前段

Change-Id: I718d4d07ea03c6d2b6bcbd4d426c5d1af2201bf4
diff --git a/jest.setup.js b/jest.setup.js
new file mode 100644
index 0000000..ba34172
--- /dev/null
+++ b/jest.setup.js
@@ -0,0 +1,6 @@
+import '@testing-library/jest-dom';

+// jest.setup.js

+import { TextEncoder, TextDecoder } from 'util';

+global.TextEncoder = TextEncoder;

+global.TextDecoder = TextDecoder;

+