End-to-End Tests

Spins up and tests Tendermint networks in Docker Compose based on a testnet manifest. To run the CI testnet:

make docker
make runner
./build/runner -f networks/ci.toml

This creates and runs a testnet named ci under networks/ci/ (determined by the manifest filename).

Testnet Manifests

Testnets are specified as TOML manifests. For an example see networks/ci.toml, and for documentation see pkg/manifest.go.

Test Stages

The test runner has the following stages, which can also be executed explicitly by running ./build/runner -f <manifest> <stage>:

setup: generates configuration files.
start: starts Docker containers.
load: generates a transaction load against the testnet nodes.
perturb: runs any requested perturbations (e.g. node restarts or network disconnects).
wait: waits for a few blocks to be produced, and for all nodes to catch up to it.
test: runs test cases in tests/ against all nodes in a running testnet.
stop: stops Docker containers.
cleanup: removes configuration files and Docker containers/networks.
logs: outputs all node logs.

Tests

Test cases are written as normal Go tests in tests/. They use a testNode() helper which executes each test as a parallel subtest for each node in the network.

Running Manual Tests

To run tests manually, set the E2E_MANIFEST environment variable to the path of the testnet manifest (e.g. networks/ci.toml) and run them as normal, e.g.:

./build/runner -f networks/ci.toml start
E2E_MANIFEST=networks/ci.toml go test -v ./tests/...

Optionally, E2E_NODE specifies the name of a single testnet node to test.

These environment variables can also be specified in tests/e2e_test.go to run tests from an editor or IDE:

func init() {
	// This can be used to manually specify a testnet manifest and/or node to
	// run tests against. The testnet must have been started by the runner first.
	os.Setenv("E2E_MANIFEST", "networks/ci.toml")
	os.Setenv("E2E_NODE", "validator01")
}

Debugging Failures

If a command or test fails, the runner simply exits with an error message and non-zero status code. The testnet is left running with data in the testnet directory, and can be inspected with e.g. docker ps, docker logs, or ./build/runner -f <manifest> logs or tail. To shut down and remove the testnet, run ./build/runner -f <manifest> cleanup.

Enabling IPv6

Docker does not enable IPv6 by default. To do so, enter the following in daemon.json (or in the Docker for Mac UI under Preferences → Docker Engine):

{
  "ipv6": true,
  "fixed-cidr-v6": "2001:db8:1::/64"
}

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