feat(diagnostics): add option to enable/disable first-TS-error-throws

docs/user/config/diagnostics.md

@@ -9,22 +9,23 @@ A diagnostic can be:
 - syntax errors in some of your TypeScript files (source or tests)
 - type/semantic errors, what TypeScript has actually been made for 😁
 
-If a diagnostic is not filtered out, it'll fail the compilatin within TSJest, and so will your related test.
+If a diagnostic is not filtered out, it'll fail the compilation within TSJest, and so will your related test.
 
 ### Disabling/enabling
 
-By default all diagnostic are enabled. This is the same as setting the `diagnostics` option to `true`. To disable all diagnostics, set `diagnostics` to `false` (you might experience slightly better performence as well, especially if you disabled Jest cache).
+By default all diagnostic are enabled. This is the same as setting the `diagnostics` option to `true`. To disable all diagnostics, set `diagnostics` to `false` (you might experience slightly better performance as well, especially if you disabled Jest cache).
 
 ### Advanced configuration
 
-The option's value can also accpet an object for more advanced configuration. Each config. key is optional:
+The option's value can also accept an object for more advanced configuration. Each config. key is optional:
 
-- **`pretty`**: Enables/disable colorful and pretty output of errors (default: _enabled_).
+- **`warnOnly`**: If specified and `true`, diagnostics will be reported but won't stop compilation (default: _disabled_).
 - **`ignoreCodes`**: List of TypeScript error codes to ignore. Complete list can be found [there](https://github.com/Microsoft/TypeScript/blob/master/src/compiler/diagnosticMessages.json). By default here are the ones ignored:
   - `6059`: _'rootDir' is expected to contain all source files._
-  - `18002`: _The 'files' list in config file is empty._ (it is strongly recommanded to include this one)
+  - `18002`: _The 'files' list in config file is empty._ (it is strongly recommended to include this one)
   - `18003`: _No inputs were found in config file._
 - **`pathRegex`**: If specified, diagnostics of source files which path does **not** match will be ignored.
+- **`pretty`**: Enables/disables colorful and pretty output of errors (default: _enabled_).
 
 ### Examples
 
@@ -77,7 +78,7 @@ module.exports = {
   globals: {
     'ts-jest': {
       diagnostics: {
-        pathRegex: /\.(spec|test).ts$/
+        pathRegex: /\.(spec|test)\.ts$/
       }
     }
   }
@@ -104,6 +105,46 @@ module.exports = {
 
 </div></div>
 
+##### Do not fail on first error
+
+While some diagnostics are stop-blockers for the compilation, most of them are not. If you want the compilation (and so your tests) to continue when encountering those, set the `warnOnly` to `true`:
+
+<div class="row"><div class="col-md-6" markdown="block">
+
+```js
+// jest.config.js
+module.exports = {
+  // [...]
+  globals: {
+    'ts-jest': {
+      diagnostics: {
+        warnOnly: true
+      }
+    }
+  }
+};
+```
+
+</div><div class="col-md-6" markdown="block">
+
+```js
+// OR package.json
+{
+  // [...]
+  "jest": {
+    "globals": {
+      "ts-jest": {
+        "diagnostics": {
+          "warnOnly": true
+        }
+      }
+    }
+  }
+}
+```
+
+</div></div>
+
 ##### Ignoring some error codes:
 
 All TypeScript error codes can be found [there](https://github.com/Microsoft/TypeScript/blob/master/src/compiler/diagnosticMessages.json). The `ignoreCodes` option accepts this values:

e2e/__tests__/__snapshots__/type-checking.test.ts.snap

@@ -9,7 +9,7 @@ exports[`With type checking should fail using template "default" 1`] = `
   FAIL ./main.spec.ts
     ● Test suite failed to run
   
-      Unable to compile TypeScript (add code(s) in \`[jest-config].globals.ts-jest.diagnostics.ignoreCodes\` to ignore):
+      Unable to compile TypeScript (customize using \`[jest-config].globals.ts-jest.diagnostics\` option):
       main.ts:2:3 - error TS2322: Type 'string' is not assignable to type 'number'.
   
       2   return input
@@ -32,7 +32,7 @@ exports[`With type checking should fail using template "with-babel-6" 1`] = `
   FAIL ./main.spec.ts
     ● Test suite failed to run
   
-      Unable to compile TypeScript (add code(s) in \`[jest-config].globals.ts-jest.diagnostics.ignoreCodes\` to ignore):
+      Unable to compile TypeScript (customize using \`[jest-config].globals.ts-jest.diagnostics\` option):
       main.ts:2:3 - error TS2322: Type 'string' is not assignable to type 'number'.
   
