Developing with tmpnet

The load/ and warp/ paths contain end-to-end (e2e) tests that use the tmpnet fixture. By default both test suites use the tmpnet fixture to create a temporary network that exists for only the duration of their execution.

It is possible to create a temporary network that can be reused across test runs to minimize the setup cost involved:

# From the root of a clone of avalanchego, build the tmpnetctl cli
$ ./scripts/build_tmpnetctl.sh

# Start a new temporary network configured with subnet-evm's default plugin path
$ ./build/tmpnetctl start-network \
  --avalanche-path=./build/avalanchego
  --plugin-dir=$GOPATH/src/github.com/ava-labs/avalanchego/build/plugins

# From the root of a clone of subnet-evm, execute the warp test suite against the existing network
$ ginkgo -vv ./tests/warp -- --use-existing-network --network-dir=$HOME/.tmpnet/networks/latest

# To stop the temporary network when no longer needed, execute the following from the root of the clone of avalanchego
$ ./build/tmpnetctl stop-network --network-dir=$HOME/.tmpnet/networks/latest

The network started by tmpnetctl won't come with subnets configured, so the test suite will add them to the network the first time it runs. Subsequent test runs will be able to reuse those subnets without having to set them up.