refactor: wire up coverage

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

@@ -76,6 +76,7 @@ class MochaTestRunner {
             acctCb(err, accounts);
           }
 
+          events.emit('tests:ready', accounts);
           done();
         });
       });
@@ -103,7 +104,13 @@ class MochaTestRunner {
         events.request("contracts:reset", next);
       },
       (next) => { // get contract files
-        events.request("config:contractsFiles", next);
+        if (!options.coverage) {
+          return events.request("config:contractsFiles", next);
+        }
+
+        events.request("coverage:prepareContracts", () => {
+          events.request("config:contractsFiles", next);
+        });
       },
       (cf, next) => { // compile contracts
         events.request("compiler:contracts:compile", cf, next);
@@ -149,12 +156,14 @@ class MochaTestRunner {
         }
 
         mocha.run((failures) => {
-          next(null, failures);
+          next();
         });
       }
-    ], (err, failures) => {
+    ], (err) => {
+      events.emit('tests:finished');
+
       Module.prototype.require = originalRequire;
-      cb(err, failures);
+      cb(err);
     });
   }
 }

packages/embark-test-runner/package.json

@@ -52,6 +52,7 @@
     "embark-i18n": "^4.1.1",
     "embark-utils": "^4.1.1",
     "fs-extra": "7.0.1",
+    "istanbul": "0.4.5",
     "mocha": "6.2.0",
     "open": "6.4.0"
   },

packages/embark-test-runner/src/index.js

@@ -1,6 +1,8 @@
 import { __ } from 'embark-i18n';
 const async = require('async');
+const chalk = require('chalk');
 const path = require('path');
+const { embarkPath, dappPath, runCmd } = require('embark-utils');
 import fs from 'fs';
 import { COVERAGE_GAS_LIMIT, GAS_LIMIT } from './constants';
 
@@ -60,10 +62,32 @@ class TestRunner {
         });
 
         async.series(runnerFns, next);
-      }
+      },
+      (_results, next) => {
+        if (!options.coverage) {
+          return next();
+        }
+
+        const cmd = `${embarkPath('node_modules/.bin/istanbul')} report --root .embark --format html --format lcov`;
+        runCmd(cmd, {silent: false, exitOnError: false}, next);
+      },
     ], (err) => {
       reporter.footer();
-      cb(err, reporter.passes, reporter.fails);
+
+      if (!options.coverage) {
+        return cb(err, reporter.passes, reporter.fails);
+      }
+
+      process.stdout.write(chalk`{blue Coverage report created. You can find it here:}\n{white.underline ${dappPath('coverage/index.html')}}\n`);
+
+      if (options.noBrowser) {
+        return cb(err, reporter.passes, reporter.fails);
+      }
+
+      const open = require('open');
+      open(dappPath('coverage/index.html')).then(() => {
+        cb(err, reporter.passes, reporter.fails);
+      });
     });
   }
 

packages/embark-test-runner/src/reporter.js

@@ -36,9 +36,9 @@ class Reporter {
   footer() {
     const total = this.passes + this.fails;
     if (this.fails > 0) {
-      process.stdout.write(`>>> Failed ${this.fails} / ${total} test(s).\n`);
+      process.stdout.write(chalk`{red Failed ${this.fails} / ${total} test(s).}\n`);
     } else {
-      process.stdout.write(`>>> Passed ${this.passes} test(s).\n`);
+      process.stdout.write(chalk`{green Passed ${this.passes} test(s).}\n`);
 
     }
   }

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

@@ -190,6 +190,7 @@ class Engine {
 
   testComponents() {
     this.registerModulePackage('embark-test-runner');
+    this.registerModulePackage('embark-coverage');
     this.registerModulePackage('embark-solidity-tests');
     this.registerModulePackage('embark-mocha-tests');
   }