       2   return input
@@ -55,7 +55,7 @@ exports[`With type checking should fail using template "with-babel-7" 1`] = `
   FAIL ./main.spec.ts
     ● Test suite failed to run
   
-      Unable to compile TypeScript (add code(s) in \`[jest-config].globals.ts-jest.diagnostics.ignoreCodes\` to ignore):
+      Unable to compile TypeScript (customize using \`[jest-config].globals.ts-jest.diagnostics\` option):
       main.ts:2:3 - error TS2322: Type 'string' is not assignable to type 'number'.
   
       2   return input
@@ -78,7 +78,7 @@ exports[`With type checking should fail using template "with-jest-22" 1`] = `
   FAIL ./main.spec.ts
     ● Test suite failed to run
   
-      Unable to compile TypeScript (add code(s) in \`[jest-config].globals.ts-jest.diagnostics.ignoreCodes\` to ignore):
+      Unable to compile TypeScript (customize using \`[jest-config].globals.ts-jest.diagnostics\` option):
       main.ts:2:3 - error TS2322: Type 'string' is not assignable to type 'number'.
       
       2   return input
@@ -101,7 +101,7 @@ exports[`With type checking should fail using template "with-typescript-2-7" 1`]
   FAIL ./main.spec.ts
     ● Test suite failed to run
   
-      Unable to compile TypeScript (add code(s) in \`[jest-config].globals.ts-jest.diagnostics.ignoreCodes\` to ignore):
+      Unable to compile TypeScript (customize using \`[jest-config].globals.ts-jest.diagnostics\` option):
       main.ts:2:3 - error TS2322: Type 'string' is not assignable to type 'number'.
   
       2   return input

src/__helpers__/fakers.ts

@@ -61,7 +61,7 @@ export function tsJestConfig(options?: Partial<TsJestConfig>): TsJestConfig {
     babelConfig: undefined,
     tsConfig: undefined,
     stringifyContentPathRegex: undefined,
-    diagnostics: { ignoreCodes: [], pretty: false },
+    diagnostics: { ignoreCodes: [], pretty: false, throws: true },
     ...options,
   }
 }

src/compiler.spec.ts

@@ -47,7 +47,7 @@ const v: boolean = t
         'foo.ts',
       ),
     ).toThrowErrorMatchingInlineSnapshot(`
-"Unable to compile TypeScript (add code(s) in \`[jest-config].globals.ts-jest.diagnostics.ignoreCodes\` to ignore):
+"Unable to compile TypeScript (customize using \`[jest-config].globals.ts-jest.diagnostics\` option):
 foo.ts(3,7): error TS2322: Type 'number' is not assignable to type 'string'.
 foo.ts(4,7): error TS2322: Type 'string' is not assignable to type 'boolean'."
 `)

src/compiler.ts

@@ -100,11 +100,7 @@ export function createCompiler(configs: ConfigSet): TsCompiler {
       reportDiagnostics: configs.shouldReportDiagnostic(fileName),
     })
 
-    const diagnosticList = result.diagnostics ? configs.filterDiagnostics(result.diagnostics) : []
-
-    if (diagnosticList.length) {
-      throw configs.createTsError(diagnosticList)
-    }
+    if (result.diagnostics) configs.raiseDiagnostics(result.diagnostics, fileName, logger)
 
     return [result.outputText, result.sourceMapText as string]
   }
@@ -190,11 +186,8 @@ export function createCompiler(configs: ConfigSet): TsCompiler {
           .concat(service.getSyntacticDiagnostics(fileName))
           .concat(service.getSemanticDiagnostics(fileName))
 
-        const diagnosticList = configs.filterDiagnostics(diagnostics)
-
-        if (diagnosticList.length) {
-          throw configs.createTsError(diagnosticList)
-        }
+        // will raise or just warn diagnostics depending on config
+        configs.raiseDiagnostics(diagnostics, fileName, logger)
       }
 
       if (output.emitSkipped) {

src/config/__snapshots__/config-set.spec.ts.snap

@@ -29,6 +29,7 @@ Object {
       18003,
     ],
     "pretty": true,
+    "throws": true,
   },
   "isolatedModules": false,
   "stringifyContentPathRegex": undefined,

