Mock Service Worker: Update provisioning/sources handlers

This commit adds mock service worker handlers for the
/provisioning/sources and /provisioning/${ID}/account_identity
endpoints. These API mocks are necessary as requests to these endpoints are
now made by the new aws sources feature.

src/test/mocks/handlers.js

@@ -5,17 +5,43 @@ import { PROVISIONING_SOURCES_ENDPOINT } from '../../constants';
 const baseURL = 'http://localhost';
 
 export const handlers = [
-  rest.get(baseURL.concat(PROVISIONING_SOURCES_ENDPOINT), (req, res, ctx) => {
-    return res(
-      ctx.status(200),
-      ctx.json([
-        {
-          id: '123',
-          name: 'my_source',
-          source_type_id: '1',
-          uid: 'de5e35d4-4c1f-49d7-9ef3-7d08e6b9c76a',
-        },
-      ])
-    );
-  }),
+  rest.get(
+    baseURL.concat(`${PROVISIONING_SOURCES_ENDPOINT}`),
+    (req, res, ctx) => {
+      const provider = req.url.searchParams.get('provider');
+      if (provider === 'aws') {
+        return res(
+          ctx.status(200),
+          ctx.json([
+            {
+              id: '123',
+              name: 'my_source',
+              source_type_id: '1',
+              uid: 'de5e35d4-4c1f-49d7-9ef3-7d08e6b9c76a',
+            },
+          ])
+        );
+      }
+    }
+  ),
+  rest.get(
+    baseURL.concat(
+      `${PROVISIONING_SOURCES_ENDPOINT}/:accountId/account_identity`
+    ),
+    (req, res, ctx) => {
+      const { accountId } = req.params;
+      if (accountId === '123') {
+        return res(
+          ctx.status(200),
+          ctx.json({
+            aws: {
+              account_id: '123456789012',
+            },
+          })
+        );
+      } else {
+        return res(ctx.status(404));
+      }
+    }
+  ),
 ];