fix(legacy): throw type check error in ESM mode with reject

examples/ts-only/tsconfig.json

@@ -1,7 +1,7 @@
 {
   "compilerOptions": {
     "module": "CommonJS",
-    "target": "ES2015"
+    "target": "ES2021"
   },
   "files": ["globals.d.ts"]
 }

src/legacy/compiler/ts-compiler.spec.ts

@@ -5,8 +5,8 @@ import {
   type CompilerOptions,
   DiagnosticCategory,
   type EmitOutput,
-  type TranspileOutput,
   type transpileModule,
+  type TranspileOutput,
 } from 'typescript'
 
 import { createConfigSet, makeCompiler } from '../../__helpers__/fakers'
@@ -217,7 +217,7 @@ describe('TsCompiler', () => {
           emitSkipped: false,
         } as EmitOutput)
         // @ts-expect-error testing purpose
-        compiler._doTypeChecking = jest.fn()
+        compiler.getDiagnostics = jest.fn().mockReturnValue([])
 
         const output = compiler.getCompiledOutput(fileContent, fileName, {
           depGraphs: new Map(),
@@ -234,6 +234,7 @@ describe('TsCompiler', () => {
         }).toMatchSnapshot()
         expect(output).toEqual({
           code: updateOutput(jsOutput, fileName, sourceMap),
+          diagnostics: [],
         })
 
         // @ts-expect-error testing purpose
@@ -256,7 +257,7 @@ describe('TsCompiler', () => {
         // @ts-expect-error testing purpose
         compiler._logger.warn = jest.fn()
         // @ts-expect-error testing purpose
-        compiler._doTypeChecking = jest.fn()
+        compiler.getDiagnostics = jest.fn().mockReturnValue([])
         const fileToCheck = fileName.replace('.ts', '.js')
 
         const output = compiler.getCompiledOutput(fileContent, fileToCheck, {
@@ -286,7 +287,7 @@ describe('TsCompiler', () => {
           // @ts-expect-error testing purpose
           compiler._logger.warn = jest.fn()
           // @ts-expect-error testing purpose
-          compiler._doTypeChecking = jest.fn()
+          compiler.getDiagnostics = jest.fn().mockReturnValue([])
 
           // @ts-expect-error testing purpose
           expect(compiler._logger.warn).not.toHaveBeenCalled()
@@ -310,7 +311,7 @@ describe('TsCompiler', () => {
           emitSkipped: false,
         } as EmitOutput)
         // @ts-expect-error testing purpose
-        compiler._doTypeChecking = jest.fn()
+        compiler.getDiagnostics = jest.fn().mockReturnValue([])
 
         expect(() =>
           compiler.getCompiledOutput(fileContent, fileName, {
@@ -527,7 +528,7 @@ describe('TsCompiler', () => {
     )
   })
 
-  describe('_doTypeChecking', () => {
+  describe('getDiagnostics', () => {
     const fileName = join(mockFolder, 'thing.ts')
     const fileName1 = join(mockFolder, 'thing1.ts')
     const fileContent = 'const bar = 1'
@@ -596,10 +597,10 @@ describe('TsCompiler', () => {
       },
     )
 
-    test.each([true, false])(
+    test(
       'should/should not report diagnostics in watch mode when shouldReportDiagnostics is %p ' +
         'and processing file is used by other files',
-      (shouldReport) => {
+      () => {
         const compiler = makeCompiler({
           tsJestConfig: { ...baseTsJestConfig, useESM: false },
         })
@@ -627,11 +628,7 @@ describe('TsCompiler', () => {
           },
         ]
         compiler.configSet.raiseDiagnostics = jest.fn()
-        compiler.configSet.shouldReportDiagnostics = jest
-          .fn<(f: string) => boolean>()
-          .mockImplementation((fileToCheck) => {
-            return fileToCheck === fileName1 ? shouldReport : false
-          })
+        compiler.configSet.shouldReportDiagnostics = jest.fn<(f: string) => boolean>().mockReturnValue(false)
         // @ts-expect-error testing purpose
         compiler._languageService.getEmitOutput = jest.fn().mockReturnValueOnce({
           outputFiles: [{ text: sourceMap }, { text: jsOutput }],
@@ -654,24 +651,11 @@ describe('TsCompiler', () => {
           watchMode: true,
         })
 
