1 files changed, 57 insertions, 0 deletions

diff --git a/config/jestEsbuildCjsTransformer.cjs b/config/jestEsbuildCjsTransformer.cjs
new file mode 100644
index 0000000..419d7b2
--- /dev/null
+++ b/config/jestEsbuildCjsTransformer.cjs
@@ -0,0 +1,57 @@
+const { readFileSync } = require('node:fs');
+const path = require('node:path');
+
+const { transformSync } = require('esbuild');
+
+const electronVendorsJson = readFileSync(
+  path.join(__dirname, '../.electron-vendors.cache.json'),
+  'utf8',
+);
+
+/** @type {{ node: number; }} */
+// eslint-disable-next-line @typescript-eslint/no-unsafe-assignment
+const { node: nodeVersion } = JSON.parse(electronVendorsJson);
+
+/**
+ * @param {string} source
+ * @param {string} filePath
+ * @return {import('@jest/transform').TransformedSource}
+ */
+function process(source, filePath) {
+  /** @type {import('esbuild').Loader} */
+  let loader;
+  if (filePath.endsWith('tsx')) {
+    loader = 'tsx';
+  } else if (filePath.endsWith('ts')) {
+    loader = 'ts';
+  } else {
+    loader = 'js';
+  }
+  const { code, map } = transformSync(source, {
+    loader,
+    sourcefile: filePath,
+    format: 'cjs',
+    target: `node${nodeVersion}`,
+    sourcemap: true,
+    define: {
+      __DEV__: JSON.stringify(false), // For mobx
+      'process.env.NODE_ENV': 'test',
+      'process.env.MODE': 'test',
+      'import.meta.env': JSON.stringify({
+        DEV: false,
+        MODE: 'test',
+        PROD: true,
+      }),
+    },
+  });
+  return {
+    code,
+    map,
+  };
+}
+
+/** @type {import('@jest/transform').Transformer<void>} */
+module.exports = {
+  canInstrument: false,
+  process,
+};