chore: support more caller options in babel-jest

jestjs · Oct 31, 2020 · f70c799 · f70c799
1 parent 1a06c2c
commit f70c799
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Showing 6 changed files with 51 additions and 11 deletions.
diff --git a/CHANGELOG.md b/CHANGELOG.md
@@ -14,6 +14,7 @@
 - `[jest-config]` Throw correct error for missing preset modules ([#10737](https://github.com/facebook/jest/pull/10737))
 - `[jest-resolve-dependencies]` Resolve mocks as dependencies ([#10713](https://github.com/facebook/jest/pull/10713))
 - `[jest-runtime]` Handle file URLs in dynamic imports ([#10744](https://github.com/facebook/jest/pull/10744))
+- `[jest-runtime, babel-jest]` Pass more ESM options to `@jest/transform` ([#10752](https://github.com/facebook/jest/pull/10752))
 - `[jest-transform]` Link to ESM docs on syntax errors ([#10748](https://github.com/facebook/jest/pull/10748))
 
 ### Chore & Maintenance

diff --git a/e2e/__tests__/__snapshots__/transform.test.ts.snap b/e2e/__tests__/__snapshots__/transform.test.ts.snap
@@ -6,7 +6,7 @@ FAIL __tests__/ignoredFile.test.js
 
     babel-jest: Babel ignores __tests__/ignoredFile.test.js - make sure to include the file in Jest's transformIgnorePatterns as well.
 
-      at loadBabelConfig (../../../packages/babel-jest/build/index.js:180:13)
+      at loadBabelConfig (../../../packages/babel-jest/build/index.js:201:13)
 `;
 
 exports[`babel-jest instruments only specific files and collects coverage 1`] = `

diff --git a/packages/babel-jest/src/index.ts b/packages/babel-jest/src/index.ts
@@ -40,6 +40,14 @@ interface BabelJestTransformOptions extends TransformOptions {
   sourceMaps: 'both';
 }
 
+// https://github.com/DefinitelyTyped/DefinitelyTyped/pull/49267
+declare module '@babel/core' {
+  interface TransformCaller {
+    supportsExportNamespaceFrom?: boolean;
+    supportsTopLevelAwait?: boolean;
+  }
+}
+
 const createTransformer = (
   userOptions?: TransformOptions | null,
 ): BabelJestTransformer => {
@@ -49,7 +57,9 @@ const createTransformer = (
     caller: {
       name: 'babel-jest',
       supportsDynamicImport: false,
+      supportsExportNamespaceFrom: false,
       supportsStaticESM: false,
+      supportsTopLevelAwait: false,
       ...inputOptions.caller,
     },
     compact: false,
@@ -72,9 +82,15 @@ const createTransformer = (
         supportsDynamicImport:
           transformOptions?.supportsDynamicImport ??
           options.caller.supportsDynamicImport,
+        supportsExportNamespaceFrom:
+          transformOptions?.supportsExportNamespaceFrom ??
+          options.caller.supportsExportNamespaceFrom,
         supportsStaticESM:
           transformOptions?.supportsStaticESM ??
           options.caller.supportsStaticESM,
+        supportsTopLevelAwait:
+          transformOptions?.supportsTopLevelAwait ??
+          options.caller.supportsTopLevelAwait,
       },
       filename,
     });

diff --git a/packages/jest-runtime/src/index.ts b/packages/jest-runtime/src/index.ts
@@ -34,6 +34,7 @@ import {formatStackTrace, separateMessageFromStack} from 'jest-message-util';
 import {createDirectory, deepCyclicCopy} from 'jest-util';
 import {escapePathForRegex} from 'jest-regex-util';
 import {
+  CallerTransformOptions,
   ScriptTransformer,
   ShouldInstrumentOptions,
   TransformationOptions,
@@ -75,16 +76,16 @@ type HasteMapOptions = {
   watchman: boolean;
 };
 
-type InternalModuleOptions = {
+interface InternalModuleOptions extends Required<CallerTransformOptions> {
   isInternalModule: boolean;
-  supportsDynamicImport: boolean;
-  supportsStaticESM: boolean;
-};
+}
 
 const defaultTransformOptions: InternalModuleOptions = {
   isInternalModule: false,
   supportsDynamicImport: esmIsAvailable,
+  supportsExportNamespaceFrom: false,
   supportsStaticESM: false,
+  supportsTopLevelAwait: false,
 };
 
 type InitialModule = Omit<Module, 'require' | 'parent' | 'paths'>;
@@ -141,6 +142,19 @@ type RunScriptEvalResult = {[EVAL_RESULT_VARIABLE]: ModuleWrapper};
 
 const runtimeSupportsVmModules = typeof SyntheticModule === 'function';
 
+const supportsTopLevelAwait =
+  runtimeSupportsVmModules &&
+  (() => {
+    try {
+      // eslint-disable-next-line no-new
+      new SourceTextModule('await Promise.resolve()');
+
+      return true;
+    } catch {
+      return false;
+    }
+  })();
+
 class Runtime {
   private _cacheFS: StringMap;
   private _config: Config.ProjectConfig;
@@ -378,7 +392,9 @@ class Runtime {
       const transformedCode = this.transformFile(modulePath, {
         isInternalModule: false,
         supportsDynamicImport: true,
+        supportsExportNamespaceFrom: true,
         supportsStaticESM: true,
+        supportsTopLevelAwait,
       });
 
       const module = new SourceTextModule(transformedCode, {
@@ -608,7 +624,9 @@ class Runtime {
     return this.requireModule<T>(from, to, {
       isInternalModule: true,
       supportsDynamicImport: esmIsAvailable,
+      supportsExportNamespaceFrom: false,
       supportsStaticESM: false,
+      supportsTopLevelAwait: false,
     });
   }
 

diff --git a/packages/jest-transform/src/index.ts b/packages/jest-transform/src/index.ts
@@ -12,6 +12,7 @@ export {
 export {default as shouldInstrument} from './shouldInstrument';
 export type {
   CacheKeyOptions,
+  CallerTransformOptions,
   Transformer,
   ShouldInstrumentOptions,
   Options as TransformationOptions,

diff --git a/packages/jest-transform/src/types.ts b/packages/jest-transform/src/types.ts
@@ -23,9 +23,8 @@ export type Options = ShouldInstrumentOptions &
   Partial<{
     isCoreModule: boolean;
     isInternalModule: boolean;
-    supportsDynamicImport: boolean;
-    supportsStaticESM: boolean;
-  }>;
+  }> &
+  CallerTransformOptions;
 
 // This is fixed in source-map@0.7.x, but we can't upgrade yet since it's async
 interface FixedRawSourceMap extends Omit<RawSourceMap, 'version'> {
@@ -39,11 +38,16 @@ export type TransformedSource =
 
 export type TransformResult = TransformTypes.TransformResult;
 
-export interface TransformOptions {
-  instrument: boolean;
-  // names are copied from babel
+export interface CallerTransformOptions {
+  // names are copied from babel: https://babeljs.io/docs/en/options#caller
   supportsDynamicImport?: boolean;
+  supportsExportNamespaceFrom?: boolean;
   supportsStaticESM?: boolean;
+  supportsTopLevelAwait?: boolean;
+}
+
+export interface TransformOptions extends CallerTransformOptions {
+  instrument: boolean;
 }
 
 // TODO: For Jest 26 we should combine these into one options shape