-        if (shouldReport) {
-          // @ts-expect-error testing purpose
-          expect(compiler._languageService?.getSemanticDiagnostics).toHaveBeenCalledWith(fileName1)
-          // @ts-expect-error testing purpose
-          expect(compiler._languageService?.getSyntacticDiagnostics).toHaveBeenCalledWith(fileName1)
-          expect(compiler.configSet.raiseDiagnostics).toHaveBeenCalledWith(
-            diagnostics,
-            fileName,
-            // @ts-expect-error testing purpose
-            compiler._logger,
-          )
-        } else {
-          // @ts-expect-error testing purpose
-          expect(compiler._languageService?.getSemanticDiagnostics).not.toHaveBeenCalled()
-          // @ts-expect-error testing purpose
-          expect(compiler._languageService?.getSyntacticDiagnostics).not.toHaveBeenCalled()
-          expect(compiler.configSet.raiseDiagnostics).not.toHaveBeenCalled()
-        }
+        // @ts-expect-error testing purpose
+        expect(compiler._languageService?.getSemanticDiagnostics).not.toHaveBeenCalled()
+        // @ts-expect-error testing purpose
+        expect(compiler._languageService?.getSyntacticDiagnostics).not.toHaveBeenCalled()
+        expect(compiler.configSet.raiseDiagnostics).not.toHaveBeenCalled()
       },
     )
 

src/legacy/compiler/ts-compiler.ts

@@ -1,6 +1,5 @@
 import { basename, normalize } from 'path'
 
-import type { TransformedSource } from '@jest/transform'
 import { LogContexts, Logger, LogLevels } from 'bs-logger'
 import memoize from 'lodash.memoize'
 import type {
@@ -25,13 +24,13 @@ import type {
 
 import { LINE_FEED, TS_TSX_REGEX } from '../../constants'
 import type {
-  DepGraphInfo,
   StringMap,
   TsCompilerInstance,
   TsJestAstTransformer,
   TsJestCompileOptions,
   TTypeScript,
 } from '../../types'
+import { CompiledOutput } from '../../types'
 import { rootLogger } from '../../utils'
 import { Errors, interpolate } from '../../utils/messages'
 import type { ConfigSet } from '../config/config-set'
@@ -146,11 +145,12 @@ export class TsCompiler implements TsCompilerInstance {
     return importedModulePaths
   }
 
-  getCompiledOutput(fileContent: string, fileName: string, options: TsJestCompileOptions): TransformedSource {
+  getCompiledOutput(fileContent: string, fileName: string, options: TsJestCompileOptions): CompiledOutput {
     let moduleKind = this._initialCompilerOptions.module
     let esModuleInterop = this._initialCompilerOptions.esModuleInterop
     let allowSyntheticDefaultImports = this._initialCompilerOptions.allowSyntheticDefaultImports
     const currentModuleKind = this._compilerOptions.module
+    const isEsmMode = this.configSet.useESM && options.supportsStaticESM
     if (
       (this.configSet.babelJestTransformer || (!this.configSet.babelJestTransformer && options.supportsStaticESM)) &&
       this.configSet.useESM
@@ -179,7 +179,34 @@ export class TsCompiler implements TsCompilerInstance {
       // Must set memory cache before attempting to compile
       this._updateMemoryCache(fileContent, fileName, currentModuleKind === moduleKind)
       const output: EmitOutput = this._languageService.getEmitOutput(fileName)
-      this._doTypeChecking(fileName, options.depGraphs, options.watchMode)
+      const diagnostics = this.getDiagnostics(fileName)
+      if (!isEsmMode && diagnostics.length) {
+        this.configSet.raiseDiagnostics(diagnostics, fileName, this._logger)
+        if (options.watchMode) {
+          this._logger.debug({ fileName }, '_doTypeChecking(): starting watch mode computing diagnostics')
+
+          for (const entry of options.depGraphs.entries()) {
+            const normalizedModuleNames = entry[1].resolvedModuleNames.map((moduleName) => normalize(moduleName))
+            const fileToReTypeCheck = entry[0]
+            if (normalizedModuleNames.includes(fileName) && this.configSet.shouldReportDiagnostics(fileToReTypeCheck)) {
+              this._logger.debug(
+                { fileToReTypeCheck },
+                '_doTypeChecking(): computing diagnostics using language service',
+              )
+
+              this._updateMemoryCache(this._getFileContentFromCache(fileToReTypeCheck), fileToReTypeCheck)
+              const importedModulesDiagnostics = [
+                // eslint-disable-next-line @typescript-eslint/no-non-null-assertion
+                ...this._languageService!.getSemanticDiagnostics(fileToReTypeCheck),
+                // eslint-disable-next-line @typescript-eslint/no-non-null-assertion
+                ...this._languageService!.getSyntacticDiagnostics(fileToReTypeCheck),
+              ]
+              // will raise or just warn diagnostics depending on config
+              this.configSet.raiseDiagnostics(importedModulesDiagnostics, fileName, this._logger)
+            }
+          }
+        }
+      }
       if (output.emitSkipped) {
         if (TS_TSX_REGEX.test(fileName)) {
           throw new Error(interpolate(Errors.CannotProcessFile, { file: fileName }))
@@ -204,9 +231,11 @@ export class TsCompiler implements TsCompilerInstance {
       return this._compilerOptions.sourceMap
         ? {
             code: updateOutput(outputFiles[1].text, fileName, outputFiles[0].text),
+            diagnostics,
           }
         : {
             code: updateOutput(outputFiles[0].text, fileName),
+            diagnostics,
           }
     } else {
       this._logger.debug({ fileName }, 'getCompiledOutput(): compiling as isolated module')
@@ -425,40 +454,20 @@ export class TsCompiler implements TsCompilerInstance {
   /**
    * @internal
    */
-  private _doTypeChecking(fileName: string, depGraphs: Map<string, DepGraphInfo>, watchMode: boolean): void {
+  private getDiagnostics(fileName: string): Diagnostic[] {
+    const diagnostics: Diagnostic[] = []
     if (this.configSet.shouldReportDiagnostics(fileName)) {
       this._logger.debug({ fileName }, '_doTypeChecking(): computing diagnostics using language service')
 
