var counter = get_increased_counter(description);
        var title = description + " " + counter;
        if (!(title in parsed_snapshot)) {
            throw new Error("Unmatched snapshot title `" + title + "`");
        }
        var snapshot_value = parsed_snapshot[title];
        if (typeof snapshot_value !== 'string') {
            var snapshot_display_value = JSON.stringify(snapshot_value);
            throw new Error("Snapshot value should be a string, but got " + snapshot_display_value);
        }
        var snapshot_value_first_line = snapshot_value.split('\n')[0];
        var header = trigger.header;
        source_line_contents[header.line] += " -> " + snapshot_value_first_line;
    });
    return source_line_contents.join('\n');
    function get_increased_counter(title) {
        return (counters[title] = title in counters ? counters[title] + 1 : 1);
    }
};