Report errors when creating AzureBlobPublisher and requirements are not satisfied

packages/techdocs-common/__mocks__/@azure/storage-blob.ts

@@ -29,7 +29,9 @@ export class BlockBlobClient {
   uploadFile(source: string): Promise<BlobUploadCommonResponse> {
     return Promise.resolve({
       _response: {
-        request: {} as any,
+        request: {
+          url: `https://example.blob.core.windows.net`,
+        } as any,
         status: 200,
         headers: {} as any,
       },
@@ -45,7 +47,9 @@ class BlockBlobClientFailUpload extends BlockBlobClient {
   uploadFile(source: string): Promise<BlobUploadCommonResponse> {
     return Promise.resolve({
       _response: {
-        request: {} as any,
+        request: {
+          url: `https://example.blob.core.windows.net`,
+        } as any,
         status: 500,
         headers: {} as any,
       },
@@ -63,7 +67,9 @@ export class ContainerClient {
   getProperties(): Promise<ContainerGetPropertiesResponse> {
     return Promise.resolve({
       _response: {
-        request: {} as any,
+        request: {
+          url: `https://example.blob.core.windows.net`,
+        } as any,
         status: 200,
         headers: {} as any,
         parsedHeaders: {},
@@ -80,7 +86,9 @@ class ContainerClientFailGetProperties extends ContainerClient {
   getProperties(): Promise<ContainerGetPropertiesResponse> {
     return Promise.resolve({
       _response: {
-        request: {} as any,
+        request: {
+          url: `https://example.blob.core.windows.net`,
+        } as any,
         status: 404,
         headers: {} as any,
         parsedHeaders: {},

packages/techdocs-common/src/stages/publish/azureBlobStorage.test.ts

@@ -173,10 +173,19 @@ describe('error reporting', () => {
 
     const logger = createLogger();
 
-    publisher = await AzureBlobStoragePublish.fromConfig(mockConfig, logger);
+    let error;
+    try {
+      publisher = await AzureBlobStoragePublish.fromConfig(mockConfig, logger);
+    } catch (e) {
+      error = e;
+    }
+
+    expect(error).toBeInstanceOf(Error);
 
     expect(logger.error).toHaveBeenCalledWith(
-      `Could not read Azure Blob Storage container properties`,
+      expect.stringContaining(
+        `Could not retrieve metadata about the Azure Blob Storage container bad_container.`,
+      ),
     );
   });
 

packages/techdocs-common/src/stages/publish/azureBlobStorage.ts

@@ -79,31 +79,25 @@ export class AzureBlobStoragePublish implements PublisherBase {
       credential,
     );
 
-    await storageClient
-      .getContainerClient(containerName)
-      .getProperties()
-      .then(result => {
-        if (result?._response?.status >= 400) {
-          logger.error(
-            'Could not read Azure Blob Storage container properties',
-          );
-        } else {
-          logger.info(
-            `Successfully connected to the Azure Blob Storage container ${containerName}.`,
-          );
-        }
-      })
-      .catch(reason => {
-        logger.error(
-          `Could not retrieve metadata about the Azure Blob Storage container ${containerName}. ` +
-            'Make sure that the Azure project and container exist and the access key is setup correctly ' +
-            'techdocs.publisher.azureBlobStorage.credentials defined in app config has correct permissions. ' +
-            'Refer to https://backstage.io/docs/features/techdocs/using-cloud-storage',
-        );
+    try {
+      const metadata = await storageClient
+        .getContainerClient(containerName)
+        .getProperties();
+
+      if (metadata._response.status >= 400) {
         throw new Error(
-          `from Azure Blob Storage client library: ${reason.message}`,
+          `Failed to retrieve metadata from ${metadata._response.request.url} with status code ${metadata._response.status}.`,
         );
-      });
+      }
+    } catch (e) {
+      logger.error(
+        `Could not retrieve metadata about the Azure Blob Storage container ${containerName}. ` +
+          'Make sure that the Azure project and container exist and the access key is setup correctly ' +
+          'techdocs.publisher.azureBlobStorage.credentials defined in app config has correct permissions. ' +
+          'Refer to https://backstage.io/docs/features/techdocs/using-cloud-storage',
+      );
+      throw new Error(`from Azure Blob Storage client library: ${e.message}`);
+    }
 
     return new AzureBlobStoragePublish(storageClient, containerName, logger);
   }