       // Get the relevant diagnostics - this is 3x faster than `getPreEmitDiagnostics`.
-      const diagnostics: Diagnostic[] = [
+      diagnostics.push(
         // eslint-disable-next-line @typescript-eslint/no-non-null-assertion
         ...this._languageService!.getSemanticDiagnostics(fileName),
         // eslint-disable-next-line @typescript-eslint/no-non-null-assertion
         ...this._languageService!.getSyntacticDiagnostics(fileName),
-      ]
-      // will raise or just warn diagnostics depending on config
-      this.configSet.raiseDiagnostics(diagnostics, fileName, this._logger)
+      )
     }
-    if (watchMode) {
-      this._logger.debug({ fileName }, '_doTypeChecking(): starting watch mode computing diagnostics')
-
-      for (const entry of depGraphs.entries()) {
-        const normalizedModuleNames = entry[1].resolvedModuleNames.map((moduleName) => normalize(moduleName))
-        const fileToReTypeCheck = entry[0]
-        if (normalizedModuleNames.includes(fileName) && this.configSet.shouldReportDiagnostics(fileToReTypeCheck)) {
-          this._logger.debug({ fileToReTypeCheck }, '_doTypeChecking(): computing diagnostics using language service')
 
-          this._updateMemoryCache(this._getFileContentFromCache(fileToReTypeCheck), fileToReTypeCheck)
-          const importedModulesDiagnostics = [
-            // eslint-disable-next-line @typescript-eslint/no-non-null-assertion
-            ...this._languageService!.getSemanticDiagnostics(fileToReTypeCheck),
-            // eslint-disable-next-line @typescript-eslint/no-non-null-assertion
-            ...this._languageService!.getSyntacticDiagnostics(fileToReTypeCheck),
-          ]
-          // will raise or just warn diagnostics depending on config
-          this.configSet.raiseDiagnostics(importedModulesDiagnostics, fileName, this._logger)
-        }
-      }
-    }
+    return diagnostics
   }
 }

src/legacy/compiler/ts-jest-compiler.ts

@@ -1,6 +1,4 @@
-import type { TransformedSource } from '@jest/transform'
-
-import type { CompilerInstance, StringMap, TsJestCompileOptions } from '../../types'
+import type { CompilerInstance, CompiledOutput, StringMap, TsJestCompileOptions } from '../../types'
 import type { ConfigSet } from '../config/config-set'
 
 import { TsCompiler } from './ts-compiler'
@@ -17,7 +15,7 @@ export class TsJestCompiler implements CompilerInstance {
     return this._compilerInstance.getResolvedModules(fileContent, fileName, runtimeCacheFS)
   }
 
-  getCompiledOutput(fileContent: string, fileName: string, options: TsJestCompileOptions): TransformedSource {
+  getCompiledOutput(fileContent: string, fileName: string, options: TsJestCompileOptions): CompiledOutput {
     return this._compilerInstance.getCompiledOutput(fileContent, fileName, options)
   }
 }

src/legacy/config/config-set.ts

@@ -593,7 +593,7 @@ export class ConfigSet {
             return !ignoreCodes.includes(diagnostic.code)
           })
     if (!filteredDiagnostics.length) return
-    const error = this._createTsError(filteredDiagnostics)
+    const error = this.createTsError(filteredDiagnostics)
     // only throw if `warnOnly` and it is a warning or error
     const importantCategories = [DiagnosticCategory.Warning, DiagnosticCategory.Error]
     if (this._diagnostics.throws && filteredDiagnostics.some((d) => importantCategories.includes(d.category))) {
@@ -614,7 +614,7 @@ export class ConfigSet {
   /**
    * @internal
    */
-  private _createTsError(diagnostics: readonly ts.Diagnostic[]): TSError {
+  createTsError(diagnostics: readonly ts.Diagnostic[]): TSError {
     const formatDiagnostics = this._diagnostics.pretty
       ? this.compilerModule.formatDiagnosticsWithColorAndContext
       : this.compilerModule.formatDiagnostics

