feat(@embark/test-runner): make vm default node (#1846)

* feat: make vm default node

* feat(@embark/tests): enable switching node between tests

dapps/templates/demo/test/simple_storage_spec.js

@@ -5,7 +5,7 @@ let accounts;
 
 // For documentation please see https://embark.status.im/docs/contracts_testing.html
 config({
-  //deployment: {
+  //blockchain: {
   //  accounts: [
   //    // you can configure custom accounts with a custom balance
   //    // see https://embark.status.im/docs/contracts_testing.html#Configuring-accounts
@@ -31,7 +31,7 @@ contract("SimpleStorage", function () {
   });
 
   it("set storage value", async function () {
-    await SimpleStorage.methods.set(150).send();
+    await SimpleStorage.methods.set(150).send({from: web3.eth.defaultAccount});
     let result = await SimpleStorage.methods.get().call();
     assert.strictEqual(parseInt(result, 10), 150);
   });

packages/core/core/constants.json

@@ -35,6 +35,7 @@
     "webpackDone": "webpackDone"
   },
   "blockchain": {
+    "vm": "vm",
     "call": "eth_call",
     "clients": {
       "geth": "geth",

packages/embark/src/cmd/cmd_controller.js

@@ -708,9 +708,7 @@ simulator(_options) {
 
     const Engine = require('../lib/core/engine.js');
     const engine = new Engine({
-      // TODO: this should not be necessary
+      env: options.env,
-      env: "development",
-      //env: options.env,
       client: options.client,
       locale: options.locale,
       version: this.version,
@@ -743,23 +741,6 @@ simulator(_options) {
         engine.registerModuleGroup("pipeline");
         engine.registerModuleGroup("tests", options);
 
-        let plugin = engine.plugins.createPlugin('cmdcontrollerplugin', {});
-        plugin.registerActionForEvent("embark:engine:started", async (_params, cb) => {
-          try {
-            await engine.events.request2("blockchain:node:start", engine.config.blockchainConfig);
-
-            await Promise.all([
-              engine.events.request2("storage:node:start", engine.config.storageConfig),
-              engine.events.request2("communication:node:start", engine.config.communicationConfig),
-              engine.events.request2("namesystem:node:start", engine.config.namesystemConfig)
-            ]);
-          } catch (e) {
-            return cb(e);
-          }
-
-          cb();
-        });
-
         engine.startEngine(next);
       },
       function setupTestEnvironment(next) {

packages/embark/src/lib/core/configDefaults.js

@@ -22,7 +22,7 @@ export function getBlockchainDefaults(env) {
     wsHost: "localhost",
     wsPort: 8546,
     networkType: "custom",
-    miningMode: 'dev',
+    isDev: true,
     nodiscover: true,
     maxpeers: 0,
     targetGasLimit: 8000000,

packages/embark/src/lib/core/engine.js

@@ -211,6 +211,7 @@ class Engine {
 
   contractsComponents(_options) {
     this.registerModule('ethereum-blockchain-client');
+    this.registerModule('ganache');
     this.registerModulePackage('embark-web3');
     this.registerModulePackage('embark-accounts-manager');
     this.registerModulePackage('embark-specialconfigs', {plugins: this.plugins});

packages/embark/src/lib/modules/blockchain/index.js

@@ -1,5 +1,6 @@
 import async from 'async';
 const {__} = require('embark-i18n');
+const constants = require('embark-core/constants');
 const Web3RequestManager = require('web3-core-requestmanager');
 
 import BlockchainAPI from "./api";
@@ -12,7 +13,7 @@ class Blockchain {
     this.blockchainConfig = embark.config.blockchainConfig;
     this.contractConfig = embark.config.contractConfig;
     this.blockchainApi = new BlockchainAPI(embark);
-
+    this.startedClient = null;
 
     embark.registerActionForEvent("pipeline:generateAll:before", this.addArtifactFile.bind(this));
 
