refactor(jest): switch to @swc/jest for faster transforms (#2620)

Remove ts-jest and configure @swc/jest for JavaScript/TypeScript transformations. This change improves the speed of transforming source files before running tests and supports modern React syntax with automatic runtime.

jest.config.ts

@@ -1,7 +1,6 @@
 import type { Config } from "@jest/types";
 
 const config: Config.InitialOptions = {
-  preset: "ts-jest",
   roots: ["./src", "./examples"],
   moduleNameMapper: {
     "@/test/(.*)": ["<rootDir>/test/$1"],
@@ -12,7 +11,25 @@ const config: Config.InitialOptions = {
   testEnvironment: "jsdom",
   coverageReporters: ["lcov", "text", "clover"],
   setupFilesAfterEnv: ["./test/setup.ts"],
-  fakeTimers: { enableGlobally: true }
+  fakeTimers: { enableGlobally: true },
+  /**
+   * Configuration for transforming source files before testing Uses @swc/jest
+   * to quickly transform JavaScript/TypeScript files
+   */
+  transform: {
+    "^.+\\.(t|j)sx?$": [
+      "@swc/jest",
+      {
+        jsc: {
+          transform: {
+            react: {
+              runtime: "automatic"
+            }
+          }
+        }
+      }
+    ]
+  }
 };
 
 export default config;

package.json

@@ -178,6 +178,8 @@
   },
   "devDependencies": {
     "@jest/types": "^29.6.3",
+    "@swc/core": "^1.10.1",
+    "@swc/jest": "^0.2.37",
     "@testing-library/dom": "^10.4.0",
     "@testing-library/jest-dom": "^6.6.3",
     "@testing-library/react": "^16.0.1",
@@ -208,7 +210,6 @@
     "prettier-plugin-jsdoc": "^1.3.0",
     "react": "^18.3.1",
     "react-dom": "^18.3.1",
-    "ts-jest": "^29.2.5",
     "ts-node": "^10.9.2",
     "tslib": "^2.8.1",
     "typescript": "~5.6.3",