Add first login workflow test

6 files changed, 200 insertions, 8 deletions

diff --git a/app/app.js b/app/app.js
index 499ffe18c4..bff4c7f6fc 100644
--- a/app/app.js
+++ b/app/app.js
@@ -21,7 +21,7 @@ import type { TrayIconType } from './lib/tray-icon-manager';
 const initialState = null;
 const memoryHistory = createMemoryHistory();
 const store = configureStore(initialState, memoryHistory);
-const backend = new Backend();
+const backend = new Backend(store);
 
 // reset login state if user quit the app during login
 if((['connecting', 'failed']: Array<LoginState>).includes(store.getState().account.status)) {
diff --git a/app/lib/backend.js b/app/lib/backend.js
index 076a49ca32..4cd2cf49e9 100644
--- a/app/lib/backend.js
+++ b/app/lib/backend.js
@@ -3,6 +3,9 @@ import log from 'electron-log';
 import EventEmitter from 'events';
 import { servers } from '../config';
 import { IpcFacade, RealIpc } from './ipc-facade';
+import accountActions from '../redux/account/actions';
+import type { ReduxStore } from '../redux/store';
+import { push } from 'react-router-redux';
 
 export type EventType = 'connect' | 'connecting' | 'disconnect' | 'login' | 'logging' | 'logout' | 'updatedIp' | 'updatedLocation' | 'updatedReachability';
 export type ErrorType = 'NO_CREDIT' | 'NO_INTERNET' | 'INVALID_ACCOUNT';
@@ -61,9 +64,11 @@ export class BackendError extends Error {
 export class Backend {
 
   _ipc: IpcFacade;
+  _store: ReduxStore;
   _eventEmitter = new EventEmitter();
 
-  constructor(ipc: ?IpcFacade) {
+  constructor(store: ReduxStore, ipc: ?IpcFacade) {
+    this._store = store;
     this._ipc = ipc || new RealIpc('');
     this._registerIpcListeners();
     this._startReachability();
@@ -131,17 +136,24 @@ export class Backend {
     };
   }
 
-  login(account: string) {
-    log.info('Attempting to login with account number', account);
+
+  login(accountNumber: string) {
+    log.info('Attempting to login with account number', accountNumber);
 
     // emit: logging in
-    this._emit('logging', { accountNumber: account }, null);
+    this._emit('logging', { accountNumber: accountNumber }, null);
+
+    this._store.dispatch(accountActions.loginChange({
+      accountNumber: accountNumber,
+      status: 'connecting',
+      error: null,
+    }));
 
-    this._ipc.getAccountData(account)
+    this._ipc.getAccountData(accountNumber)
       .then( response => {
         log.info('Account exists', response);
 
-        return this._ipc.setAccount(account)
+        return this._ipc.setAccount(accountNumber)
           .then( () => response );
 
       }).then( accountData => {
@@ -151,13 +163,28 @@ export class Backend {
           paidUntil: accountData.paid_until,
         }, undefined);
 
+        this._store.dispatch(accountActions.loginChange({
+          status: 'ok',
+          paidUntil: accountData.paid_until,
+          error: null,
+        }));
+
+        this._store.dispatch(push('/connect'));
       }).catch(e => {
         log.error('Failed to log in', e);
+
+        // TODO: This is not true. If there is a communication link failure the promise will be rejected too
         const err = new BackendError('INVALID_ACCOUNT');
+        this._store.dispatch(accountActions.loginChange({
+          status: 'failed',
+          error: err,
+        }));
+
         this._emit('login', {}, err);
       });
   }
 
