protected files: string[] = []

constructor(protected project: TestProject) {}

constructor(protected project: TestProject) { }

public setFiles(files: string[]): void {

this.files = files

sourceErrors: TestError[]

time: number

}> {

// Detect if tsc output is help text instead of error output

// This happens when tsconfig.json is missing and tsc can't find any config

if (output.includes('The TypeScript Compiler - Version') || output.includes('COMMON COMMANDS')) {

const { typecheck } = this.project.config

const tsconfigPath = typecheck.tsconfig || 'tsconfig.json'

const msg = `TypeScript compiler returned help text instead of type checking results.\n`

+ `This usually means the tsconfig file was not found.\n\n`

+ `Possible solutions:\n`

+ ` 1. Ensure '${tsconfigPath}' exists in your project root\n`

+ ` 2. If using a custom tsconfig, verify the path in your Vitest config:\n`

+ ` test: { typecheck: { tsconfig: 'path/to/tsconfig.json' } }\n`

+ ` 3. Check that the tsconfig file is valid JSON`

throw new Error(msg)

}

const typeErrors = await this.parseTscLikeOutput(output)

const testFiles = new Set(this.getFiles())

return

}

let resolved = false

child.process.stdout.on('data', (chunk) => {

dataReceived = true

this._output += chunk

}

})

// Also capture stderr for configuration errors like missing tsconfig

child.process.stderr?.on('data', (chunk) => {

this._output += chunk

})

const timeout = setTimeout(

() => reject(new Error(`${typecheck.checker} spawn timed out`)),

this.project.config.typecheck.spawnTimeout,

)

let winTimeout: NodeJS.Timeout | undefined

function onError(cause: Error) {

if (resolved) {

return

}

clearTimeout(timeout)

clearTimeout(winTimeout)

resolved = true

reject(new Error('Spawning typechecker failed - is typescript installed?', { cause }))

}

// on Windows, the process might be spawned but fail to start

// we wait for a potential error here. if "close" event didn't trigger,

// we resolve the promise

setTimeout(() => {

winTimeout = setTimeout(() => {

resolved = true

resolve({ result: child })

}, 200)

}

else {

resolved = true

resolve({ result: child })

}

})