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if (typeof window === 'object') {  global = window;} else {  global.chai = require('../..');}
var isStackSupported = false;if (typeof Error.captureStackTrace !== 'undefined') {  try {    throw Error();  } catch (err) {    if (typeof err.stack !== 'undefined') isStackSupported = true;  }}
/** * Validate that the given function throws an error. * * By default, also validate that the thrown error's stack trace doesn't contain * Chai implementation frames. Stack trace validation can be disabled by * providing a truthy `skipStackTest` argument. * * Optionally validate some additional properties of the error: * * If val is a string, validate val equals the error's .message * If val is a regex, validate val matches the error's .message * If val is an object, validate val's props are included in the error object * * @param {Function} function that's expected to throw an error * @param {Mixed} expected properties of the expected error * @param {Boolean} skipStackTest if truthy, don't validate stack trace */
global.err = function globalErr (fn, val, skipStackTest) {  if (chai.util.type(fn) !== 'function')    throw new chai.AssertionError('Invalid fn');
  try {    fn();  } catch (err) {    if (isStackSupported && !skipStackTest) {      chai.expect(err).to.have.property('stack')        .that.has.string('globalErr')        .but.does.not.match(          /at [a-zA-Z]*(Getter|Wrapper|(\.)*assert)/,          'implementation frames not properly filtered from stack trace'        );    }
    switch (chai.util.type(val).toLowerCase()) {      case 'undefined': return;      case 'string': return chai.expect(err.message).to.equal(val);      case 'regexp': return chai.expect(err.message).to.match(val);      case 'object': return Object.keys(val).forEach(function (key) {        chai.expect(err).to.have.property(key).and.to.deep.equal(val[key]);      });    }
    throw new chai.AssertionError('Invalid val');  }
  throw new chai.AssertionError('Expected an error');};