fix: added generateESM flag to packageJson options (#6172)

* bugfix: added generateESM flag to packageJson options corresponding test

* Added missing changeset file

* Fixed PR pipeline

* Changeset: added change type

* Modifies changeset file and added a failing test

Author: BrigittaK307

.changeset/cool-tigers-make.md

@@ -0,0 +1,5 @@
+---
+'@sap-cloud-sdk/openapi': minor
+---
+
+[Fixed Issue] Fix missing `type: module` in generated `package.json` when `--generateESM` option is enabled.

packages/openapi-generator/src/file-serializer/package-json.spec.ts

@@ -21,4 +21,27 @@ describe('packageJson', () => {
     );
     expect(parsed.license).toBe('UNLICENSED');
   });
+
+  it('includes type module when generateESM is true', () => {
+    const parsed = JSON.parse(
+      packageJson({
+        npmPackageName: 'workflow-service',
+        description: 'description',
+        sdkVersion: '1.35.0',
+        generateESM: true
+      })
+    );
+    expect(parsed.type).toBe('module');
+  });
+
+  it('includes type module when generateESM is undefined', () => {
+    const parsed = JSON.parse(
+      packageJson({
+        npmPackageName: 'workflow-service',
+        description: 'description',
+        sdkVersion: '1.35.0'
+      })
+    );
+    expect(parsed.type).toBeUndefined();
+  });
 });

packages/openapi-generator/src/generator.ts

@@ -344,7 +344,8 @@ async function generatePackageJson(
     packageJson({
       npmPackageName: openApiDocument.serviceOptions.packageName,
       description: packageDescription(openApiDocument.serviceName),
-      sdkVersion: await getSdkVersion()
+      sdkVersion: await getSdkVersion(),
+      generateESM: options.generateESM
     }),
     createFileOptions
   );