Exclude APIs required only for tests from main bundle (#288)

lib/transform.js

@@ -89,7 +89,7 @@ import {
     noop,
 } from "./utils.js";
 
-(function(undefined) {
+(function() {
 
     function _(node, descend) {
         node.DEFMETHOD("transform", function(tw, in_list) {

main.js

@@ -23,6 +23,7 @@ export {
 } from "./lib/utils.js";
 export { base54 } from "./lib/scope.js";
 export { Compressor } from "./lib/compress/index.js";
+export { to_ascii } from "./lib/minify.js";
 export { OutputStream } from "./lib/output.js";
 export { parse }  from "./lib/parse.js";
 export {
@@ -31,11 +32,3 @@ export {
 } from "./lib/propmangle.js";
 export { default_options } from "./tools/node";
 import "./lib/mozilla-ast.js";
-
-// TESTS
-export * from "./lib/ast.js";
-export {
-    JS_Parse_Error,
-    tokenizer,
-} from "./lib/parse.js";
-export { to_ascii } from "./lib/minify.js";

main.tests.js

@@ -0,0 +1,9 @@
+// Core
+export * from "./main";
+
+// TESTS
+export * from "./lib/ast.js";
+export {
+    JS_Parse_Error,
+    tokenizer,
+} from "./lib/parse.js";

package.json

@@ -33,7 +33,6 @@
   },
   "devDependencies": {
     "acorn": "^6.0.4",
-    "cross-env": "^5.2.0",
     "csv": "^5.1.0",
     "escodegen": "^1.11.0",
     "eslint": "^4.19.1",
@@ -46,10 +45,12 @@
     "semver": "~5.6.0"
   },
   "scripts": {
-    "test": "npm run prepare --silent && istanbul instrument dist/bundle.min.js > dist/bundle.instrumented.js && node test/run-tests.js",
+    "test": "npm run build -- --silent --input=main.tests.js && npm run minify && node test/run-tests.js",
     "lint": "eslint lib",
     "lint-fix": "eslint --fix lib",
-    "prepare": "rimraf dist/* && rollup -c && cd dist && cross-env TERSER_NO_BUNDLE=1 ../bin/uglifyjs bundle.js -mc --source-map 'content=bundle.js.map,includeSources=true,url=bundle.min.js.map' -o bundle.min.js",
+    "build": "rimraf dist/* && rollup -c",
+    "minify": "cd dist && node ../bin/uglifyjsnobundle bundle.js -mc --source-map content=bundle.js.map,includeSources=true -o bundle.min.js",
+    "prepare": "npm run build && npm run minify",
     "postversion": "echo 'Remember to update the changelog!'"
   },
   "keywords": [