1 files changed, 28 insertions, 0 deletions

diff --git a/config/jestEsbuildTransformer.js b/config/jestEsbuildTransformer.js
new file mode 100644
index 0000000..b6f2fc3
--- /dev/null
+++ b/config/jestEsbuildTransformer.js
@@ -0,0 +1,28 @@
+import { transform } from 'esbuild';
+
+import { node } from './buildConstants.js';
+
+/**
+ * @param {string} source
+ * @param {import('@jest/types').Config.Path} filePath
+ * @return {Promise<import('@jest/transform').TransformedSource>}
+ */
+async function processAsync(source, filePath) {
+  const { code, map } = await transform(source, {
+    loader: filePath.endsWith('tsx') ? 'tsx' : 'ts',
+    sourcefile: filePath,
+    format: 'esm',
+    target: node,
+    sourcemap: true,
+  });
+  return {
+    code,
+    map,
+  };
+}
+
+/** @type {import('@jest/transform').AsyncTransformer<void>} */
+export default {
+  canInstrument: false,
+  processAsync,
+};