@@ -22,6 +23,16 @@ class Blockchain {
     });
 
     this.events.setCommandHandler("blockchain:node:start", async (blockchainConfig, cb) => {
+      const self = this;
+      const clientName = blockchainConfig.client;
+      function started() {
+        self.startedClient = clientName;
+        self.events.emit("blockchain:started", clientName);
+      }
+      if (clientName === constants.blockchain.vm) {
+        started();
+        return cb();
+      }
       const requestManager = new Web3RequestManager.Manager(blockchainConfig.endpoint);
 
       const ogConsoleError = console.error;
@@ -37,21 +48,52 @@ class Blockchain {
         console.error = ogConsoleError;
         if (!err) {
           // Node is already started
-          this.events.emit("blockchain:started");
+          started();
           return cb(null, true);
         }
-        const clientName = blockchainConfig.client;
+        const clientFunctions = this.blockchainNodes[clientName];
-        const client = this.blockchainNodes[clientName];
+        if (!clientFunctions) {
-        if (!client) return cb("client " + clientName + " not found");
+          return cb(__("Client %s not found", clientName));
+        }
 
         let onStart = () => {
-          this.events.emit("blockchain:started", clientName);
+          started();
           cb();
         };
 
-        client.apply(client, [onStart]);
+        this.startedClient = clientName;
+        clientFunctions.launchFn.apply(clientFunctions, [onStart]);
       });
     });
+
+    this.events.setCommandHandler("blockchain:node:stop", (clientName, cb) => {
+      if (typeof clientName === 'function') {
+        if (!this.startedClient) {
+          return cb(__('No blockchain client is currently started'));
+        }
+        cb = clientName;
+        clientName = this.startedClient;
+      }
+
+      if (clientName === constants.blockchain.vm) {
+        this.startedClient = null;
+        this.events.emit("blockchain:stopped", clientName);
+        return cb();
+      }
+
+      const clientFunctions = this.blockchainNodes[clientName];
+      if (!clientFunctions) {
+        return cb(__("Client %s not found", clientName));
+      }
+
+      clientFunctions.stopFn.apply(clientFunctions, [
+        () => {
+          this.events.emit("blockchain:stopped", clientName);
+          cb();
+        }
+      ]);
+      this.startedClient = null;
+    });
     this.blockchainApi.registerAPIs("ethereum");
     this.blockchainApi.registerRequests("ethereum");
   }

packages/embark/src/lib/modules/ethereum-blockchain-client/index.js

@@ -29,6 +29,10 @@ class EthereumBlockchainClient {
     this.events.request("blockchain:client:register", "ethereum", this.getClient.bind(this));
     this.events.request("deployment:deployer:register", "ethereum", this.deployer.bind(this));
 
+    this.events.on("blockchain:started", () => {
+      this._web3 = null;
+    });
+
     this.registerAPIRequests();
   }
 
@@ -54,23 +58,18 @@ class EthereumBlockchainClient {
 
   async deployer(contract, done) {
     const web3 = await this.web3;
-    // var web3 = new Web3("ws://localhost:8556")
+    const [account] = await web3.eth.getAccounts();
-    // web3.eth.getAccounts().then((accounts) => {
+    const contractObj = new web3.eth.Contract(contract.abiDefinition, contract.address);
-    let accounts = await web3.eth.getAccounts();
+    const contractObject = contractObj.deploy({arguments: (contract.args || []), data: ("0x" + contract.code)});
-    let account = accounts[0];
-    // let contractObject = this.blockchain.ContractObject({abi: contract.abiDefinition});
-    let contractObj = new web3.eth.Contract(contract.abiDefinition, contract.address);
-    // let deployObject = this.blockchain.deployContractObject(contractObject, {arguments: contractParams, data: dataCode});
-    let contractObject = contractObj.deploy({arguments: (contract.args || []), data: ("0x" + contract.code)});
 
     if (contract.gas === 'auto' || !contract.gas) {
-      let gasValue = await contractObject.estimateGas();
+      const gasValue = await contractObject.estimateGas();
-      let increase_per = 1 + (Math.random() / 10.0);
+      const increase_per = 1 + (Math.random() / 10.0);
       contract.gas = Math.floor(gasValue * increase_per);
     }
 
     if (!contract.gasPrice) {
-      let gasPrice = await web3.eth.getGasPrice();
+      const gasPrice = await web3.eth.getGasPrice();
       contract.gasPrice = contract.gasPrice || gasPrice;
     }
 
