[next] Start a clean session when user logs in / out (#1853)

* Clear user session after login / logout

* Filename cases

* Improve type checking

* Apply suggestions

src/core/client/stream/test/create.tsx

@@ -1,4 +1,6 @@
+import { EventEmitter2 } from "eventemitter2";
 import { IResolvers } from "graphql-tools";
+import { noop } from "lodash";
 import React from "react";
 import TestRenderer from "react-test-renderer";
 import { Environment, RecordProxy, RecordSourceProxy } from "relay-runtime";
@@ -30,7 +32,6 @@ export default function create(params: CreateParams) {
     logNetwork: params.logNetwork,
     resolvers: params.resolvers,
     initLocalState: (localRecord, source, env) => {
-      localRecord.setValue(0, "authRevision");
       if (params.initLocalState) {
         params.initLocalState(localRecord, source, env);
       }
@@ -46,6 +47,8 @@ export default function create(params: CreateParams) {
     postMessage: new PostMessageService(),
     browserInfo: { ios: false },
     uuidGenerator: createUUIDGenerator(),
+    eventEmitter: new EventEmitter2({ wildcard: true, maxListeners: 20 }),
+    clearSession: noop,
   };
 
   const testRenderer = TestRenderer.create(

src/core/client/stream/test/postComment.spec.tsx

@@ -11,14 +11,8 @@ let testRenderer: ReactTestRenderer;
 beforeEach(() => {
   const resolvers = {
     Query: {
-      asset: createSinonStub(
-        s => s.throws(),
-        s => s.withArgs(undefined, { id: assets[0].id }).returns(assets[0])
-      ),
-      me: createSinonStub(
-        s => s.throws(),
-        s => s.withArgs(undefined, { clientAuthRevision: 0 }).returns(users[0])
-      ),
+      asset: createSinonStub(s => s.throws(), s => s.returns(assets[0])),
+      me: createSinonStub(s => s.throws(), s => s.returns(users[0])),
     },
     Mutation: {
       createComment: createSinonStub(

src/core/client/stream/test/postReply.spec.tsx

@@ -11,14 +11,8 @@ let testRenderer: ReactTestRenderer;
 beforeEach(() => {
   const resolvers = {
     Query: {
-      asset: createSinonStub(
-        s => s.throws(),
-        s => s.withArgs(undefined, { id: assets[0].id }).returns(assets[0])
-      ),
-      me: createSinonStub(
-        s => s.throws(),
-        s => s.withArgs(undefined, { clientAuthRevision: 0 }).returns(users[0])
-      ),
+      asset: createSinonStub(s => s.throws(), s => s.returns(assets[0])),
+      me: createSinonStub(s => s.throws(), s => s.returns(users[0])),
     },
     Mutation: {
       createComment: createSinonStub(