84 lines
3.3 KiB
TypeScript
84 lines
3.3 KiB
TypeScript
import { blockchainTests, expect, Numberish } from '@0x/contracts-test-utils';
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import { BigNumber, SafeMathRevertErrors } from '@0x/utils';
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import { artifacts, TestLibSafeDowncastContract } from '../../src/';
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blockchainTests('LibSafeDowncast', env => {
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let testContract: TestLibSafeDowncastContract;
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before(async () => {
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testContract = await TestLibSafeDowncastContract.deployFrom0xArtifactAsync(
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artifacts.TestLibSafeDowncast,
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env.provider,
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env.txDefaults,
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artifacts,
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);
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});
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const MAX_UINT_64 = new BigNumber(2).pow(64).minus(1);
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const MAX_UINT_96 = new BigNumber(2).pow(96).minus(1);
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const MAX_UINT_256 = new BigNumber(2).pow(256).minus(1);
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describe('downcastToUint96', () => {
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async function verifyCorrectDowncastAsync(n: Numberish): Promise<void> {
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const actual = await testContract.downcastToUint96.callAsync(new BigNumber(n));
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expect(actual).to.bignumber.eq(n);
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}
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function toDowncastError(n: Numberish): SafeMathRevertErrors.Uint256DowncastError {
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return new SafeMathRevertErrors.Uint256DowncastError(
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SafeMathRevertErrors.DowncastErrorCodes.ValueTooLargeToDowncastToUint96,
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new BigNumber(n),
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);
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}
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it('correctly downcasts 0', async () => {
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return verifyCorrectDowncastAsync(0);
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});
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it('correctly downcasts 1337', async () => {
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return verifyCorrectDowncastAsync(1337);
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});
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it('correctly downcasts MAX_UINT_96', async () => {
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return verifyCorrectDowncastAsync(MAX_UINT_96);
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});
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it('reverts on MAX_UINT_96 + 1', async () => {
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const n = MAX_UINT_96.plus(1);
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return expect(verifyCorrectDowncastAsync(n)).to.revertWith(toDowncastError(n));
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});
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it('reverts on MAX_UINT_256', async () => {
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const n = MAX_UINT_256;
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return expect(verifyCorrectDowncastAsync(n)).to.revertWith(toDowncastError(n));
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});
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});
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describe('downcastToUint64', () => {
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async function verifyCorrectDowncastAsync(n: Numberish): Promise<void> {
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const actual = await testContract.downcastToUint64.callAsync(new BigNumber(n));
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expect(actual).to.bignumber.eq(n);
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}
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function toDowncastError(n: Numberish): SafeMathRevertErrors.Uint256DowncastError {
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return new SafeMathRevertErrors.Uint256DowncastError(
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SafeMathRevertErrors.DowncastErrorCodes.ValueTooLargeToDowncastToUint64,
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new BigNumber(n),
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);
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}
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it('correctly downcasts 0', async () => {
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return verifyCorrectDowncastAsync(0);
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});
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it('correctly downcasts 1337', async () => {
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return verifyCorrectDowncastAsync(1337);
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});
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it('correctly downcasts MAX_UINT_64', async () => {
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return verifyCorrectDowncastAsync(MAX_UINT_64);
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});
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it('reverts on MAX_UINT_64 + 1', async () => {
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const n = MAX_UINT_64.plus(1);
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return expect(verifyCorrectDowncastAsync(n)).to.revertWith(toDowncastError(n));
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});
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it('reverts on MAX_UINT_256', async () => {
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const n = MAX_UINT_256;
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return expect(verifyCorrectDowncastAsync(n)).to.revertWith(toDowncastError(n));
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});
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});
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});
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