From e6a114ab06c306ae9fb0094c8821eb309baf3f65 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Krist=C3=B3f=20Marussy?= <kristof@marussy.com>
Date: Fri, 31 Dec 2021 14:11:59 +0100
Subject: test: Switch to esbuild for faster tests

---
 config/jest.config.base.js     | 17 +++++++++--------
 config/jestEsbuildTransform.js | 26 ++++++++++++++++++++++++++
 package.json                   |  1 -
 yarn.lock                      |  1 -
 4 files changed, 35 insertions(+), 10 deletions(-)
 create mode 100644 config/jestEsbuildTransform.js

diff --git a/config/jest.config.base.js b/config/jest.config.base.js
index 87d5b31..bc34295 100644
--- a/config/jest.config.base.js
+++ b/config/jest.config.base.js
@@ -4,18 +4,19 @@ import { fileURLToDirname } from './utils.js';
 
 const thisDir = fileURLToDirname(import.meta.url);
 
-/** @type {import('ts-jest').InitialOptionsTsJest} */
+/** @type {import('@jest/types').Config.InitialOptions} */
 export default {
-  preset: 'ts-jest/presets/default-esm',
-  globals: {
-    'ts-jest': {
-      useESM: true,
-    },
+  transform: {
+    '\\.tsx?$': join(thisDir, 'jestEsbuildTransform.js'),
   },
+  extensionsToTreatAsEsm: [
+    '.ts',
+    '.tsx',
+  ],
   moduleNameMapper: {
     '@sophie/(.+)': join(thisDir, '../packages/$1/src/index.ts'),
-    '^(\\.{1,2}/.*)\\.js$': '$1',
-    // Workaround for typescript to recognize the vendored dependencies of chalk.
+    '^(\\.{1,2}/.*)\\.jsx?$': '$1',
+    // Workaround for jest to recognize the vendored dependencies of chalk.
     '#ansi-styles': join(thisDir, '../node_modules/chalk/source/vendor/ansi-styles/index.js'),
     '#supports-color': join(thisDir, '../node_modules/chalk/source/vendor/supports-color/index.js'),
   },
diff --git a/config/jestEsbuildTransform.js b/config/jestEsbuildTransform.js
new file mode 100644
index 0000000..7c6a57c
--- /dev/null
+++ b/config/jestEsbuildTransform.js
@@ -0,0 +1,26 @@
+import { transform } from 'esbuild';
+
+import { node } from './buildConstants.js';
+
+export default {
+  /**
+   * @param {string} source
+   * @param {string} filePath
+   * @param {import('@jest/types').Config.GlobalConfig} jestConfig
+   * @return {Promise<import('@jest/types').TransformTypes.TransformResult>}
+   */
+  async processAsync(source, filePath) {
+    const { code } = await transform(source, {
+      loader: filePath.endsWith('tsx') ? 'tsx' : 'ts',
+      sourcefile: filePath,
+      format: 'esm',
+      target: node,
+      sourcemap: 'inline',
+    });
+    return {
+      code,
+      originalCode: source,
+      sourceMapPath: null,
+    };
+  },
+};
diff --git a/package.json b/package.json
index ab2fc9f..f1ee627 100644
--- a/package.json
+++ b/package.json
@@ -49,7 +49,6 @@
     "jest": "^27.4.5",
     "rimraf": "^3.0.2",
     "rollup": "^2.62.0",
-    "ts-jest": "^27.1.2",
     "typescript": "^4.5.4",
     "vite": "^2.7.10"
   },
diff --git a/yarn.lock b/yarn.lock
index 9d19aac..41293cb 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -7015,7 +7015,6 @@ __metadata:
     preload: ^0.1.0
     rimraf: ^3.0.2
     rollup: ^2.62.0
-    ts-jest: ^27.1.2
     typescript: ^4.5.4
     vite: ^2.7.10
   languageName: unknown
-- 
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