New Jest to Vitest migration

.gitignore

@@ -8,4 +8,7 @@ out/
 bin/
 *.log
 .vscode/
-src/main/generated/
+src/main/generated/
+
+node_modules/
+*.tsbuildinfo

build.gradle.kts

@@ -1,6 +1,13 @@
+@file:Suppress("UnstableApiUsage")
+
+import com.github.gradle.node.NodeExtension
+import com.github.gradle.node.npm.task.NpmTask
+import org.gradle.kotlin.dsl.configure
+
 plugins {
     id("org.openrewrite.build.recipe-library") version "latest.release"
     id("org.openrewrite.build.moderne-source-available-license") version "latest.release"
+    id("com.github.node-gradle.node") version "latest.release"
 }
 
 group = "org.openrewrite.recipe"
@@ -108,3 +115,48 @@ tasks.test {
 tasks.withType<JavaCompile> {
     options.compilerArgs.add("-Arewrite.javaParserClasspathFrom=resources")
 }
+
+// Override the defaults because the JavaScript code is one directory down (recipes-testing/).
+extensions.configure<NodeExtension> {
+    workDir.set(projectDir.resolve("recipes-testing"))
+    npmWorkDir.set(projectDir.resolve("recipes-testing"))
+    nodeProjectDir.set(projectDir.resolve("recipes-testing"))
+}
+
+val npmInstall = tasks.named("npmInstall")
+
+val npmBuild = tasks.register<NpmTask>("npmBuild") {
+    inputs.files(npmInstall)
+        .withPathSensitivity(PathSensitivity.RELATIVE)
+    inputs.files(file("recipes-testing/package.json"))
+        .withPathSensitivity(PathSensitivity.RELATIVE)
+    inputs.files(fileTree("recipes-testing/src"))
+        .withPathSensitivity(PathSensitivity.RELATIVE)
+    outputs.dir(file("recipes-testing/dist/"))
+
+    args = listOf("run", "build")
+}
+
+val npmTest = tasks.register<NpmTask>("npmTest") {
+    inputs.files(npmInstall)
+        .withPathSensitivity(PathSensitivity.RELATIVE)
+    inputs.files(fileTree("recipes-testing") {
+        include("*.json")
+        include("jest.config.js")
+    }).withPathSensitivity(PathSensitivity.RELATIVE)
+    inputs.files(fileTree("recipes-testing/src"))
+        .withPathSensitivity(PathSensitivity.RELATIVE)
+    inputs.files(fileTree("recipes-testing/test"))
+        .withPathSensitivity(PathSensitivity.RELATIVE)
+    dependsOn(npmBuild)
+
+    args = listOf("run", "test")
+}
+
+tasks.named("check") {
+    dependsOn(npmTest)
+}
+
+tasks.named("build") {
+    dependsOn(npmBuild)
+}

recipes-testing/.gitignore

@@ -0,0 +1 @@
+dist/

recipes-testing/jest.config.js

@@ -0,0 +1,17 @@
+module.exports = {
+  preset: 'ts-jest',
+  testEnvironment: 'node',
+  testPathIgnorePatterns: ['/node_modules/', '/dist/'],
+  testTimeout: 30000,
+  moduleFileExtensions: ['ts', 'tsx', 'js', 'jsx', 'json', 'node'],
+  moduleNameMapper: {
+    '^@openrewrite/recipes-testing/(.*)$': '<rootDir>/dist/src/$1'
+  },
+  transform: {
+    '^.+\\.tsx?$': ['ts-jest', {
+      tsconfig: 'tsconfig.test.json',
+    }],
+  },
+  testMatch: ['**/__tests__/**/*.+(ts|tsx|js)', '**/?(*.)+(spec|test).+(ts|tsx|js)'],
+  collectCoverageFrom: ['src/**/*.{ts,tsx}', '!src/**/*.d.ts'],
+};