Creates test request helper for API endpoints

Separates common utils into the medusa-core-utils package.
Sets up a testing environment where mocked models/services/etc. can be placed in
__mocks__ folder within its corresponding directory. The mocks will
automatically be registered in a awilix container only used for testing.

packages/medusa-core-utils/.babelrc

@@ -0,0 +1,9 @@
+{
+  "plugins": ["@babel/plugin-proposal-class-properties"],
+  "presets": ["@babel/preset-env"],
+  "env": {
+    "test": {
+      "plugins": ["@babel/plugin-transform-runtime"]
+    }
+  }
+}

packages/medusa-core-utils/.gitignore

@@ -0,0 +1 @@
+dist/

packages/medusa-core-utils/package.json

@@ -0,0 +1,31 @@
+{
+  "name": "medusa-core-utils",
+  "version": "1.0.0",
+  "description": "Core utils for Medusa",
+  "main": "dist/index.js",
+  "repository": {
+    "type": "git",
+    "url": "https://github.com/srindom/medusa",
+    "directory": "packages/medusa-core-utils"
+  },
+  "scripts": {
+    "build": "babel src --out-dir dist/ --ignore **/__tests__",
+    "prepare": "cross-env NODE_ENV=production npm run build",
+    "watch": "babel -w src --out-dir dist/ --ignore **/__tests__"
+  },
+  "author": "Sebastian Rindom",
+  "license": "AGPL-3.0-or-later",
+  "devDependencies": {
+    "@babel/cli": "^7.7.5",
+    "@babel/core": "^7.7.5",
+    "@babel/plugin-proposal-class-properties": "^7.7.4",
+    "@babel/plugin-transform-runtime": "^7.7.6",
+    "@babel/preset-env": "^7.7.5",
+    "client-sessions": "^0.8.0",
+    "cross-env": "^5.2.1"
+  },
+  "dependencies": {
+    "@hapi/joi": "^16.1.8",
+    "joi-objectid": "^3.0.1"
+  }
+}

packages/medusa-core-utils/src/errors.js

@@ -0,0 +1,38 @@
+/**
+ * @typedef MedusaErrorType
+ *
+ */
+export const MedusaErrorTypes = {
+  /** Errors stemming from the database */
+  DB_ERROR: "database_error",
+  INVALID_ARGUMENT: "invalid_argument",
+  INVALID_DATA: "invalid_data",
+  NOT_FOUND: "not_found"
+}
+
+/**
+ * Standardized error to be used across Medusa project.
+ * @extends Error
+ */
+class MedusaError extends Error {
+  /**
+   * Creates a standardized error to be used across Medusa project.
+   * @param type {MedusaErrorType} - the type of error.
+   * @param params {Array} - Error params.
+   */
+  constructor(name, message, ...params) {
+    super(...params)
+
+    if (Error.captureStackTrace) {
+      Error.captureStackTrace(this, MedusaError)
+    }
+
+    this.name = name
+    this.message = message
+    this.date = new Date()
+  }
+}
+
+MedusaError.Types = MedusaErrorTypes
+
+export default MedusaError

packages/medusa-core-utils/src/index.js

@@ -0,0 +1,2 @@
+export { default as Validator } from "./validator"
+export { default as MedusaError } from "./errors"

packages/medusa-core-utils/src/validator.js

@@ -0,0 +1,5 @@
+import Joi from "@hapi/joi"
+
+Joi.objectId = require("joi-objectid")(Joi)
+
+export default Joi