@@ -198,8 +197,7 @@ class EthereumBlockchainClient {
   }
 
   async determineAccounts(params, callback) {
-    let provider = await this.events.request2("blockchain:client:provider", "ethereum");
+    const web3 = await this.web3;
-    let web3 = new Web3(provider);
     let accounts = await web3.eth.getAccounts();
     let deploymentAccount = accounts[0];
     let contract = params.contract;

packages/embark/src/lib/modules/ganache/index.js

@@ -0,0 +1,10 @@
+class Ganache {
+  constructor(embark) {
+    embark.events.request('proxy:vm:register', () => {
+      const ganache = require('ganache-cli');
+      return ganache.provider();
+    });
+  }
+}
+
+module.exports = Ganache;

packages/embark/src/lib/modules/geth/index.js

@@ -6,7 +6,6 @@ import {ws, rpc} from './check.js';
 const constants = require('embark-core/constants');
 
 class Geth {
-
   constructor(embark, options) {
     this.embark = embark;
     this.embarkConfig = embark.config.embarkConfig;
@@ -23,7 +22,8 @@ class Geth {
       return;
     }
 
-    this.events.request("blockchain:node:register", constants.blockchain.clients.geth, (readyCb) => {
+    this.events.request("blockchain:node:register", constants.blockchain.clients.geth, {
+      launchFn: (readyCb) => {
         this.events.request('processes:register', 'blockchain', {
           launchFn: (cb) => {
             this.startBlockchainNode(cb);
@@ -39,6 +39,11 @@ class Geth {
           readyCb();
         });
         this.registerServiceCheck();
+      },
+      stopFn: async (cb) => {
+        await this.events.request("processes:stop", "blockchain");
+        cb();
+      }
     });
 
     this.events.request("whisper:node:register", constants.blockchain.clients.geth, readyCb => {

packages/plugins/accounts-manager/src/index.ts

@@ -34,6 +34,10 @@ export default class AccountsManager {
     this.embark.registerActionForEvent("blockchain:proxy:request", this.checkBlockchainRequest.bind(this));
     this.embark.registerActionForEvent("blockchain:proxy:response", this.checkBlockchainResponse.bind(this));
 
+    this.events.on("blockchain:started", () => {
+      this._web3 = null;
+    });
+
     // Allow to run transaction in parallel by resolving the nonce manually.
     // For each transaction, resolve the nonce by taking the max of current transaction count and the cache we keep locally.
     // Update the nonce and sign it

packages/plugins/deploy-tracker/src/deploymentChecks.js

@@ -9,6 +9,10 @@ export default class DeploymentChecks {
     this.events = events;
     this.logger = logger;
     this._web3 = null;
+
+    this.events.on("blockchain:started", () => {
+      this._web3 = null;
+    });
   }
 
   get web3() {

packages/plugins/deploy-tracker/src/trackingFunctions.js

@@ -17,6 +17,10 @@ export default class TrackingFunctions {
     this._block = null;
 
     this.ensureChainTrackerFile();
+
+    this.events.on("blockchain:started", () => {
+      this._web3 = null;
+    });
   }
 
   get web3() {

packages/plugins/ens/src/index.js

@@ -84,6 +84,10 @@ class ENS {
       setImmediate(cb, this.isENSName(name));
     });
 
