NativeScript/tests/app/pages/file-load-test.ts

import { Page, Label, knownFolders, path, ModuleNameResolver } from "@nativescript/core";

export function createPage() {
    var page = new Page();
    var lbl = new Label();

    var moduleName = "tests/pages/files/test";

    ModuleNameResolver
    var resolver = new ModuleNameResolver({
        width: 400,
        height: 600,
        os: "android",
        deviceType: "phone"
    });

    // Current app full path.
    var currentAppPath = knownFolders.currentApp().path;
    var moduleNamePath = path.join(currentAppPath, moduleName);

    var fileName = resolver.resolveFileName(moduleNamePath, "xml");
    lbl.text = fileName;
    lbl.textWrap = true;

    page.content = lbl;

    return page;
}