From a646cad39ef72b0903c92404e414e342966e34f7 Mon Sep 17 00:00:00 2001
From: Ahn <anhpnnd@gmail.com>
Date: Wed, 1 Apr 2020 01:09:52 +0200
Subject: [PATCH 1/2] chore(jest-types): expose TransformedSource for
 transformers

---
 CHANGELOG.md                         | 2 ++
 packages/jest-transform/src/index.ts | 1 +
 packages/jest-transform/src/types.ts | 9 ++++-----
 3 files changed, 7 insertions(+), 5 deletions(-)

diff --git a/CHANGELOG.md b/CHANGELOG.md
index 112157a8e4d5..8ad45be90da4 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -6,6 +6,8 @@
 
 ### Chore & Maintenance
 
+- `[@jest/transform]` Expose type `TransformedSource`
+
 ### Performance
 
 ## 25.2.4
diff --git a/packages/jest-transform/src/index.ts b/packages/jest-transform/src/index.ts
index 48bd4a688248..ada1dd88716e 100644
--- a/packages/jest-transform/src/index.ts
+++ b/packages/jest-transform/src/index.ts
@@ -15,5 +15,6 @@ export type {
   ShouldInstrumentOptions,
   Options as TransformationOptions,
   TransformResult,
+  TransformedSource,
 } from './types';
 export {default as handlePotentialSyntaxError} from './enhanceUnexpectedTokenMessage';
diff --git a/packages/jest-transform/src/types.ts b/packages/jest-transform/src/types.ts
index a826105e2630..9cf2716dbfee 100644
--- a/packages/jest-transform/src/types.ts
+++ b/packages/jest-transform/src/types.ts
@@ -32,10 +32,9 @@ interface FixedRawSourceMap extends SourceMapWithVersion {
   version: number;
 }
 
-export type TransformedSource = {
-  code: string;
-  map?: FixedRawSourceMap | string | null;
-};
+export type TransformedSource =
+  | {code: string; map?: FixedRawSourceMap | string | null}
+  | string;
 
 export type TransformResult = {
   code: string;
@@ -70,5 +69,5 @@ export interface Transformer {
     sourcePath: Config.Path,
     config: Config.ProjectConfig,
     options?: TransformOptions,
-  ) => string | TransformedSource;
+  ) => TransformedSource;
 }

From 56a0f71c8d6127ed867113e27e266b18ccac2744 Mon Sep 17 00:00:00 2001
From: Simen Bekkhus <sbekkhus91@gmail.com>
Date: Wed, 1 Apr 2020 02:37:04 +0200
Subject: [PATCH 2/2] link to PR

---
 CHANGELOG.md | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/CHANGELOG.md b/CHANGELOG.md
index 8ad45be90da4..c11c78045dae 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -6,7 +6,7 @@
 
 ### Chore & Maintenance
 
-- `[@jest/transform]` Expose type `TransformedSource`
+- `[@jest/transform]` Expose type `TransformedSource` ([#9736](https://github.com/facebook/jest/pull/9736))
 
 ### Performance
 
@@ -19,7 +19,7 @@
 ### Fixes
 
 - `[jest-circus]` Fix type elision of jest-runtime imports ([#9717](https://github.com/facebook/jest/pull/9717))
-- `[@jest/transform]` Fix coverage reporter for uncovered files without transformers, reverting ([#9460](https://github.com/facebook/jest/pull/9460)) ([#9724](https://github.com/facebook/jest/pull/9724))
+- `[@jest/transform]` Fix coverage reporter for uncovered files without transformers, reverting [#9460](https://github.com/facebook/jest/pull/9460) ([#9724](https://github.com/facebook/jest/pull/9724))
 
 ## 25.2.3