+    this.events.on("blockchain:started", () => {
+      this._web3 = null;
+    });
+
     this.init(() => {});
   }
 

packages/plugins/mocha-tests/package.json

@@ -47,6 +47,14 @@
     },
     "extends": "../../../.eslintrc.json"
   },
+  "dependencies": {
+    "@babel/runtime-corejs2": "7.3.1",
+    "async": "3.1.0",
+    "embark-i18n": "^4.1.1",
+    "embark-utils": "^4.1.1",
+    "mocha": "6.2.0",
+    "web3": "1.2.1"
+  },
   "devDependencies": {
     "@babel/cli": "7.2.3",
     "@babel/core": "7.2.2",
@@ -60,12 +68,7 @@
     "tslint": "5.16.0",
     "typescript": "3.4.5"
   },
-  "dependencies": {
-    "async": "2.6.1",
     "embarkjs": "^4.1.1",
-    "mocha": "6.2.0",
-    "web3": "1.2.1"
-  },
   "engines": {
     "node": ">=8.12.0 <12.0.0",
     "npm": ">=6.4.1",

packages/plugins/mocha-tests/src/lib/index.js

@@ -1,3 +1,5 @@
+import {__} from 'embark-i18n';
+
 const assert = require('assert').strict;
 const async = require('async');
 const EmbarkJS = require('embarkjs');
@@ -14,8 +16,12 @@ class MochaTestRunner {
     this.embark = embark;
     this.events = embark.events;
     this.plugins = options.plugins;
+    this.logger = embark.logger;
+    this.fs = embark.fs;
 
     this.files = [];
+    this.options = {};
+    this.web3 = null;
 
     this.events.request('tests:runner:register',
       'JavaScript (Mocha)',
@@ -37,20 +43,31 @@ class MochaTestRunner {
     return JAVASCRIPT_TEST_MATCH.test(path);
   }
 
-  run(options, cb) {
+  async run(options, cb) {
-    const {events, plugins} = this;
+    const {events} = this.embark;
     const {reporter} = options;
+    this.options = options;
 
     const Module = require("module");
     const originalRequire = require("module").prototype.require;
 
     let accounts = [];
     let compiledContracts = {};
-    let web3;
 
     const config = (cfg, acctCb) => {
       global.before((done) => {
         async.waterfall([
+          (next) => {
+            events.request("tests:deployment:check", cfg, this.options, (err, provider) => {
+              if (err) {
+                return next(err);
+              }
+              if (provider) {
+                this.web3.setProvider(provider);
+              }
+              next();
+            });
+          },
           (next) => {
             events.request("contracts:build", cfg, compiledContracts, next);
           },
@@ -86,6 +103,12 @@ class MochaTestRunner {
             }
 
             next();
+          },
+          (next) => {
+            this.web3.eth.getAccounts((err, accts) => {
+              accounts = accts;
+              next(err);
+            });
           }
         ], (err) => {
           // Reset the gas accumulator so that we don't show deployment gas on the
@@ -102,32 +125,37 @@ class MochaTestRunner {
       });
     };
 
+    const provider = await this.events.request2("tests:blockchain:start", this.options);
+    this.web3 = new Web3(provider);
+    accounts = await this.web3.eth.getAccounts();
+    await events.request2("contracts:reset");
+    let contractFiles = await events.request2("config:contractsFiles");
+
     async.waterfall([
-      (next) => { // request provider
+      (next) => {
-        events.request("blockchain:client:provider", "ethereum", next);
+        this.plugins.emitAndRunActionsForEvent('tests:contracts:compile:before', contractFiles, next);
       },
-      (provider, next) => { // set provider and fetch account list
+      (_contractFiles, next) => {
-        web3 = new Web3(provider);
+        contractFiles = _contractFiles;
-        web3.eth.getAccounts(next);
+        events.request("compiler:contracts:compile", _contractFiles, next);
       },
-      (accts, next) => { // reset contracts as we might have state leakage from other plugins
+      (_compiledContracts, next) => {
-        accounts = accts;
+        this.plugins.emitAndRunActionsForEvent('tests:contracts:compile:after', _compiledContracts, next);
-        events.request("contracts:reset", next);
       },
-      (next) => { // get contract files
+      (_compiledContracts, next) => {
-        events.request("config:contractsFiles", next);
+        compiledContracts = _compiledContracts;
-      },
+        const fns = this.files.map((file) => {
-      (cf, next) => {
+          return (seriesCb) => {
-        plugins.emitAndRunActionsForEvent('tests:contracts:compile:before', cf, next);
+
-      },
+            this.fs.readFile(file, (err, data) => {
-      (cf, next) => { // compile contracts
+              if (err) {
-        events.request("compiler:contracts:compile", cf, next);
+                self.logger.error(__('Error reading file %s', file));
-      },
+                self.logger.error(err);
-      (cc, next) => {
+                seriesCb(null, 1);
-        plugins.emitAndRunActionsForEvent('tests:contracts:compile:after', cc, next);
+              }
-      },
+              if (data.toString().search(/contract\(|describe\(/) === -1) {
-      (cc, next) => { // override require
+                return seriesCb(null, 0);
-        compiledContracts = cc;
+              }
 