src/legacy/ts-jest-transformer.ts

@@ -5,7 +5,13 @@ import type { SyncTransformer, TransformedSource } from '@jest/transform'
 import type { Logger } from 'bs-logger'
 
 import { DECLARATION_TYPE_EXT, JS_JSX_REGEX, TS_TSX_REGEX } from '../constants'
-import type { CompilerInstance, DepGraphInfo, ProjectConfigTsJest, TransformOptionsTsJest } from '../types'
+import type {
+  CompiledOutput,
+  CompilerInstance,
+  DepGraphInfo,
+  ProjectConfigTsJest,
+  TransformOptionsTsJest,
+} from '../types'
 import { parse, stringify, JsonableValue, rootLogger } from '../utils'
 import { importer } from '../utils/importer'
 import { Errors, interpolate } from '../utils/messages'
@@ -141,7 +147,9 @@ export class TsJestTransformer implements SyncTransformer {
     const configs = this._configsFor(transformOptions)
     const shouldStringifyContent = configs.shouldStringifyContent(sourcePath)
     const babelJest = shouldStringifyContent ? undefined : configs.babelJestTransformer
-    let result = this.processWithTs(sourceText, sourcePath, transformOptions)
+    let result: TransformedSource = {
+      code: this.processWithTs(sourceText, sourcePath, transformOptions).code,
+    }
     if (babelJest) {
       this._logger.debug({ fileName: sourcePath }, 'calling babel-jest processor')
 
@@ -163,11 +171,18 @@ export class TsJestTransformer implements SyncTransformer {
   ): Promise<TransformedSource> {
     this._logger.debug({ fileName: sourcePath, transformOptions }, 'processing', sourcePath)
 
-    return new Promise(async (resolve) => {
+    return new Promise(async (resolve, reject) => {
       const configs = this._configsFor(transformOptions)
       const shouldStringifyContent = configs.shouldStringifyContent(sourcePath)
       const babelJest = shouldStringifyContent ? undefined : configs.babelJestTransformer
-      let result = this.processWithTs(sourceText, sourcePath, transformOptions)
+      let result: TransformedSource
+      const processWithTsResult = this.processWithTs(sourceText, sourcePath, transformOptions)
+      result = {
+        code: processWithTsResult.code,
+      }
+      if (processWithTsResult.diagnostics?.length) {
+        reject(configs.createTsError(processWithTsResult.diagnostics))
+      }
       if (babelJest) {
         this._logger.debug({ fileName: sourcePath }, 'calling babel-jest processor')
 
@@ -183,7 +198,11 @@ export class TsJestTransformer implements SyncTransformer {
     })
   }
 
-  private processWithTs(sourceText: string, sourcePath: string, transformOptions: TransformOptionsTsJest) {
+  private processWithTs(
+    sourceText: string,
+    sourcePath: string,
+    transformOptions: TransformOptionsTsJest,
+  ): CompiledOutput {
     let result: TransformedSource
     const configs = this._configsFor(transformOptions)
     const shouldStringifyContent = configs.shouldStringifyContent(sourcePath)
@@ -330,7 +349,7 @@ export class TsJestTransformer implements SyncTransformer {
     sourcePath: string,
     transformOptions: TransformOptionsTsJest,
   ): Promise<string> {
-    return new Promise((resolve) => resolve(this.getCacheKey(sourceText, sourcePath, transformOptions)))
+    return Promise.resolve(this.getCacheKey(sourceText, sourcePath, transformOptions))
   }
 
   /**

src/types.ts

@@ -228,9 +228,13 @@ export interface TsJestCompileOptions {
   supportsStaticESM: boolean
 }
 
+export interface CompiledOutput extends TransformedSource {
+  diagnostics?: _ts.Diagnostic[]
+}
+
 export interface CompilerInstance {
   getResolvedModules(fileContent: string, fileName: string, runtimeCacheFS: StringMap): string[]
-  getCompiledOutput(fileContent: string, fileName: string, options: TsJestCompileOptions): TransformedSource
+  getCompiledOutput(fileContent: string, fileName: string, options: TsJestCompileOptions): CompiledOutput
 }
 export interface TsCompilerInstance extends CompilerInstance {
   configSet: ConfigSet