extract type

Author: SimenB

lib/createJestRunner.ts

@@ -30,6 +30,8 @@ class CancelRun extends Error {
   }
 }
 
+type TestRunner = (runTestOptions: RunTestOptions) => TestResult;
+
 export default function createRunner<
   ExtraOptions extends Record<string, unknown>,
 >(
@@ -87,9 +89,7 @@ export default function createRunner<
       onFailure: OnTestFailure,
       options: TestRunnerOptions,
     ): Promise<void> {
-      const runner: (runTestOptions: RunTestOptions) => TestResult = (
-        await import(runPath)
-      ).default;
+      const runner: TestRunner = (await import(runPath)).default;
 
       const mutex = pLimit(1);
       return tests.reduce(
@@ -136,9 +136,7 @@ export default function createRunner<
         exposedMethods: ['default'],
         numWorkers: this.#globalConfig.maxWorkers,
         forkOptions: { stdio: 'inherit' },
-      }) as JestWorkerFarm<{
-        default: (runTestOptions: RunTestOptions) => TestResult;
-      }>;
+      }) as JestWorkerFarm<{ default: TestRunner }>;
 
       const mutex = pLimit(this.#globalConfig.maxWorkers);