test(config-helper): some test case

package.json

@@ -40,6 +40,7 @@
     "@changesets/cli": "^2.19.0",
     "@commitlint/cli": "^12.1.4",
     "@commitlint/config-conventional": "^12.1.4",
+    "@jest/globals": "^27.5.1",
     "@ombro/logger": "^1.5.2",
     "@ombro/ts-config": "^1.3.0",
     "@swc/core": "^1.2.145",

packages/config-helper/src/__tests__/index.spec.ts

@@ -0,0 +1,56 @@
+import os from 'node:os'
+import path from 'node:path'
+import fs from 'fs-extra'
+import { jest } from '@jest/globals'
+
+import { PackageManager } from '@vrn-deco/cli-shared'
+import { readConfig, updateConfig, writeConfig } from '../index.js'
+
+const TEST_HOME_PATH = path.join(os.homedir(), '.vrn-deco.test')
+
+afterAll(() => {
+  fs.pathExistsSync(TEST_HOME_PATH) && fs.removeSync(TEST_HOME_PATH)
+})
+
+describe('@vrn-deco/cli-config-helper -> index.ts', () => {
+  beforeAll(() => {
+    //
+  })
+
+  afterEach(() => {
+    jest.resetAllMocks()
+  })
+
+  afterAll(() => {
+    jest.restoreAllMocks()
+  })
+
+  test('can only be used after initalizing environment variables', () => {
+    expect(() => readConfig()).toThrow('be after environment variables initialization')
+  })
+
+  test('can read config', () => {
+    process.env.VRN_CLI_HOME_PATH = TEST_HOME_PATH
+    const config = readConfig()
+    expect(config).toBeDefined()
+    expect(config.npmRegistry).toMatch(/^http/)
+    expect(config.packageManager).toBe(PackageManager.NPM)
+    expect(config.checkUpdateEnabled).toBe(true)
+  })
+
+  test('can write config', () => {
+    process.env.VRN_CLI_HOME_PATH = TEST_HOME_PATH
+    const config = readConfig()
+    config.npmRegistry = 'https://registry.npm.cphayim.me'
+    config.packageManager = PackageManager.Yarn
+    config.checkUpdateEnabled = false
+    expect(() => writeConfig(config)).not.toThrow()
+    expect(readConfig()).toEqual(config)
+  })
+
+  test('can update config', () => {
+    process.env.VRN_CLI_HOME_PATH = TEST_HOME_PATH
+    expect(() => updateConfig({ packageManager: PackageManager.PNPM })).not.toThrow()
+    expect(readConfig().packageManager).toBe(PackageManager.PNPM)
+  })
+})