49 lines
1.4 KiB
Markdown
49 lines
1.4 KiB
Markdown
# Contracts testing options
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## Revert stack traces
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If you want to see helpful stack traces (incl. line number, code snippet) for smart contract reverts, run the tests with:
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```
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yarn test:trace
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```
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**Note:** This currently slows down the test runs and is therefore not enabled by default.
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## Backing Ethereum node
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By default, our tests run against an in-process [Ganache](https://github.com/trufflesuite/ganache-core) instance. In order to run the tests against [Geth](https://github.com/ethereum/go-ethereum), first follow the instructions in the README for the devnet package to start the devnet Geth node. Then run:
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```bash
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TEST_PROVIDER=geth yarn test
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```
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## Code coverage
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In order to see the Solidity code coverage output generated by `@0x/sol-coverage`, run:
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```
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yarn test:coverage
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```
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## Gas profiler
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In order to profile the gas costs for a specific smart contract call/transaction, you can run the tests in `profiler` mode.
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**Note:** Traces emitted by ganache have incorrect gas costs so we recommend using Geth for profiling.
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```
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TEST_PROVIDER=geth yarn test:profiler
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```
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You'll see a warning that you need to explicitly enable and disable the profiler before and after the block of code you want to profile.
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```typescript
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import { profiler } from './utils/profiler';
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profiler.start();
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// Some call to a smart contract
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profiler.stop();
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```
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Without explicitly starting and stopping the profiler, the profiler output will be too busy, and therefore unusable.
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