Add first login workflow test

4 files changed, 166 insertions, 1 deletions

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));