'use strict';

// V8 uses a different message format when reading properties of null or undefined.

// Older versions use e.g. "Cannot read property 'world' of undefined"

// Newer versions use e.g. "Cannot read properties of undefined (reading 'world')"

// This file overrides the built-in toThrow() matches to handle both cases,

// enabling the React project to support Node 12-16 without forking tests.

const toThrowMatchers = require('expect/build/toThrowMatchers').default;

const builtInToThrow = toThrowMatchers.toThrow;

// Detect the newer stack format:

let newErrorFormat = false;

try {

  null.test();

} catch (error) {

  if (error.message.includes('Cannot read properties of null')) {

    newErrorFormat = true;

  }

}

// Detect the message pattern we need to rename:

const regex = /Cannot read property '([^']+)' of (.+)/;

// Massage strings (written in the older format) to match the newer format

// if tests are currently running on Node 16+

function normalizeErrorMessage(message) {

  if (newErrorFormat) {

    const match = message.match(regex);

    if (match) {

      return `Cannot read properties of ${match[2]} (reading '${match[1]}')`;

    }

  }

  return message;

}

function toThrow(value, expectedValue) {

  if (typeof expectedValue === 'string') {

    expectedValue = normalizeErrorMessage(expectedValue);

  } else if (expectedValue instanceof Error) {

    expectedValue.message = normalizeErrorMessage(expectedValue.message);

  }

  return builtInToThrow.call(this, value, expectedValue);

}

module.exports = {

  toThrow,

};