Coverage reports now accurately reflect source

Aka the previous coverage reports over the transpiled js (from ts) now
have sourcemaps applied to them so that the coverage reports are now
over ts.

Also made coverage reports be automatically written as the tests are
run.

bin/browser-sync-test.js

@@ -0,0 +1,44 @@
+#!/usr/bin/env node
+
+var bs = require('browser-sync').create();
+var fs = require('fs');
+var path = require('path');
+var remap = require('remap-istanbul/lib/remap');
+var writeReport = require('remap-istanbul/lib/writeReport');
+
+bs.init({
+    server: {
+        directory: true
+    },
+    startPath: '../index.html',
+    files: '../src/**'
+}, function() {
+    bs.sockets.on('connection', function(client) {
+        client.on('argon:coverage', function(data) {
+            var coverage = data.coverage;
+            var sourceMaps = data.sourceMaps;
+            var sourceJs = data.sourceJs;
+
+            var collector = remap(coverage, {
+                readFile: function(fileName) {
+                    if (sourceJs[fileName]) {
+                        return new Buffer(sourceJs[fileName]);
+                    } else {
+                        throw new Error('No such js file "' + fileName + '".');
+                    }
+                },
+                readJSON: function(fileName) {
+                    if (sourceMaps[fileName]) {
+                        return sourceMaps[fileName];
+                    } else {
+                        throw new Error('No such source map "' + fileName + '".');
+                    }
+                }
+            });
+
+            writeReport(collector, 'html', path.join(__dirname, '../coverage')).then(function() {
+                console.log('Wrote new coverage report to "' + path.join(__dirname, '../coverage/index.html') + '".');
+            });
+        });
+    });
+});

index.html

@@ -8,5 +8,6 @@
   }
 </style>
 <h3><a href="/test/index.html" onclick="window.open('/test/index.html', 'Test Runner', 'width=550, height=800'); return false;">Test Runner</a></h3>
+<h3><a href="/coverage/index.html">Code Coverage</a></h3>
 <h3><a href="/">Documentation</a></h3>
 <h3><a href="/example/">Example</a></h3>

jspm.config.js

@@ -8,7 +8,7 @@ SystemJS.config({
     typescriptOptions: {
         "tsconfig": true,
         "typeCheck": false,
-        "sourceMap": false
+        "sourceMap": true
     },
 
     meta: {

package.json

@@ -109,6 +109,7 @@
   "devDependencies": {
     "browser-sync": "^2.11.0",
     "jspm": "^0.17.0-beta.9",
+    "remap-istanbul": "^0.5.1",
     "tsconfig-glob": "^0.2.1",
     "typedoc": "^0.3.12",
     "typescript": "^1.9.0-dev.20160226",
@@ -118,8 +119,7 @@
     "tsconfig": "tsconfig .",
     "format": "tsfmt -r",
     "build": "jspm build src/argon.ts dist/argon.js --format umd --global-name Argon --skip-source-maps",
-    "browser-sync": "browser-sync  start --server --directory --startPath \"index.html\" --files \"src/**\"",
-    "test": "npm run browser-sync",
+    "test": "node bin/browser-sync-test.js",
     "typedoc": "typedoc --out docs --gaID UA-63191442-2 --name argon.js --readme README.md --target ES5 --module commonjs --experimentalDecorators --excludeNotExported --excludeExternals src/argon.ts src/context.ts src/device.ts src/reality.ts src/view.ts src/session.ts src/timer.ts src/utils.ts src/vuforia.ts src/definitions jspm_packages/github/aurelia/dependency-injection@0.12.1/aurelia-dependency-injection.d.ts jspm_packages/github/aurelia/logging@0.9.0/aurelia-logging.d.ts jspm_packages/github/aurelia/metadata@0.10.1/aurelia-metadata.d.ts jspm_packages/github/aurelia/pal@0.3.0/aurelia-pal.d.ts typings/browser.d.ts"
   }
 }

test/index.html

@@ -10,6 +10,10 @@
     <div id="mocha"></div>
     <script>
         System.import('istanbul/lib/instrumenter.js').then(function(Instrumenter) {
+            // A map from argon source file names to their source maps
+            var sourceMaps = {};
+            // A map from argon source file names to their transpiled js
+            var sourceJs = {};
 
             // Override the systemjs translate function so that our typescript
             // is instrumented by istanbul for code coverage.
@@ -27,9 +31,17 @@
                     var fileNameStart = load.address.indexOf('src/');
                     fileNameStart = fileNameStart === -1 ? load.address.indexOf('test/') : fileNameStart;
                     var fileName = load.address.substring(fileNameStart);
+                    fileName = fileName.slice(0, -3);
+                    var baseFileName = fileName.slice(fileName.lastIndexOf('/') + 1);
 
                     result = result.then(function(code) {
-                        load.source = new Instrumenter({embedSource:true}).instrumentSync(code, fileName);
+                        var codeWithSourceMapComment = '//# sourceMappingURL=' + baseFileName + '.js.map\n' + code;
+
+                        sourceJs[fileName + '.js'] = codeWithSourceMapComment;
+                        sourceMaps[fileName + '.js.map'] = load.metadata.sourceMap;
+                        sourceMaps[fileName + '.js.map'].sources = [baseFileName + '.ts'];
+
+                        load.source = new Instrumenter().instrumentSync(codeWithSourceMapComment, fileName + '.js');
 
                         // TODO: should also update load.sourceMap
                         return load.source;
@@ -47,14 +59,11 @@
                 System.import('test/test.ts!').then(function() {
                     mocha.checkLeaks();
                     mocha.run(function() {
-                        // Prompt the user to copy the code coverage data to the
-                        // clipboard.
-                        //
-                        // TODO: it would be better to automatically create the
-                        // file with the browser file api (chrome only) or with web
-                        // sockets (to pass this back to the server where it can
-                        // write the file to disk).
-                        window.prompt("The code coverage data:", JSON.stringify(window.__coverage__));
+                        window.___browserSync___.socket.emit('argon:coverage', {
+                            coverage: window.__coverage__,
+                            sourceMaps: sourceMaps,
+                            sourceJs: sourceJs
+                        });
                     });
                 });
             });