readme update with testing

README.md

@@ -37,3 +37,31 @@ The relayer consists of the following components:
 <div align="center">
   <img src="resources/relayer-diagram.png?raw=true">
 </div>
+
+## Testing
+
+---
+
+### Unit tests
+
+Unit tests can be ran locally by running the command in root of the project:
+
+```
+go test ./...
+```
+
+### E2E tests
+
+E2E tests are ran as part of CI, but can also be ran locally. To run the E2E tests locally, you need to have the `avalanchego` build path and vm binary set up. For example with [subnet-evm](https://github.com/ava-labs/subnet-evm):
+
+```
+cd <SUBNET_EVM_PATH>
+BASEDIR=/tmp/e2e-test AVALANCHEGO_BUILD_PATH=/tmp/e2e-test/avalanchego ./scripts/install_avalanchego_release.sh
+./scripts/build.sh /tmp/e2e-test/avalanchego/plugins/srEXiWaHuhNyGwPUi444Tu47ZEDwxTWrbQiuD7FmgSAQ6X7Dy
+```
+
+Then, in the root of the `awm-relayer` project, run:
+
+```
+AVALANCHEGO_BUILD_PATH=/tmp/e2e-test/avalanchego DATA_DIR=/tmp/e2e-test/data ./scripts/e2e_test.sh
+```