+
   logout() {
     // @TODO: What does it mean for a logout to be successful or failed?
     this._ipc.setAccount('')
diff --git a/test/helpers/IpcChain.js b/test/helpers/IpcChain.js
new file mode 100644
index 0000000000..247ea0526b
--- /dev/null
+++ b/test/helpers/IpcChain.js
@@ -0,0 +1,84 @@
+// @flow
+
+import { expect } from 'chai';
+import { check, failFast } from './ipc-helpers';
+
+export class IpcChain {
+  _expectedCalls: Array<string>;
+  _recordedCalls: Array<string>;
+  _mockIpc: {};
+  _done: (*) => void;
+
+  constructor(mockIpc: {}, done: (*) => void) {
+    this._expectedCalls = [];
+    this._recordedCalls = [];
+    this._mockIpc = mockIpc;
+    this._done = done;
+  }
+
+  addRequiredStep(ipcCall: string): StepBuilder {
+    this._expectedCalls.push(ipcCall);
+    return new StepBuilder(ipcCall, this._addStep.bind(this));
+  }
+
+  _addStep(step: StepBuilder) {
+    const me = this;
+    this._mockIpc[step.ipcCall] = function() {
+      return new Promise(r => me._stepPromiseCallback(step, r, arguments));
+    };
+  }
+
+  _stepPromiseCallback(step, resolve, args) {
+    this._registerCall(step.ipcCall);
+
+    if (step.inputValidation) {
+      failFast(() => step.inputValidation(...args), this._done);
+    }
+
+    if (this._isLastCall()) {
+      this._ensureChainCalledCorrectly();
+    }
+
+    resolve(step.returnValue);
+  }
+
+  _isLastCall(): boolean {
+    return this._recordedCalls.length === this._expectedCalls.length;
+  }
+
+  _ensureChainCalledCorrectly() {
+    check(() => {
+      expect(this._expectedCalls).to.deep.equal(this._recordedCalls);
+    }, this._done);
+  }
+
+  _registerCall(ipcCall: string) {
+    this._recordedCalls.push(ipcCall);
+  }
+}
+
+class StepBuilder {
+  ipcCall: string;
+  inputValidation: () => void;
+  returnValue: *;
+  _cb: (StepBuilder) => void;
+
+  constructor(ipcCall: string, cb: (StepBuilder)=> void) {
+    this.ipcCall = ipcCall;
+    this._cb = cb;
+  }
+
+  withInputValidation(iv: () => void): StepBuilder {
+    this.inputValidation = iv;
+    return this;
+  }
+
+  withReturnValue(rv: *): StepBuilder {
+    this.returnValue = rv;
+    return this;
+  }
+
+  done() {
+    this._cb(this);
+  }
+}
diff --git a/test/helpers/ipc-helpers.js b/test/helpers/ipc-helpers.js
new file mode 100644
index 0000000000..39fc9fba06
--- /dev/null
+++ b/test/helpers/ipc-helpers.js
@@ -0,0 +1,51 @@
+// @flow
+
+import { Backend } from '../../app/lib/backend';
+import { newMockIpc } from '../mocks/ipc';
+import configureStore from '../../app/redux/store';
+import { createMemoryHistory } from 'history';
+
+type DoneCallback = (?mixed) => void;
+type Check = () => void;
+
+// Mock localStorage because redux-localstorage has no test helpers
+// We use redux-localstorage when we setup the redux store to have the
+// store persist when the application is shut down.
+global.localStorage = {getItem: ()=>'{}', setItem: ()=>{}};
+
+export function setupBackendAndStore() {
+
+  const memoryHistory = createMemoryHistory();
+  const store = configureStore(null, memoryHistory);
+  
+  const mockIpc = newMockIpc();
+
+  const backend = new Backend(store, mockIpc);
+
+  return { store, mockIpc, backend };
+}
+
+// chai and async aren't the best of friends. To allow us
+// to get the assertion error in the output of failed async
+// tests we need to do this try-catch thing.
+export function check(fn: Check, done: DoneCallback) {
+  try {
+    fn();
+    done();
+  } catch (e) {
+    done(e);
+  }
+}
+
+
+// In async tests where we want to test a chain of IPC messages
+// we can only invoke `done` for the last message. This function
+// is for the intermediate messages.
+export function failFast(fn: Check, done: DoneCallback) {
+  try {
+    fn();
+  } catch(e) {
+    done(e);
+  }
+}
+
diff --git a/test/login.spec.js b/test/login.spec.js
new file mode 100644
index 0000000000..84ca0f431a
--- /dev/null
+++ b/test/login.spec.js
@@ -0,0 +1,30 @@
+// @flow
+
+import { expect } from 'chai';
+import { setupBackendAndStore } from './helpers/ipc-helpers';
+import { IpcChain } from './helpers/IpcChain';
+import accountActions from '../app/redux/account/actions';
+
+describe('Logging in', () => {
+
+  it('should validate the account number and then set it in the backend', (done) => {
+    const { store, mockIpc, backend } = setupBackendAndStore();
+
+    const chain = new IpcChain(mockIpc, done);
+    chain.addRequiredStep('getAccountData')
+      .withInputValidation((an) => {
+        expect(an).to.equal('123');
+      })
+      .done();
+
+    chain.addRequiredStep('setAccount')
+      .withInputValidation((an) => {
+        expect(an).to.equal('123');
+      })
+      .done();
+
+    const action: any = accountActions.login(backend, '123');
+    store.dispatch(action);
+  });
+});
+
diff --git a/test/routing.spec.js b/test/routing.spec.js
index 3e1f80be3c..ccb702de8b 100644
--- a/test/routing.spec.js
+++ b/test/routing.spec.js
@@ -24,7 +24,7 @@ describe('routing', function() {
     });
 
     const store = mockStore(state);
-    const backend = new Backend(newMockIpc());
+    const backend = new Backend(store, newMockIpc());
     mapBackendEventsToRouter(backend, store);
 
     store.dispatch(accountActions.logout(backend));