               Module.prototype.require = function(req) {
                 const prefix = "Embark/contracts/";
@@ -141,15 +169,11 @@ class MochaTestRunner {
                 if (!instance) {
                   throw new Error(`Cannot find module '${req}'`);
                 }
-
                 return instance;
               };
-        next();
-      },
-      (next) => { // initialize Mocha
-        const mocha = new Mocha();
 
-        mocha.reporter(Reporter, { reporter: reporter });
+              const mocha = new Mocha();
+              mocha.reporter(Reporter, {reporter: options.reporter});
               const describeWithAccounts = (scenario, cb) => {
                 Mocha.describe(scenario, cb.bind(mocha, accounts));
               };
@@ -161,14 +185,19 @@ class MochaTestRunner {
                 global.config = config;
               });
 
-        mocha.suite.timeout(TEST_TIMEOUT);
-        for(const file of this.files) {
-          mocha.addFile(file);
-        }
 
-        mocha.run((_failures) => {
+              mocha.suite.timeout(TEST_TIMEOUT);
-          next();
+              mocha.addFile(file);
+
+              mocha.run((failures) => {
+                Module.prototype.require = originalRequire;
+                seriesCb(null, failures);
               });
+            });
+          };
+        });
+
+        async.series(fns, next);
       }
     ], (err) => {
       events.emit('tests:finished');

packages/plugins/transaction-tracker/src/index.js

@@ -10,6 +10,9 @@ class TransactionTracker {
     this._web3 = null;
 
     embark.events.on("block:header", this.onBlockHeader.bind(this));
+    this.events.on("blockchain:started", () => {
+      this._web3 = null;
+    });
     this.registerAPICalls();
     this.subscribeToPendingTransactions();
   }

packages/plugins/web3/src/index.js

@@ -40,11 +40,6 @@ class EmbarkWeb3 {
   }
 
   async registerWeb3Object() {
-    const checkWeb3 = `return (typeof web3 === 'undefined');`;
-    const web3NotDefined = await this.events.request2('runcode:eval', checkWeb3);
-
-    if (!web3NotDefined) return;
-
     const provider = await this.events.request2("blockchain:client:provider", "ethereum");
     const web3 = new Web3(provider);
     await this.events.request2("runcode:register", 'web3', web3);

packages/stack/contracts-manager/src/index.js

@@ -44,6 +44,10 @@ class ContractsManager {
       cb(null, this.contracts[contract.className]);
     });
 
+    this.events.on("blockchain:started", () => {
+      this._web3 = null;
+    });
+
     this.registerCommands();
     this.registerAPIs();
   }
@@ -262,6 +266,9 @@ class ContractsManager {
       function prepareContractsFromConfig(callback) {
         self.events.emit("status", __("Building..."));
 
+        if (contractsConfig.contracts.deploy) {
+          contractsConfig.contracts = contractsConfig.contracts.deploy;
+        }
         async.eachOf(contractsConfig.contracts, (contract, className, eachCb) => {
           contract = new Contract(self.logger, contract);
           if (!contract.artifact) {

