Typescript Program is undefined when ts-jest isolatedModule is true

[edeesis]

Is there an existing issue for this?

• I have searched the existing issues

Current behavior

ts-jest has a isolatedModules option, which, when set to true, makes the program undefined, from this PR.

This causes the ModelClassVisitor and ControllerClassVisitor to immediately fail to retrieve the type checker.

 ● Test suite failed to run

    TypeError: Cannot read properties of undefined (reading 'getTypeChecker')

 at ModelClassVisitor.visit (node_modules/@nestjs/swagger/dist/plugin/visitors/model-class.visitor.js:35:37)
      at node_modules/@nestjs/swagger/dist/plugin/compiler-plugin.js:15:42
      at transformSourceFileOrBundle (node_modules/typescript/lib/typescript.js:89058:51)
      at transformation (node_modules/typescript/lib/typescript.js:112184:16)
      at transformRoot (node_modules/typescript/lib/typescript.js:112207:73)
      at transformNodes (node_modules/typescript/lib/typescript.js:112192:72)
      at emitJsFileOrBundle (node_modules/typescript/lib/typescript.js:112779:26)
      at emitSourceFileOrBundle (node_modules/typescript/lib/typescript.js:112714:7)
      at forEachEmittedFile (node_modules/typescript/lib/typescript.js:112468:26)
      at emitFiles (node_modules/typescript/lib/typescript.js:112688:5)
      at emitWorker (node_modules/typescript/lib/typescript.js:120187:26)
      at node_modules/typescript/lib/typescript.js:120172:53
      at runWithCancellationToken (node_modules/typescript/lib/typescript.js:120261:16)
      at Object.emit (node_modules/typescript/lib/typescript.js:120172:22)
      at Object.transpileModule (node_modules/typescript/lib/typescript.js:135707:13)
      at TsCompiler._transpileOutput (node_modules/ts-jest/dist/legacy/compiler/ts-compiler.js:211:25)
      at TsCompiler.getCompiledOutput (node_modules/ts-jest/dist/legacy/compiler/ts-compiler.js:201:31)
      at TsJestCompiler.getCompiledOutput (node_modules/ts-jest/dist/legacy/compiler/ts-jest-compiler.js:14:39)
      at TsJestTransformer.exports.TsJestTransformer.TsJestTransformer.processWithTs (node_modules/ts-jest/dist/legacy/ts-jest-transformer.js:259:37)
      at TsJestTransformer.exports.TsJestTransformer.TsJestTransformer.process (node_modules/ts-jest/dist/legacy/ts-jest-transformer.js:188:24)
      at ScriptTransformer.transformSource (node_modules/@jest/transform/build/ScriptTransformer.js:545:31)
      at ScriptTransformer._transformAndBuildScript (node_modules/@jest/transform/build/ScriptTransformer.js:674:40)
      at ScriptTransformer.transform (node_modules/@jest/transform/build/ScriptTransformer.js:726:19)
[... source code redacted]

Minimum reproduction code

https://github.com/edeesis/swagger-reproduce

Steps to reproduce

1. npm install
2. npm run test:e2e

Expected behavior

The compiler plugin should still work if isolatedModules is set to true, though I'm not sure how this would be done with how tightly coupled the compiler plugin is with the TS Program.

You may be able to instantiate a ts.Program object in the compiler plugin, not sure how that would work.

Package version

7.1.31

NestJS version

10.3.3

Node.js version

20.10.0

In which operating systems have you tested?

• macOS
• Windows
• Linux

Other

No response