chore: cleaning

packages/json-web-signature/custom-jest-node-environment.js

@@ -0,0 +1,22 @@
+// From https://github.com/facebook/jest/issues/7780#issuecomment-615890410
+const NodeEnvironment = require("jest-environment-node");
+
+class MyEnvironment extends NodeEnvironment {
+  constructor(config) {
+    super(
+      Object.assign({}, config, {
+        globals: Object.assign({}, config.globals, {
+          Uint32Array: Uint32Array,
+          Uint8Array: Uint8Array,
+          ArrayBuffer: ArrayBuffer,
+        }),
+      })
+    );
+  }
+
+  async setup() {}
+
+  async teardown() {}
+}
+
+module.exports = MyEnvironment;

packages/json-web-signature/jest.config.js

@@ -1,7 +1,8 @@
 module.exports = {
   preset: 'ts-jest',
   testEnvironment: 'node',
-  moduleNameMapper: {
-    '^jose/(.*)$': '<rootDir>/node_modules/jose/dist/node/cjs/$1',
-  },
+  // We cannot use testEnvironment: 'node' because jest breaks Buffer / byte arrays necessary for crypto operations
+  // We cannot use testEnvironment: 'jsdom' because mongoose (see https://mongoosejs.com/docs/jest.html)
+  // Therefore we use a custom node environment without the broken Buffer classes
+  testEnvironment: './custom-jest-node-environment.js',
 };