packages/stack/deployment/src/contract_deployer.js

@@ -13,7 +13,6 @@ class ContractDeployer {
   }
 
   deployContract(contract, callback) {
-
     async.waterfall([
       (next) => {
         this.plugins.emitAndRunActionsForEvent('deployment:contract:beforeDeploy', {contract: contract}, (err, _params) => {
@@ -22,7 +21,6 @@ class ContractDeployer {
         });
       },
       (next) => {
-        // self.plugins.emitAndRunActionsForEvent('deployment:contract:arguments', {contract: contract}, (_params) => {
         this.plugins.emitAndRunActionsForEvent('deployment:contract:shouldDeploy', {contract: contract, shouldDeploy: true}, (err, params) => {
           next(err, params);
         });

packages/stack/proxy/src/index.ts

@@ -11,26 +11,29 @@ export default class ProxyManager {
   private proxy: any;
   private plugins: any;
   private readonly host: string;
-  private rpcPort: number;
+  private rpcPort = 0;
-  private wsPort: number;
+  private wsPort = 0;
-  private ready: boolean;
+  private ready = false;
   private isWs = false;
+  private vms: any[];
 
   constructor(private embark: Embark, options: any) {
     this.logger = embark.logger;
     this.events = embark.events;
     this.plugins = options.plugins;
-    this.ready = false;
+    this.vms = [];
-    this.rpcPort = 0;
-    this.wsPort = 0;
 
     this.host = "localhost";
 
-    this.events.once("blockchain:started", async () => {
+    this.events.on("blockchain:started", async (clientName: string) => {
-      await this.setupProxy();
+      await this.setupProxy(clientName);
       this.ready = true;
       this.events.emit("proxy:ready");
     });
+    this.events.on("blockchain:stopped", async (clientName: string, node?: string) => {
+      this.ready = false;
+      await this.stopProxy();
+    });
 
     if (!this.embark.config.blockchainConfig.proxy) {
       this.logger.warn(__("The proxy has been disabled -- some Embark features will not work."));
@@ -48,6 +51,10 @@ export default class ProxyManager {
       }
       cb(null, buildUrl("http", this.host, this.rpcPort, "rpc"));
     });
+
+    this.events.setCommandHandler("proxy:vm:register", (handler: any) => {
+      this.vms.push(handler);
+    });
   }
 
   public onReady() {
@@ -61,23 +68,31 @@ export default class ProxyManager {
     });
   }
 
-  private async setupProxy() {
+  private async setupProxy(clientName: string) {
     if (!this.embark.config.blockchainConfig.proxy) {
       return;
     }
+    if (this.proxy) {
+      throw new Error("Proxy is already started");
+    }
     const port = await findNextPort(this.embark.config.blockchainConfig.rpcPort + constants.blockchain.servicePortOnProxy);
 
     this.rpcPort = port;
     this.wsPort = port + 1;
-    this.isWs = (/wss?/).test(this.embark.config.blockchainConfig.endpoint);
+    this.isWs = clientName === constants.blockchain.vm || (/wss?/).test(this.embark.config.blockchainConfig.endpoint);
 
-    this.proxy = await new Proxy({events: this.events, plugins: this.plugins, logger: this.logger})
+    this.proxy = await new Proxy({events: this.events, plugins: this.plugins, logger: this.logger, vms: this.vms});
-      .serve(
+
-        this.embark.config.blockchainConfig.endpoint,
+    await this.proxy.serve(
+      clientName === constants.blockchain.vm ? constants.blockchain.vm : this.embark.config.blockchainConfig.endpoint,
       this.host,
       this.isWs ? this.wsPort : this.rpcPort,
       this.isWs,
     );
-    return;
+  }
+
+  private stopProxy() {
+    this.proxy.stop();
+    this.proxy = null;
   }
 }

packages/stack/proxy/src/proxy.js

@@ -4,6 +4,7 @@ import express from 'express';
 import expressWs from 'express-ws';
 import cors from 'cors';
 const Web3RequestManager = require('web3-core-requestmanager');
+const constants = require("embark-core/constants");
 
 const ACTION_TIMEOUT = 5000;
 
