From e9515ca454a9d544d1f48eacc1bdc25e6da490b1 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Rog=C3=A9rio=20Rodrigues=20de=20Alc=C3=A2ntara?=
 <rogerio.alcantara@gmail.com>
Date: Sun, 2 Jun 2024 23:21:48 -0300
Subject: [PATCH] chore(tests): Convert jest config to js
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Which seems to speed up the tests execution.

hyperfine --warmup 5 --prepare "nx reset && nx clear-cache" \
                    --runs 100 "nx run-many -t lint"
  Time (mean ± σ):    1.417s ±  0.053s  [User: 0.887s, System: 0.113s]
  Range (min … max):  1.368s …  1.775s  100 runs

hyperfine --warmup 5 --prepare "nx reset && nx clear-cache" \
                    --runs 100 "nx run-many -t build"
  Time (mean ± σ):    2.110s ±  0.021s  [User: 2.571s, System: 0.216s]
  Range (min … max):  2.078s …  2.193s  100 runs

hyperfine --warmup 5 --prepare "nx reset && nx clear-cache" \
                    --runs 100 "nx run-many -t test"
  Time (mean ± σ):    1.493s ±  0.010s  [User: 0.787s, System: 0.134s]
  Range (min … max):  1.460s …  1.540s  100 runs
---
 apps/app/jest.config.js     | 25 +++++++++++++++++++++++++
 apps/app/jest.config.ts     | 11 -----------
 apps/app/tsconfig.app.json  |  2 +-
 apps/app/tsconfig.spec.json |  2 +-
 jest.config.js              |  7 +++++++
 jest.config.ts              |  5 -----
 6 files changed, 34 insertions(+), 18 deletions(-)
 create mode 100644 apps/app/jest.config.js
 delete mode 100644 apps/app/jest.config.ts
 create mode 100644 jest.config.js
 delete mode 100644 jest.config.ts

diff --git a/apps/app/jest.config.js b/apps/app/jest.config.js
new file mode 100644
index 0000000..83e5516
--- /dev/null
+++ b/apps/app/jest.config.js
@@ -0,0 +1,25 @@
+let jestConfigObject = {
+  displayName: 'app',
+  preset: '../../jest.preset.js',
+  testEnvironment: 'node',
+  transform: {
+    '^.+\\.[tj]s$': ['ts-jest', { tsconfig: '<rootDir>/tsconfig.spec.json' }]
+  },
+  moduleFileExtensions: ['ts', 'js', 'html'],
+  coverageDirectory: '../../coverage/apps/app'
+}
+
+if (process.env.NODE_ENV === 'CI' || process.env.CI === 'true') {
+  jestConfigObject.transform = {
+    '^.+\\.[tj]s$': [
+      'ts-jest',
+      {
+        tsconfig: '<rootDir>/tsconfig.spec.json',
+        isolatedModules: true,
+        diagnostics: false
+      }
+    ]
+  }
+}
+
+module.exports = jestConfigObject
diff --git a/apps/app/jest.config.ts b/apps/app/jest.config.ts
deleted file mode 100644
index 644717d..0000000
--- a/apps/app/jest.config.ts
+++ /dev/null
@@ -1,11 +0,0 @@
-/* eslint-disable */
-export default {
-  displayName: 'app',
-  preset: '../../jest.preset.js',
-  testEnvironment: 'node',
-  transform: {
-    '^.+\\.[tj]s$': ['ts-jest', { tsconfig: '<rootDir>/tsconfig.spec.json' }],
-  },
-  moduleFileExtensions: ['ts', 'js', 'html'],
-  coverageDirectory: '../../coverage/apps/app',
-};
diff --git a/apps/app/tsconfig.app.json b/apps/app/tsconfig.app.json
index a2ce765..2ebd6ce 100644
--- a/apps/app/tsconfig.app.json
+++ b/apps/app/tsconfig.app.json
@@ -7,6 +7,6 @@
     "emitDecoratorMetadata": true,
     "target": "es2021"
   },
-  "exclude": ["jest.config.ts", "src/**/*.spec.ts", "src/**/*.test.ts"],
+  "exclude": ["jest.config.js", "src/**/*.spec.ts", "src/**/*.test.ts"],
   "include": ["src/**/*.ts"]
 }
diff --git a/apps/app/tsconfig.spec.json b/apps/app/tsconfig.spec.json
index 9b2a121..c49cfea 100644
--- a/apps/app/tsconfig.spec.json
+++ b/apps/app/tsconfig.spec.json
@@ -6,7 +6,7 @@
     "types": ["jest", "node"]
   },
   "include": [
-    "jest.config.ts",
+    "jest.config.js",
     "src/**/*.test.ts",
     "src/**/*.spec.ts",
     "src/**/*.d.ts"
diff --git a/jest.config.js b/jest.config.js
new file mode 100644
index 0000000..cd9828a
--- /dev/null
+++ b/jest.config.js
@@ -0,0 +1,7 @@
+process.env.TZ = 'UTC'
+
+const { getJestProjectsAsync } = require('@nx/jest')
+
+module.exports = {
+  projects: await getJestProjectsAsync()
+}
diff --git a/jest.config.ts b/jest.config.ts
deleted file mode 100644
index 6b3f2d6..0000000
--- a/jest.config.ts
+++ /dev/null
@@ -1,5 +0,0 @@
-import { getJestProjectsAsync } from '@nx/jest';
-
-export default async () => ({
-  projects: await getJestProjectsAsync(),
-});