set up env for test & add basic unit test example

.eslintrc.js

@@ -4,7 +4,7 @@ module.exports = {
       browser: true,
       es6: true,
       node: true,
-      jest: true,
+      mocha: true,
     },
     globals: {
       BigInt: true,
@@ -161,14 +161,25 @@ module.exports = {
       },
       {
         files: ["**/test/**/*.test.ts"],
-        plugins: ["jest"],
+        plugins: ["mocha", "chai-expect"],
+        extends: ["plugin:mocha/recommended", "plugin:chai-expect/recommended"],
         rules: {
-            "jest/no-disabled-tests": "warn",
-            "jest/no-focused-tests": "error",
-            "jest/no-identical-title": "error",
-            "jest/prefer-to-have-length": "warn",
-            "jest/valid-expect": "error"
-          }
+          // We observed that having multiple top level "describe" save valuable indentation
+          // https://github.com/lo1tuma/eslint-plugin-mocha/blob/master/docs/rules/max-top-level-suites.md
+          "mocha/max-top-level-suites": "off",
+          // We need to disable because we disabled "mocha/no-setup-in-describe" rule
+          // TODO: Move all setup code to before/beforeEach and then disable async describe
+          // https://github.com/lo1tuma/eslint-plugin-mocha/blob/master/docs/rules/no-async-describe.md
+          "mocha/no-async-describe": "off",
+          // Use of arrow functions are very common
+          "mocha/no-mocha-arrows": "off",
+          // It's common to call function inside describe block
+          // https://github.com/lo1tuma/eslint-plugin-mocha/blob/master/docs/rules/no-setup-in-describe.md
+          "mocha/no-setup-in-describe": "off",
+          // We use to split before in small isolated tasks
+          // https://github.com/lo1tuma/eslint-plugin-mocha/blob/master/docs/rules/no-sibling-hooks.md
+          "mocha/no-sibling-hooks": "off",
+        },
       },
       {
         files: ["**/types/**/*.ts"],

.mocharc.yaml

@@ -0,0 +1,4 @@
+extension: ["ts"]
+colors: true
+node-option:
+  - "loader=ts-node/esm"

package.json

@@ -12,6 +12,7 @@
     "build": "yarn workspace types run build && yarn workspace db run build & lerna run build",
     "lint": "eslint --color --ext .ts packages/*/src/",
     "fix-lint": "eslint --ext .ts --fix packages/*/src/",
+    "test": "lerna run test --concurrency 1",
     "test:unit": "lerna run test:unit --no-bail --concurrency 1",
     "check-readme": "lerna run check-readme",
     "release:publish": "lerna publish from-package --yes --no-verify-access",
@@ -22,23 +23,33 @@
     "lru-cache": "^6.0.0"
   },
   "devDependencies": {
+    "@types/chai": "4.3.6",
+    "@types/chai-as-promised": "7.1.6",
+    "@types/mocha": "10.0.1",
+    "@types/sinon": "10.0.16",
+    "@types/sinon-chai": "3.2.9",
     "@types/abstract-leveldown": "7.2.1",
     "@types/compression": "1.7.2",
-    "@types/jest": "29.2.3",
     "@types/node": "18.11.9",
     "@typescript-eslint/eslint-plugin": "5.43.0",
     "@typescript-eslint/parser": "5.43.0",
     "eslint": "8.27.0",
     "eslint-config-airbnb-base": "15.0.0",
     "eslint-plugin-import": "2.26.0",
     "eslint-plugin-prettier": "4.2.1",
-    "jest": "29.3.1",
-    "jest-express": "1.12.0",
+    "eslint-plugin-mocha": "10.2.0",
     "lerna": "6.4.1",
-    "ts-jest": "29.0.3",
     "ts-node": "10.9.1",
     "tsconfig-paths": "4.1.2",
-    "typescript": "4.8.4"
+    "typescript": "4.8.4",
+    "chai": "4.3.8",
+    "chai-as-promised": "7.1.1",
+    "sinon": "16.0.0",
+    "sinon-chai": "3.7.0",
+    "mocha": "10.2.0",
+    "vitest": "0.34.6",
+    "vitest-when": "0.2.0",
+    "@vitest/coverage-v8": "0.34.6"
   },
   "license": "MIT",
   "workspaces": [

packages/api/package.json

@@ -25,9 +25,6 @@
     "build": "tsc -p tsconfig.build.json",
     "lint": "eslint --color --ext .ts src/ test/",
     "lint:fix": "yarn run lint --fix",
-    "pretest": "yarn run check-types",
-    "test": "yarn test:unit",
-    "test:unit": "mocha 'test/unit/**/*.test.ts'",
     "check-readme": "typescript-docs-verifier"
   },
   "dependencies": {

packages/cli/package.json

@@ -22,9 +22,6 @@
     "build": "tsc -p tsconfig.build.json",
     "lint": "eslint --color --ext .ts src/ test/",
     "lint:fix": "yarn run lint --fix",
-    "pretest": "yarn run check-types",
-    "test": "yarn test:unit",
-    "test:unit": "mocha 'test/unit/**/*.test.ts'",
     "check-readme": "typescript-docs-verifier"
   },
   "bugs": {

packages/db/package.json

@@ -25,9 +25,6 @@
     "build": "tsc -p tsconfig.build.json",
     "lint": "eslint --color --ext .ts src/ test/",
     "lint:fix": "yarn run lint --fix",
-    "pretest": "yarn run check-types",
-    "test": "yarn test:unit",
-    "test:unit": "mocha 'test/unit/**/*.test.ts'",
     "check-readme": "typescript-docs-verifier"
   },
   "dependencies": {

packages/executor/.mocharc.yml

@@ -0,0 +1,8 @@
+colors: true
+require:
+  - ./test/setup.ts
+timeout: 5000
+exit: true
+extension: ["ts"]
+node-option:
+  - "loader=ts-node/esm"

packages/executor/package.json

@@ -25,9 +25,8 @@
     "build": "tsc -p tsconfig.build.json",
     "lint": "eslint --color --ext .ts src/ test/",
     "lint:fix": "yarn run lint --fix",
-    "pretest": "yarn run check-types",
     "test": "yarn test:unit",
-    "test:unit": "mocha 'test/unit/**/*.test.ts'",
+    "test:unit": "vitest --run --dir test/unit/",
     "check-readme": "typescript-docs-verifier"
   },
   "dependencies": {

packages/executor/test/mocks/GethTracer.ts

@@ -0,0 +1,23 @@
+import { providers } from "ethers";
+import { BundlerCollectorReturn } from "types/lib/executor";
+import { TracerPrestateResponse } from "../../src/interfaces";
+
+export class GethTracer {
+  async debug_traceCall(
+    tx: providers.TransactionRequest
+  ): Promise<BundlerCollectorReturn> {
+    return {
+      callsFromEntryPoint: [],
+      keccak: [],
+      calls: [],
+      logs: [],
+      debug: [],
+    }
+  }
+
+  async debug_traceCallPrestate(
+    tx: providers.TransactionRequest
+  ): Promise<TracerPrestateResponse> {
+    return {};
+  }
+}