Fix tests

Author: sam-gc

packages-exp/auth-exp/src/core/credentials/saml.test.ts

@@ -86,7 +86,7 @@ describe('core/credentials/saml', () => {
       expect(request.requestUri).to.eq('http://localhost');
       expect(request.returnSecureToken).to.be.true;
       expect(request.pendingToken).to.eq('pending-token');
-      expect(request.postBody).to.be.null;
+      expect(request.postBody).to.be.undefined;
     });
   });
 
@@ -101,22 +101,22 @@ describe('core/credentials/saml', () => {
       await cred._getIdTokenResponse(auth);
 
       const request = signInWithIdp.calls[0].request as SignInWithIdpRequest;
-      expect(request.postBody).to.be.null;
+      expect(request.postBody).to.be.undefined;
       expect(request.pendingToken).to.eq('pending-token');
     });
 
     it('_linkToIdToken sets the idToken field on the request', async () => {
       await cred._linkToIdToken(auth, 'new-id-token');
       const request = signInWithIdp.calls[0].request as SignInWithIdpRequest;
-      expect(request.postBody).to.be.null;
+      expect(request.postBody).to.be.undefined;
       expect(request.pendingToken).to.eq('pending-token');
       expect(request.idToken).to.eq('new-id-token');
     });
 
     it('_getReauthenticationResolver sets autoCreate to false', async () => {
       await cred._getReauthenticationResolver(auth);
       const request = signInWithIdp.calls[0].request as SignInWithIdpRequest;
-      expect(request.postBody).to.be.null;
+      expect(request.postBody).to.be.undefined;
       expect(request.pendingToken).to.eq('pending-token');
       expect(request.autoCreate).to.be.false;
     });

packages-exp/auth-exp/src/core/credentials/saml.ts

@@ -117,7 +117,6 @@ export class SAMLAuthCredential extends AuthCredential {
       requestUri: IDP_REQUEST_URI,
       returnSecureToken: true,
       pendingToken: this.pendingToken,
-      postBody: null
     };
   }
 }