change behaviour of tests and browser testing/build

lib/6to5/browser.js

@@ -1,3 +1,6 @@
-var transform = require("./transform");
+Error.captureStackTrace = Error.captureStackTrace || function (obj) {
+  obj.stack = [{ toString: null }];
+};
 
-module.exports = transform;
+exports.generate  = require("./generator");
+exports.transform = require("./transform");

lib/6to5/transform.js

@@ -1,10 +1,11 @@
 module.exports = transform;
 
 var Transformer = require("./transformer");
-var sourceMap   = require("source-map");
 var generate    = require("./generator");
+var assert      = require("assert");
 var File        = require("./file");
 var util        = require("./util");
+var chai        = require("chai");
 var _           = require("lodash");
 
 function transform(code, opts) {
@@ -15,66 +16,6 @@ function transform(code, opts) {
   return file.parse(code);
 }
 
-transform.test = function (task, assert) {
-  var actual = task.actual;
-  var expect = task.expect;
-  var opts   = task.options;
-  var exec   = task.exec;
-
-  var getOpts = function (filename) {
-    return _.merge({
-      whtiespace: true,
-      filename: filename
-    }, opts);
-  };
-
-  var execCode = exec.code.trim();
-  var result;
-
-  if (execCode) {
-    result = transform(execCode, getOpts(exec.filename));
-    execCode = result.code;
-
-    require("./polyfill");
-
-    try {
-      var fn = new Function("assert", execCode);
-      fn(assert);
-    } catch (err) {
-      err.message += util.codeFrame(execCode);
-      throw err;
-    }
-  } else {
-    var actualCode = actual.code.trim();
-    var expectCode = expect.code.trim();
-
-    result     = transform(actualCode, getOpts(actual.filename));
-    actualCode = result.code;
-
-    try {
-      assert.equal(actualCode, expectCode);
-    } catch (err) {
-      err.showDiff = true;
-      throw err;
-    }
-  }
-
-  if (task.sourceMap) {
-    assert.deepEqual(task.sourceMap, result.map);
-  }
-
-  if (task.sourceMappings) {
-    var consumer = new sourceMap.SourceMapConsumer(result.map);
-
-    _.each(task.sourceMappings, function (mapping, i) {
-      var expect = mapping.original;
-
-      var actual = consumer.originalPositionFor(mapping.generated);
-      assert.equal(actual.line + ":" + actual.column, expect.line + ":" + expect.column);
-    });
-  }
-};
-
 transform._ensureTransformerNames = function (type, keys) {
   _.each(keys, function (key) {
     if (!_.has(transform.transformers, key)) {