feat: add --parallel flag yarn test cmd

packages/contracts/README.md

@@ -176,6 +176,8 @@ describe('Legacy Test Example', function () {
 
 # Performance optimizations
 
+Tests using `yarn test` will, by default run in parallel. See the [hardhat docs](https://hardhat.org/hardhat-runner/docs/guides/test-contracts#running-tests-in-parallel) for more information about parallelized testing. If you want to run the tests sequentially, use `yarn test:sequential`. Parallel tests may require increasing the timeout, you can set this in the `mocha` settings of the [hardhat config file](./hardhat.config.ts).
+
 For faster runs of your tests and scripts, consider skipping ts-node's type checking by setting the environment variable `TS_NODE_TRANSPILE_ONLY` to `1` in hardhat's environment. For more details see [the documentation](https://hardhat.org/guides/typescript.html#performance-optimizations).
 
 # Releases

packages/contracts/hardhat.config.ts

@@ -156,7 +156,7 @@ const config: HardhatUserConfig = {
     exclude: ['test'],
   },
   mocha: {
-    timeout: 60000, // 60 seconds // increase the timeout for subdomain validation tests
+    timeout: 90_000, // 90 seconds // increase the timeout for subdomain validation tests
   },
 };
 

packages/contracts/package.json

@@ -15,7 +15,8 @@
     "typechain:osx": "ts-node scripts/generate-typechain-osx.ts",
     "typechain:osx-versions": "ts-node scripts/generate-typechain-osx-versions.ts",
     "typechain": "yarn typechain:osx && yarn typechain:osx-versions",
-    "test": "hardhat test",
+    "test": "hardhat test --parallel",
+    "test:sequential": "hardhat test",
     "build": "hardhat compile && yarn typechain",
     "build:npm": "rollup --config rollup.config.ts",
     "coverage": "hardhat coverage --solcoverjs ./.solcover.js",