src/config/config-set.spec.ts

@@ -129,6 +129,7 @@ describe('tsJest', () => {
       const EXPECTED = {
         ignoreCodes: IGNORE_DIAGNOSTIC_CODES,
         pretty: true,
+        throws: true,
       }
       expect(get().diagnostics).toEqual(EXPECTED)
       expect(get({ diagnostics: true }).diagnostics).toEqual(EXPECTED)
@@ -139,6 +140,7 @@ describe('tsJest', () => {
         ignoreCodes: IGNORE_DIAGNOSTIC_CODES,
         pretty: true,
         pathRegex: MATCH_NOTHING.source,
+        throws: false,
       }
       expect(get({ diagnostics: false }).diagnostics).toEqual(EXPECTED)
     })
@@ -148,6 +150,7 @@ describe('tsJest', () => {
         ignoreCodes: [...IGNORE_DIAGNOSTIC_CODES, 10, 25],
         pretty: false,
         pathRegex: '\\.test\\.ts',
+        throws: true,
       }
       expect(
         get({
@@ -168,6 +171,14 @@ describe('tsJest', () => {
         }).diagnostics,
       ).toEqual(EXPECTED)
     })
+    it('should have correct throws value', () => {
+      const EXPECTED = {
+        ignoreCodes: IGNORE_DIAGNOSTIC_CODES,
+        pretty: true,
+      }
+      expect(get({ diagnostics: { warnOnly: true } }).diagnostics).toEqual({ ...EXPECTED, throws: false })
+      expect(get({ diagnostics: { warnOnly: false } }).diagnostics).toEqual({ ...EXPECTED, throws: true })
+    })
   }) // diagnostics
 
   describe('stringifyContentPathRegex', () => {

src/config/config-set.ts

@@ -8,7 +8,7 @@
  * version of the `jest.ProjectConfig`, and then later it calls `process()`
  * with the complete, object version of it.
  */
-import { Logger } from 'bs-logger'
+import { LogContexts, Logger } from 'bs-logger'
 import { existsSync, readFileSync } from 'fs'
 import json5 from 'json5'
 import { dirname, isAbsolute, join, resolve } from 'path'
@@ -123,7 +123,7 @@ export class ConfigSet {
     readonly parentOptions?: TsJestGlobalOptions,
     parentLogger?: Logger,
   ) {
-    this.logger = parentLogger ? parentLogger.child({ namespace: 'config' }) : logger
+    this.logger = parentLogger ? parentLogger.child({ [LogContexts.namespace]: 'config' }) : logger
   }
 
   @Memoize()
@@ -187,9 +187,10 @@ export class ConfigSet {
     const ignoreList: any[] = [IGNORE_DIAGNOSTIC_CODES, process.env.TS_JEST_IGNORE_DIAGNOSTICS]
 
     if (diagnosticsOpt === true || diagnosticsOpt == null) {
-      diagnostics = { ignoreCodes: [], pretty: true }
+      diagnostics = { ignoreCodes: [], pretty: true, throws: true }
     } else if (diagnosticsOpt === false) {
       diagnostics = {
+        throws: false,
         pretty: true,
         ignoreCodes: [],
         pathRegex: MATCH_NOTHING.source, // matches nothing
@@ -200,9 +201,10 @@ export class ConfigSet {
         pretty: diagnosticsOpt.pretty == null ? true : !!diagnosticsOpt.pretty,
         ignoreCodes: [],
         pathRegex: normalizeRegex(diagnosticsOpt.pathRegex),
+        throws: !diagnosticsOpt.warnOnly,
       }
     }
-    // now we clean and flaten the list
+    // now we clean and flatten the list
     diagnostics.ignoreCodes = toDiagnosticCodeList(ignoreList)
 
     // stringifyContentPathRegex option
@@ -250,21 +252,37 @@ export class ConfigSet {
     const {
       tsJest: { tsConfig },
     } = this
+    const configFilePath = tsConfig && tsConfig.kind === 'file' ? tsConfig.value : undefined
     const result = this.readTsConfig(
       tsConfig && tsConfig.kind === 'inline' ? tsConfig.value : undefined,
-      tsConfig && tsConfig.kind === 'file' ? tsConfig.value : undefined,
+      configFilePath,
       tsConfig == null,
     )
     // throw errors if any matching wanted diagnostics
-    const configDiagnosticList = this.filterDiagnostics(result.resolved.errors)
-    if (configDiagnosticList.length) {
-      throw this.createTsError(configDiagnosticList)
-    }
+    this.raiseDiagnostics(result.resolved.errors, configFilePath)
 
     this.logger.debug({ tsconfig: result }, 'normalized typescript config')
     return result
   }
 
