unit test to verify customData upon user-disabled error.

Author: prameshj

packages/auth/src/api/authentication/idp.test.ts

@@ -87,4 +87,35 @@ describe('api/authentication/signInWithIdp', () => {
     );
     expect(mock.calls[0].request).to.eql(request);
   });
+  it('should handle user disabled errors and propagate email info', async () => {
+    const mock = mockEndpoint(
+      Endpoint.SIGN_IN_WITH_IDP,
+      {
+        email: "[email protected]",
+        error: {
+          code: 400,
+          message: ServerError.USER_DISABLED,
+          errors: [
+            {
+              message: ServerError.USER_DISABLED
+            }
+          ]
+        }
+      },
+      400
+    );
+
+    let error: FirebaseError | null = null;
+    try {
+    await signInWithIdp(auth, request);
+    } catch (e) {
+      error = e;
+    }
+    expect(error!.customData!.email).to.eq("[email protected]");
+    expect(error!.code).to.eq(
+      'auth/user-disabled'
+    );
+
+    expect(mock.calls[0].request).to.eql(request);
+  });
 });