text: const { hashMessage, signMessage } = require('../helpers/sign');
  const { expectThrow } = require('../helpers/expectThrow');
  
  const ECRecoveryMock = artifacts.require('ECRecoveryMock');
  
  require('chai')
    .should();
  
  contract('ECRecovery', function ([_, anyone]) {
    let ecrecovery;
    const TEST_MESSAGE = 'OpenZeppelin';
  
    beforeEach(async function () {
      ecrecovery = await ECRecoveryMock.new();
    });
  
    it('recover v0', async function () {
      // Signature generated outside ganache with method web3.eth.sign(signer, message)
      const signer = '0x2cc1166f6212628a0deef2b33befb2187d35b86c';
      const message = web3.sha3(TEST_MESSAGE);
      // eslint-disable-next-line max-len
      const signature = '0x5d99b6f7f6d1f73d1a26497f2b1c89b24c0993913f86e9a2d02cd69887d9c94f3c880358579d811b21dd1b7fd9bb01c1d81d10e69f0384e675c32b39643be89200';
      (await ecrecovery.recover(message, signature)).should.eq(signer);
    });
  
    it('recover v1', async function () {
      // Signature generated outside ganache with method web3.eth.sign(signer, message)
      const signer = '0x1e318623ab09fe6de3c9b8672098464aeda9100e';
      const message = web3.sha3(TEST_MESSAGE);
      // eslint-disable-next-line max-len
      const signature = '0x331fe75a821c982f9127538858900d87d3ec1f9f737338ad67cad133fa48feff48e6fa0c18abc62e42820f05943e47af3e9fbe306ce74d64094bdf1691ee53e001';
      (await ecrecovery.recover(message, signature)).should.eq(signer);
    });
  
    it('recover using web3.eth.sign()', async function () {
      // Create the signature using account[0]
      const signature = signMessage(anyone, web3.sha3(TEST_MESSAGE));
  
      // Recover the signer address from the generated message and signature.
      (await ecrecovery.recover(
        hashMessage(TEST_MESSAGE),
        signature
      )).should.eq(anyone);
    });
  
    it('recover using web3.eth.sign() should return wrong signer', async function () {
      // Create the signature using account[0]
      const signature = signMessage(anyone, web3.sha3(TEST_MESSAGE));
  
      // Recover the signer address from the generated message and wrong signature.
      (await ecrecovery.recover(hashMessage('Nope'), signature)).should.not.eq(anyone);
    });
  
    it('recover should revert when a small hash is sent', async function () {
      // Create the signature using account[0]
      const signature = signMessage(anyone, TEST_MESSAGE);
      try {
        await expectThrow(
          ecrecovery.recover(hashMessage(TEST_MESSAGE).substring(2), signature)
        );
      } catch (error) {
        // @TODO(shrugs) - remove this once we upgrade to solc^0.5
      }
    });
  
    context('toEthSignedMessage', () => {
      it('should prefix hashes correctly', async function () {
        const hashedMessage = web3.sha3(TEST_MESSAGE);
        (await ecrecovery.toEthSignedMessageHash(hashedMessage)).should.eq(hashMessage(TEST_MESSAGE));
      });
    });
  });
  