Added tsconfig option to configuration

packages/jest/README.md

@@ -30,6 +30,7 @@ module.exports = {
 
       // configuration
       {
+        tsconfig: '<rootDir>/tsconfig-test.json',
         dynamicImport: true,
         react: {
           pragma: 'h',

packages/jest/index.ts

@@ -1,38 +1,46 @@
 import { xxh64 } from '@node-rs/xxhash'
 import type { Output } from '@swc/core'
+import type { TransformOptions } from '@jest/transform'
 import { Options, transformJest } from '@swc-node/core'
 import { readDefaultTsConfig, tsCompilerOptionsToSwcConfig } from '@swc-node/register/read-default-tsconfig'
 
-interface JestConfig26 {
-  transform: [match: string, transformerPath: string, options: Options][]
+interface TransformerConfig extends Options {
+  tsconfig?: string
 }
 
-interface JestConfig27 {
-  transformerConfig: Options
+interface JestConfig26 extends TransformOptions {
+  transform: [match: string, transformerPath: string, options: TransformerConfig][]
 }
 
-function getJestTransformConfig(jestConfig: JestConfig26 | JestConfig27): Options {
+type JestConfig27 = TransformOptions<TransformerConfig>
+
+function getJestTransformConfig(jestConfig: JestConfig26 | JestConfig27): TransformerConfig {
   if ('transformerConfig' in jestConfig) {
     // jest 27
-    return jestConfig.transformerConfig
+    return (jestConfig as JestConfig27).transformerConfig
   }
 
   if ('transform' in jestConfig) {
     // jest 26
-    return jestConfig.transform.find(([, transformerPath]) => transformerPath === __filename)?.[2] ?? {}
+    return (
+      (jestConfig as JestConfig26).transform.find(([, transformerPath]) => transformerPath === __filename)?.[2] ?? {}
+    )
   }
 
   return {}
 }
 
-const defaultTsConfig = readDefaultTsConfig()
-
 export = {
   process(src: string, path: string, jestConfig: JestConfig26 | JestConfig27): Output | string {
     if (/\.(tsx?|jsx?|mjs)$/.test(path)) {
+      const transformerConfig = getJestTransformConfig(jestConfig)
+      const tsconfig = transformerConfig.tsconfig
+        ? transformerConfig.tsconfig.replace('<rootDir>', jestConfig.config.rootDir)
+        : undefined
+      const tsConfigObject = readDefaultTsConfig(tsconfig)
       return transformJest(src, path, {
-        ...tsCompilerOptionsToSwcConfig(defaultTsConfig, path),
-        ...getJestTransformConfig(jestConfig),
+        ...tsCompilerOptionsToSwcConfig(tsConfigObject, path),
+        ...transformerConfig,
       })
     }
     return src

packages/jest/package.json

@@ -38,7 +38,8 @@
   },
   "devDependencies": {
     "@swc/core": "^1.6.6",
-    "@swc/types": "^0.1.9"
+    "@swc/types": "^0.1.9",
+    "@jest/transform": "^29.7.0"
   },
   "repository": {
     "type": "git",