+  @Memoize()
+  get raiseDiagnostics() {
+    const {
+      createTsError,
+      filterDiagnostics,
+      tsJest: {
+        diagnostics: { throws },
+      },
+    } = this
+    return (diagnostics: Diagnostic[], filePath?: string, logger: Logger = this.logger): void | never => {
+      const filteredDiagnostics = filterDiagnostics(diagnostics, filePath)
+      if (filteredDiagnostics.length === 0) return
+      const error = createTsError(filteredDiagnostics)
+      if (throws) throw error
+      logger.warn({ error }, error.message)
+    }
+  }
+
   @Memoize()
   get babel(): BabelConfig | undefined {
     const {
@@ -416,7 +434,7 @@ export class ConfigSet {
       logger.debug('file caching disabled')
       return
     }
-    const cacheSufix = sha1(
+    const cacheSuffix = sha1(
       stringify({
         version: this.compilerModule.version,
         compiler: this.tsJest.compiler,
@@ -425,7 +443,7 @@ export class ConfigSet {
         ignoreDiagnostics: this.tsJest.diagnostics.ignoreCodes,
       }),
     )
-    const res = join(this.jest.cacheDirectory, `ts-jest-${cacheSufix}`)
+    const res = join(this.jest.cacheDirectory, `ts-jest-${cacheSuffix}`)
     logger.debug({ cacheDirectory: res }, `will use file caching`)
     return res
   }

src/config/paths-to-module-name-mapper.spec.ts

@@ -61,7 +61,7 @@ Object {
 Array [
   "[level:40] Not mapping \\"no-target\\" because it has no target.
 ",
-  "[level:40] Mapping only to first target of \\"too-many-target\\" becuase it has more than one (2).
+  "[level:40] Mapping only to first target of \\"too-many-target\\" because it has more than one (2).
 ",
   "[level:40] Not mapping \\"too/*/many/*/stars\\" because it has more than one star (\`*\`).
 ",

src/types.ts

@@ -48,6 +48,7 @@ export interface TsJestGlobalOptions {
         pretty?: boolean
         ignoreCodes?: number | string | Array<number | string>
         pathRegex?: RegExp | string
+        warnOnly?: boolean
       }
 
   /**
@@ -81,6 +82,7 @@ interface TsJestConfig$diagnostics {
   pretty: boolean
   ignoreCodes: number[]
   pathRegex?: string | undefined
+  throws: boolean
 }
 interface TsJestConfig$babelConfig$file {
   kind: 'file'

src/util/__snapshots__/backports.spec.ts.snap

@@ -99,6 +99,7 @@ Object {
     "ts-jest": Object {
       "diagnostics": Object {
         "pathRegex": "\\\\.spec\\\\.ts$",
+        "warnOnly": true,
       },
     },
   },
@@ -157,7 +158,9 @@ exports[`backportJestConfig with "globals.ts-jest.enableTsDiagnostics" set to tr
 Object {
   "globals": Object {
     "ts-jest": Object {
-      "diagnostics": true,
+      "diagnostics": Object {
+        "warnOnly": true,
+      },
     },
   },
 }

src/util/backports.ts

@@ -59,8 +59,8 @@ export const backportJestConfig = <T extends jest.InitialOptions | jest.ProjectC
   if ('enableTsDiagnostics' in tsJest) {
     warnConfig('globals.ts-jest.enableTsDiagnostics', 'globals.ts-jest.diagnostics')
     if (tsJest.enableTsDiagnostics) {
-      mergeTsJest.diagnostics =
-        typeof tsJest.enableTsDiagnostics === 'string' ? { pathRegex: tsJest.enableTsDiagnostics } : true
+      mergeTsJest.diagnostics = { warnOnly: true }
+      if (typeof tsJest.enableTsDiagnostics === 'string') mergeTsJest.diagnostics.pathRegex = tsJest.enableTsDiagnostics
     } else {
       mergeTsJest.diagnostics = false
     }

src/util/messages.ts

@@ -10,12 +10,12 @@ export enum Errors {
   UnableToCompileTypeScript = 'Unable to compile TypeScript ({{help}}):\n{{diagnostics}}',
   NotMappingMultiStarPath = 'Not mapping "{{path}}" because it has more than one star (`*`).',
   NotMappingPathWithEmptyMap = 'Not mapping "{{path}}" because it has no target.',
-  MappingOnlyFirstTargetOfPath = 'Mapping only to first target of "{{path}}" becuase it has more than one ({{count}}).',
+  MappingOnlyFirstTargetOfPath = 'Mapping only to first target of "{{path}}" because it has more than one ({{count}}).',
 }
 
 export enum Helps {
   FixMissingModule = '{{label}}: `npm i -D {{module}}` (or `yarn add --dev {{module}}`)',
-  IgnoreDiagnosticCode = 'add code(s) in `[jest-config].globals.ts-jest.diagnostics.ignoreCodes` to ignore',
+  IgnoreDiagnosticCode = 'customize using `[jest-config].globals.ts-jest.diagnostics` option',
   MigrateConfigUsingCLI = 'Your Jest configuration is outdated. Use the CLI to help migrating it: ts-jest config:migrate <config-file>.',
 }