Make the react-native entry point Jest compatible

* Remove the need to create a custom resolver in jest code testing realm * This ensures there are no breaking changes in current users tests
realm · Jul 28, 2023 · 7134e8f · 7134e8f
1 parent ec2d005
commit 7134e8f
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Showing 3 changed files with 17 additions and 33 deletions.
diff --git a/packages/realm-react/custom-resolver.cjs b/packages/realm-react/custom-resolver.cjs
diff --git a/packages/realm-react/jest.config.json b/packages/realm-react/jest.config.json
@@ -1,7 +1,6 @@
 {
   "verbose": true,
   "preset": "react-native",
-  "resolver": "./custom-resolver.cjs",
   "roots": [
     "<rootDir>/src"
   ],
@@ -13,4 +12,4 @@
   },
   "testRegex": "(/__tests__/.*.(test|spec)).(jsx?|tsx?|js?|ts?)$",
   "testTimeout": 30000
-}
+}
diff --git a/packages/realm/index.react-native.js b/packages/realm/index.react-native.js
@@ -19,4 +19,19 @@
 /* eslint-disable @typescript-eslint/no-var-requires -- We're exporting using CJS assignment */
 /* eslint-env commonjs */
 
-module.exports = require("./dist/bundle.react-native").Realm;
+// Detect if jest is running
+const isJest = process?.env?.JEST_WORKER_ID !== undefined;
+
+let entryPoint;
+
+if (isJest) {
+  // Define a require function that will load the node bundle
+  // otherwise, metro will preemptively load the node bundle
+  const nodeRequire = require;
+  // Jest is running, use the node bundle
+  entryPoint = nodeRequire("./dist/bundle.node");
+} else {
+  entryPoint = require("./dist/bundle.react-native");
+}
+
+module.exports = entryPoint.Realm;