ref(backend): Delete Backend classes (#4919)

Delete the Backend classes. Specifically the following classes and files are removed:

* `Backend (interface)`
* `BaseBackend`*
* `BrowserBackend`
* `NodeBackend`
* `TestBackend`*

*`Options` interfaces in these files were moved to the respective Client files

Additionally,

* delete (the previously ported) `NoopTransport` test in packages/browser/test/unit/backend.test.ts.
* adjust a few remaining Backend references in tests to use Client classes
* adjust `BaseBackend` documentation to no longer include Backend information

packages/browser/src/client.ts

@@ -1,22 +1,40 @@
 import { BaseClient, getEnvelopeEndpointWithUrlEncodedAuth, initAPIDetails, Scope, SDK_VERSION } from '@sentry/core';
-import { Event, EventHint, Severity, Transport, TransportOptions } from '@sentry/types';
+import { Event, EventHint, Options, Severity, Transport, TransportOptions } from '@sentry/types';
 import { getGlobalObject, logger, supportsFetch } from '@sentry/utils';
 
-import { BrowserBackend, BrowserOptions } from './backend';
 import { eventFromException, eventFromMessage } from './eventbuilder';
 import { IS_DEBUG_BUILD } from './flags';
 import { injectReportDialog, ReportDialogOptions } from './helpers';
 import { Breadcrumbs } from './integrations';
 import { FetchTransport, makeNewFetchTransport, makeNewXHRTransport, XHRTransport } from './transports';
 
+/**
+ * Configuration options for the Sentry Browser SDK.
+ * @see BrowserClient for more information.
+ */
+export interface BrowserOptions extends Options {
+  /**
+   * A pattern for error URLs which should exclusively be sent to Sentry.
+   * This is the opposite of {@link Options.denyUrls}.
+   * By default, all errors will be sent.
+   */
+  allowUrls?: Array<string | RegExp>;
+
+  /**
+   * A pattern for error URLs which should not be sent to Sentry.
+   * To allow certain errors instead, use {@link Options.allowUrls}.
+   * By default, all errors will be sent.
+   */
+  denyUrls?: Array<string | RegExp>;
+}
+
 /**
  * The Sentry Browser SDK Client.
  *
  * @see BrowserOptions for documentation on configuration options.
  * @see SentryClient for usage documentation.
- * TODO(v7): remove BrowserBackend
  */
-export class BrowserClient extends BaseClient<BrowserBackend, BrowserOptions> {
+export class BrowserClient extends BaseClient<BrowserOptions> {
   /**
    * Creates a new Browser SDK instance.
    *
@@ -35,8 +53,7 @@ export class BrowserClient extends BaseClient<BrowserBackend, BrowserOptions> {
       version: SDK_VERSION,
     };
 
-    // TODO(v7): remove BrowserBackend param
-    super(BrowserBackend, options);
+    super(options);
   }
 
   /**

packages/browser/src/exports.ts

@@ -41,9 +41,7 @@ export {
   withScope,
 } from '@sentry/core';
 
-// TODO(v7): refactor to use client here!
-export { BrowserOptions } from './backend';
-export { BrowserClient } from './client';
+export { BrowserClient, BrowserOptions } from './client';
 export { injectReportDialog, ReportDialogOptions } from './helpers';
 export { defaultIntegrations, forceLoad, init, lastEventId, onLoad, showReportDialog, flush, close, wrap } from './sdk';
 export { SDK_NAME } from './version';

packages/browser/src/sdk.ts

@@ -2,8 +2,7 @@ import { getCurrentHub, initAndBind, Integrations as CoreIntegrations } from '@s
 import { Hub } from '@sentry/types';
 import { addInstrumentationHandler, getGlobalObject, logger, resolvedSyncPromise } from '@sentry/utils';
 
-import { BrowserOptions } from './backend';
-import { BrowserClient } from './client';
+import { BrowserClient, BrowserOptions } from './client';
 import { IS_DEBUG_BUILD } from './flags';
 import { ReportDialogOptions, wrap as internalWrap } from './helpers';
 import { Breadcrumbs, Dedupe, GlobalHandlers, LinkedErrors, TryCatch, UserAgent } from './integrations';

packages/browser/test/unit/integrations/linkederrors.test.ts

@@ -1,6 +1,6 @@
 import { ExtendedError } from '@sentry/types';
 
-import { BrowserBackend } from '../../../src/backend';
+import { BrowserClient } from '../../../src/client';
 import * as LinkedErrorsModule from '../../../src/integrations/linkederrors';
 
 describe('LinkedErrors', () => {
@@ -34,9 +34,8 @@ describe('LinkedErrors', () => {
       one.cause = two;
 
       const originalException = one;
-      // TODO(v7): refactor to use client here!
-      const backend = new BrowserBackend({});
-      return backend.eventFromException(originalException).then(event => {
+      const client = new BrowserClient({});
+      return client.eventFromException(originalException).then(event => {
         const result = LinkedErrorsModule._handler('cause', 5, event, {
           originalException,
         });
@@ -65,9 +64,8 @@ describe('LinkedErrors', () => {
       one.reason = two;
 
       const originalException = one;
-      const backend = new BrowserBackend({});
-      // TODO(v7): refactor to use client here!
-      return backend.eventFromException(originalException).then(event => {
+      const client = new BrowserClient({});
+      return client.eventFromException(originalException).then(event => {
         const result = LinkedErrorsModule._handler('reason', 5, event, {
           originalException,
         });
@@ -92,10 +90,9 @@ describe('LinkedErrors', () => {
       one.cause = two;
       two.cause = three;
 
-      const backend = new BrowserBackend({});
+      const client = new BrowserClient({});
       const originalException = one;
-      // TODO(v7): refactor to use client here!
-      return backend.eventFromException(originalException).then(event => {
+      return client.eventFromException(originalException).then(event => {
         const result = LinkedErrorsModule._handler('cause', 2, event, {
           originalException,
         });