metamask-extension/app/scripts/lib/util.test.js

import { strict as assert } from 'assert';
import { isPrefixedFormattedHexString } from '../../../shared/modules/network.utils';

import {
  ENVIRONMENT_TYPE_POPUP,
  ENVIRONMENT_TYPE_NOTIFICATION,
  ENVIRONMENT_TYPE_FULLSCREEN,
  ENVIRONMENT_TYPE_BACKGROUND,
} from '../../../shared/constants/app';
import { getEnvironmentType, sufficientBalance } from './util';

describe('app utils', function () {
  describe('getEnvironmentType', function () {
    it('should return popup type', function () {
      const environmentType = getEnvironmentType(
        'http://extension-id/popup.html',
      );
      assert.equal(environmentType, ENVIRONMENT_TYPE_POPUP);
    });

    it('should return notification type', function () {
      const environmentType = getEnvironmentType(
        'http://extension-id/notification.html',
      );
      assert.equal(environmentType, ENVIRONMENT_TYPE_NOTIFICATION);
    });

    it('should return fullscreen type for home.html', function () {
      const environmentType = getEnvironmentType(
        'http://extension-id/home.html',
      );
      assert.equal(environmentType, ENVIRONMENT_TYPE_FULLSCREEN);
    });

    it('should return fullscreen type for phishing.html', function () {
      const environmentType = getEnvironmentType(
        'http://extension-id/phishing.html',
      );
      assert.equal(environmentType, ENVIRONMENT_TYPE_FULLSCREEN);
    });

    it('should return background type', function () {
      const environmentType = getEnvironmentType(
        'http://extension-id/_generated_background_page.html',
      );
      assert.equal(environmentType, ENVIRONMENT_TYPE_BACKGROUND);
    });

    it('should return the correct type for a URL with a hash fragment', function () {
      const environmentType = getEnvironmentType(
        'http://extension-id/popup.html#hash',
      );
      assert.equal(environmentType, ENVIRONMENT_TYPE_POPUP);
    });

    it('should return the correct type for a URL with query parameters', function () {
      const environmentType = getEnvironmentType(
        'http://extension-id/popup.html?param=foo',
      );
      assert.equal(environmentType, ENVIRONMENT_TYPE_POPUP);
    });

    it('should return the correct type for a URL with query parameters and a hash fragment', function () {
      const environmentType = getEnvironmentType(
        'http://extension-id/popup.html?param=foo#hash',
      );
      assert.equal(environmentType, ENVIRONMENT_TYPE_POPUP);
    });
  });

  describe('SufficientBalance', function () {
    it('returns true if max tx cost is equal to balance.', function () {
      const tx = {
        value: '0x1',
        gas: '0x2',
        gasPrice: '0x3',
      };
      const balance = '0x8';

      const result = sufficientBalance(tx, balance);
      assert.ok(result, 'sufficient balance found.');
    });

    it('returns true if max tx cost is less than balance.', function () {
      const tx = {
        value: '0x1',
        gas: '0x2',
        gasPrice: '0x3',
      };
      const balance = '0x9';

      const result = sufficientBalance(tx, balance);
      assert.ok(result, 'sufficient balance found.');
    });

    it('returns false if max tx cost is more than balance.', function () {
      const tx = {
        value: '0x1',
        gas: '0x2',
        gasPrice: '0x3',
      };
      const balance = '0x6';

      const result = sufficientBalance(tx, balance);
      assert.ok(!result, 'insufficient balance found.');
    });
  });

  describe('isPrefixedFormattedHexString', function () {
    it('should return true for valid hex strings', function () {
      assert.equal(
        isPrefixedFormattedHexString('0x1'),
        true,
        'should return true',
      );

      assert.equal(
        isPrefixedFormattedHexString('0xa'),
        true,
        'should return true',
      );

      assert.equal(
        isPrefixedFormattedHexString('0xabcd1123fae909aad87452'),
        true,
        'should return true',
      );
    });

    it('should return false for invalid hex strings', function () {
      assert.equal(
        isPrefixedFormattedHexString('0x'),
        false,
        'should return false',
      );

      assert.equal(
        isPrefixedFormattedHexString('0x0'),
        false,
        'should return false',
      );

      assert.equal(
        isPrefixedFormattedHexString('0x01'),
        false,
        'should return false',
      );

      assert.equal(
        isPrefixedFormattedHexString(' 0x1'),
        false,
        'should return false',
      );

      assert.equal(
        isPrefixedFormattedHexString('0x1 '),
        false,
        'should return false',
      );

      assert.equal(
        isPrefixedFormattedHexString('0x1afz'),
        false,
        'should return false',
      );

      assert.equal(
        isPrefixedFormattedHexString('z'),
        false,
        'should return false',
      );

      assert.equal(
        isPrefixedFormattedHexString(2),
        false,
        'should return false',
      );

      assert.equal(
        isPrefixedFormattedHexString(['0x1']),
        false,
        'should return false',
      );

      assert.equal(
        isPrefixedFormattedHexString(),
        false,
        'should return false',
      );
    });
  });
});