@@ -15,9 +16,15 @@ export class Proxy {
     this.timeouts = {};
     this.plugins = options.plugins;
     this.logger = options.logger;
+    this.vms = options.vms;
+    this.app = null;
+    this.server = null;
   }
 
   async serve(endpoint, localHost, localPort, ws) {
+    if (endpoint === constants.blockchain.vm) {
+      endpoint = this.vms[this.vms.length - 1]();
+    }
     const requestManager = new Web3RequestManager.Manager(endpoint);
 
     try {
@@ -26,17 +33,17 @@ export class Proxy {
       throw new Error(__('Unable to connect to the blockchain endpoint'));
     }
 
-    const app = express();
+    this.app = express();
     if (ws) {
-      expressWs(app);
+      expressWs(this.app);
     }
 
-    app.use(cors());
+    this.app.use(cors());
-    app.use(express.json());
+    this.app.use(express.json());
-    app.use(express.urlencoded({extended: true}));
+    this.app.use(express.urlencoded({extended: true}));
 
     if (ws) {
-      app.ws('/', (ws, _wsReq) => {
+      this.app.ws('/', (ws, _wsReq) => {
         ws.on('message', (msg) => {
           let jsonMsg;
           try {
@@ -50,7 +57,7 @@ export class Proxy {
             // Send the possibly modified request to the Node
             requestManager.send(resp.reqData, (err, result) => {
               if (err) {
-                return this.logger.error(__('Error executing the request on the Node'), JSON.stringify(err));
+                return this.logger.error(__('Error executing the request on the Node'), err.message || err);
               }
               this.emitActionsForResponse(resp.reqData, {jsonrpc: "2.0", id: resp.reqData.id, result}, (_err, resp) => {
                 // Send back to the caller (web3)
@@ -62,7 +69,7 @@ export class Proxy {
       });
     } else {
       // HTTP
-      app.use((req, res) => {
+      this.app.use((req, res) => {
         // Modify request
         this.emitActionsForRequest(req.body, (_err, resp) => {
           // Send the possibly modified request to the Node
@@ -80,9 +87,9 @@ export class Proxy {
     }
 
     return new Promise(resolve => {
-      app.listen(localPort, localHost, null,
+      this.server = this.app.listen(localPort, localHost, null,
         () => {
-          resolve(app);
+          resolve(this.app);
         });
     });
   }
@@ -147,4 +154,17 @@ export class Proxy {
         calledBack = true;
       });
   }
+
+  stop() {
+    if (!this.server) {
+      return;
+    }
+    this.server.close();
+    this.server = null;
+    this.app = null;
+    this.commList = {};
+    this.receipts = {};
+    this.transactions = {};
+    this.timeouts = {};
+  }
 }

packages/stack/test-runner/src/lib/index.js

@@ -1,9 +1,12 @@
 import { __ } from 'embark-i18n';
+import {buildUrl, deconstructUrl, recursiveMerge} from "embark-utils";
 const async = require('async');
 const chalk = require('chalk');
 const path = require('path');
 const { dappPath } = require('embark-utils');
+import cloneDeep from "lodash.clonedeep";
 import { COVERAGE_GAS_LIMIT, GAS_LIMIT } from './constants';
+const constants = require('embark-core/constants');
 
 const coverage = require('istanbul-lib-coverage');
 const reporter = require('istanbul-lib-report');
@@ -22,6 +25,10 @@ class TestRunner {
     this.gasLimit = options.coverage ? COVERAGE_GAS_LIMIT : GAS_LIMIT;
     this.files = [];
 
+    this.configObj = embark.config;
+    this.originalConfigObj = cloneDeep(embark.config);
+    this.simOptions = {};
+
     this.events.setCommandHandler('tests:run', (options, callback) => {
       this.run(options, callback);
     });
@@ -32,6 +39,9 @@ class TestRunner {
       // like Jest tests and such.
       this.runners.unshift({pluginName, matchFn, addFn, runFn});
     });
+
+    this.events.setCommandHandler('tests:deployment:check', this.checkDeploymentOptions.bind(this));
+    this.events.setCommandHandler('tests:blockchain:start', this.startBlockchainNode.bind(this));
   }
 
   run(options, cb) {
@@ -65,7 +75,7 @@ class TestRunner {
         });
 
         async.series(runnerFns, next);
-      },
+      }
     ], (err) => {
       reporter.footer();
 
