Substreams Testing

This package provides a comprehensive testing suite for Substreams modules. The testing suite is designed to facilitate end-to-end testing, ensuring that your Substreams modules function as expected.

Overview

The testing suite builds the .spkg for your Substreams module, indexes a specified block range, and verifies that the expected state has been correctly indexed in PostgreSQL.

Prerequisites

Latest version of our indexer, Tycho. Please contact us to obtain the latest version. Once acquired, place it in the /testing/ directory.
Docker installed on your machine.

Test Configuration

Tests are defined in a yaml file. A template can be found at substreams/ethereum-template/test_assets.yaml. The configuration file should include:

The target Substreams config file.
The expected protocol types.
The tests to be run.

Each test will index all blocks between start-block and stop-block and verify that the indexed state matches the expected state.

You will also need the EVM Runtime file for the adapter contract. The script to generate this file is available under /evm/scripts/buildRuntime.sh. Please place this Runtime file under the respective substream directory inside the evm folder.

Running Tests

Step 1: Export Environment Variables

Export the required environment variables for the execution. You can find the available environment variables in the .env.default file. Please create a .env file in the testing directory and set the required environment variables.

The variable SUBSTREAMS_PATH should be a relative reference to the directory containing the Substreams module that you want to test.

Example: SUBSTREAMS_PATH=../substreams/ethereum-curve

Step 2: Build and the Testing Script

Run the testing script using Docker Compose:

docker compose run app

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