fix: regionHostname should be from resolvedRegion

Author: trivikr

packages/config-resolver/src/regionInfo/getRegionInfo.spec.ts

@@ -85,9 +85,10 @@ describe(getRegionInfo.name, () => {
         partition: mockPartition,
       });
 
-      expect(getResolvedHostname).toHaveBeenCalledWith(getMockResolvedRegion(regionCase), {
+      const mockResolvedRegion = getMockResolvedRegion(regionCase);
+      expect(getResolvedHostname).toHaveBeenCalledWith(mockResolvedRegion, {
         signingService: mockSigningService,
-        regionHostname: mockGetRegionInfoOptions.regionHash[mockRegion]?.hostname,
+        regionHostname: mockGetRegionInfoOptions.regionHash[mockResolvedRegion]?.hostname,
         partitionHostname: mockGetRegionInfoOptions.partitionHash[mockPartition]?.hostname,
       });
       expect(getResolvedPartition).toHaveBeenCalledWith(mockRegion, mockGetResolvedPartitionOptions);
@@ -138,9 +139,10 @@ describe(getRegionInfo.name, () => {
         signingRegion: mockSigningRegion,
       });
 
-      expect(getResolvedHostname).toHaveBeenCalledWith(getMockResolvedRegion(regionCase), {
+      const mockResolvedRegion = getMockResolvedRegion(regionCase);
+      expect(getResolvedHostname).toHaveBeenCalledWith(mockResolvedRegion, {
         signingService: mockSigningService,
-        regionHostname: mockGetRegionInfoOptions.regionHash[mockRegion]?.hostname,
+        regionHostname: mockGetRegionInfoOptions.regionHash[mockResolvedRegion]?.hostname,
         partitionHostname: mockGetRegionInfoOptions.partitionHash[mockPartition]?.hostname,
       });
       expect(getResolvedPartition).toHaveBeenCalledWith(mockRegion, mockGetResolvedPartitionOptions);
@@ -190,9 +192,10 @@ describe(getRegionInfo.name, () => {
         partition: mockPartition,
       });
 
-      expect(getResolvedHostname).toHaveBeenCalledWith(getMockResolvedRegion(regionCase), {
+      const mockResolvedRegion = getMockResolvedRegion(regionCase);
+      expect(getResolvedHostname).toHaveBeenCalledWith(mockResolvedRegion, {
         signingService: mockSigningService,
-        regionHostname: mockGetRegionInfoOptions.regionHash[mockRegion]?.hostname,
+        regionHostname: mockGetRegionInfoOptions.regionHash[mockResolvedRegion]?.hostname,
         partitionHostname: mockGetRegionInfoOptions.partitionHash[mockPartition]?.hostname,
       });
       expect(getResolvedPartition).toHaveBeenCalledWith(mockRegion, mockGetResolvedPartitionOptions);

packages/config-resolver/src/regionInfo/getRegionInfo.ts

@@ -22,7 +22,7 @@ export const getRegionInfo = (
     signingService,
     hostname: getResolvedHostname(resolvedRegion, {
       signingService,
-      regionHostname: regionHash[region]?.hostname,
+      regionHostname: regionHash[resolvedRegion]?.hostname,
       partitionHostname: partitionHash[partition]?.hostname,
     }),
     ...(regionHash[resolvedRegion]?.signingRegion && {