From 187e8f791477b24320c885319764b000f2f5c6fb Mon Sep 17 00:00:00 2001
From: Josema Sar <65446320+josemasar@users.noreply.github.com>
Date: Sun, 27 Feb 2022 00:44:09 +0100
Subject: [PATCH] Checking jest config web api (#4529)

* checking jest config web api

* changing from Error to console.error

* separate try catch

* function refactoring and line breaks

* path fixed

* const rwjsPaths not required

* Update packages/cli/src/commands/test.js

* Update packages/cli/src/commands/test.js

* mock config files

* mocking fs

* Update packages/cli/src/commands/__tests__/test.test.js

Co-authored-by: David Price <thedavid@thedavidprice.com>
---
 .../cli/src/commands/__tests__/test.test.js   |  9 +++++++
 packages/cli/src/commands/test.js             | 27 +++++++++++++++++++
 2 files changed, 36 insertions(+)

diff --git a/packages/cli/src/commands/__tests__/test.test.js b/packages/cli/src/commands/__tests__/test.test.js
index 3f11ba1617a5..d38f60d8a3d6 100644
--- a/packages/cli/src/commands/__tests__/test.test.js
+++ b/packages/cli/src/commands/__tests__/test.test.js
@@ -7,6 +7,7 @@ jest.mock('execa', () =>
     params,
   }))
 )
+
 import execa from 'execa'
 
 import { handler } from '../test'
@@ -19,6 +20,14 @@ jest.mock('@redwoodjs/structure', () => {
   }
 })
 
+// Before rw tests run, api/ and web/ `jest.config.js` is confirmed via existsSync()
+jest.mock('fs', () => {
+  return {
+    ...jest.requireActual('fs'),
+    existsSync: () => true,
+  }
+})
+
 afterEach(() => {
   jest.clearAllMocks()
 })
diff --git a/packages/cli/src/commands/test.js b/packages/cli/src/commands/test.js
index 61d595e76014..c46559383db8 100644
--- a/packages/cli/src/commands/test.js
+++ b/packages/cli/src/commands/test.js
@@ -1,3 +1,6 @@
+import fs from 'fs'
+import path from 'path'
+
 import execa from 'execa'
 import terminalLink from 'terminal-link'
 
@@ -27,6 +30,27 @@ function isInMercurialRepository() {
   }
 }
 
+function isJestConfigFile(sides) {
+  for (let side of sides) {
+    try {
+      if (sides.includes(side)) {
+        if (!fs.existsSync(path.join(side, 'jest.config.js'))) {
+          console.error(
+            c.error(
+              `\nError: Missing Jest config file ${side}/jest.config.js` +
+                '\nTo add this file, run `npx @redwoodjs/codemods update-jest-config`\n'
+            )
+          )
+          throw new Error(`Error: Jest config file not found in ${side} side`)
+        }
+      }
+    } catch (e) {
+      errorTelemetry(process.argv, e.message)
+      process.exit(e?.exitCode || 1)
+    }
+  }
+}
+
 export const command = 'test [filter..]'
 export const description = 'Run Jest tests. Defaults to watch mode'
 export const builder = (yargs) => {
@@ -134,6 +158,9 @@ export const handler = async ({
     jestArgs.push('--projects', ...sides)
   }
 
+  //checking if Jest config files exists in each of the sides
+  isJestConfigFile(sides)
+
   try {
     const cacheDirDb = `file:${ensurePosixPath(
       rwjsPaths.generated.base