@@ -85,16 +95,16 @@ class TestRunner {
         open(dappPath('coverage/index.html')).then(() => {
           cb(err, reporter.passes, reporter.fails);
         });
-      } catch(err) {
+      } catch(e) {
-        process.stdout.write(chalk`{red Coverage report could not be created:}\n{white ${err.message}}\n`);
+        process.stdout.write(chalk`{red Coverage report could not be created:}\n{white ${e.message}}\n`);
-        cb(err, reporter.passes, reporter.fails);
+        cb(e, reporter.passes, reporter.fails);
       }
     });
   }
 
   generateCoverageReport() {
     const coveragePath = dappPath(".embark", "coverage.json");
-    const coverageMap = JSON.parse(fs.readFileSync(coveragePath));
+    const coverageMap = JSON.parse(this.fs.readFileSync(coveragePath));
     const map = coverage.createCoverageMap(coverageMap);
     const tree = reporter.summarizers.nested(map);
 
@@ -131,6 +141,77 @@ class TestRunner {
       cb(null, [filePath]);
     });
   }
+
+  async checkDeploymentOptions(config, options, cb = () => {}) {
+    let resetServices = false;
+    const blockchainConfig = config.blockchain || {};
+    let {host, port, type, protocol} = blockchainConfig.endpoint ? deconstructUrl(blockchainConfig.endpoint) : {};
+    const accounts = blockchainConfig.accounts;
+
+    if (host && port && !['rpc', 'ws'].includes(type)) {
+      return cb(__("contracts config error: unknown deployment type %s", type));
+    }
+
+    if (!type) {
+      type = constants.blockchain.vm;
+    }
+
+    if (accounts || port !== this.simOptions.port || type !== this.simOptions.type || host !== this.simOptions.host) {
+      resetServices = true;
+    }
+
+    Object.assign(this.simOptions, {host, port, type, protocol, accounts, client: config.blockchain && config.blockchain.client});
+
+    if (!resetServices) {
+      return cb();
+    }
+
+    const provider = await this.startBlockchainNode(options);
+    cb(null, provider);
+    return provider;
+  }
+
+  async startBlockchainNode(options, cb = () => {}) {
+    let node = options.node;
+    if (!this.simOptions.host && (node && node === constants.blockchain.vm)) {
+      this.simOptions.type = constants.blockchain.vm;
+      this.simOptions.client = constants.blockchain.vm;
+    } else if (this.simOptions.host || (node && node !== constants.blockchain.vm)) {
+      let options = this.simOptions;
+      if (node && node !== constants.blockchain.vm) {
+        options = deconstructUrl(node);
+      }
+
+      if (!options.protocol) {
+        options.protocol = (options.type === "rpc") ? 'http' : 'ws';
+      }
+      Object.assign(this.simOptions, options);
+      node = null;
+    }
+
+    this.configObj.blockchainConfig = recursiveMerge({}, this.originalConfigObj.blockchainConfig, {
+      endpoint: this.simOptions.host ? buildUrl(this.simOptions.protocol, this.simOptions.host, this.simOptions.port, this.simOptions.type) : null,
+      type: this.simOptions.type,
+      accounts: this.simOptions.accounts,
+      coverage: options.coverage
+    });
+    if (this.simOptions.client) {
+      this.configObj.blockchainConfig.client = this.simOptions.client;
+    }
+    this.logger.trace('Setting blockchain configs:', this.configObj.blockchainConfig);
+    await this.events.request2('config:blockchainConfig:set', this.configObj.blockchainConfig);
+
+    try {
+      await this.events.request2("blockchain:node:stop");
+    } catch (e) {
+      // Nothing to do here, the node probably wasn't even started
+    }
+
+    await this.events.request2("blockchain:node:start", this.configObj.blockchainConfig);
+    const provider = await this.events.request2("blockchain:client:provider", "ethereum");
+    cb(null, provider);
+    return provider;
+  }
 }
 
 module.exports = TestRunner;