Updates

lib/babel-assertion-visitor.js

@@ -5,7 +5,6 @@ var estraverse = require('estraverse');
 var cloneWithWhitelist = require('espurify').cloneWithWhitelist;
 var babelParser = require('@babel/parser');
 var babelgen = require('@babel/generator');
-var assign = require('core-js/library/fn/object/assign');
 var define = require('./define-properties');
 var toBeCaptured = require('./to-be-captured');
 var toBeSkipped = require('./to-be-skipped');
@@ -163,7 +162,7 @@ BabelAssertionVisitor.prototype.parseCanonicalCode = function (file, code) {
 
     function doParse(wrapper) {
         var content = wrapper ? wrapper(code) : code;
-        var output = babelParser.parse(content, assign({}, file.opts.parserOpts, {tokens: true}));
+        var output = babelParser.parse(content, Object.assign({}, file.opts.parserOpts, {tokens: true}));
         if (wrapper) {
             ast = output.program.body[0].body;
             tokens = output.tokens.slice(6, -2);

lib/babel-espower-visitor.js

@@ -2,9 +2,6 @@
 
 var CallMatcher = require('call-matcher');
 var babelParser = require('@babel/parser');
-var assign = require('core-js/library/fn/object/assign');
-var find = require('core-js/library/fn/array/find');
-var some = require('core-js/library/fn/array/some');
 var BabelAssertionVisitor = require('./babel-assertion-visitor');
 var isSpreadElement = function (node) {
     return node.type === 'SpreadElement';
@@ -36,15 +33,15 @@ BabelEspowerVisitor.prototype.enter = function (nodePath) {
             assertionVisitor.enterArgument(nodePath);
         }
     } else if (nodePath.isCallExpression()) {
-        var matcher = find(this.matchers, function (m) { return m.test(currentNode); });
+        var matcher = this.matchers.find(function (m) { return m.test(currentNode); });
         if (matcher) {
             // skip modifying argument if SpreadElement appears immediately beneath assert
-            if (some(currentNode.arguments, isSpreadElement)) {
+            if (currentNode.arguments.some(isSpreadElement)) {
                 nodePath.skip();
                 return;
             }
             // entering assertion
-            var espowerOptions = assign({
+            var espowerOptions = Object.assign({
                 path: file.opts.filename, // or opts.sourceFileName?
                 sourceMap: file.inputMap ? file.inputMap.toObject() : false
             }, this.options);

lib/create-espower-visitor.js

@@ -1,14 +1,13 @@
 'use strict';
 
 var defaultOptions = require('./default-options');
-var assign = require('core-js/library/fn/object/assign');
 var BabelEspowerVisitor = require('./babel-espower-visitor');
 
 module.exports = function createEspowerVisitor (babel, options) {
     return {
         visitor: {
             Program: function (path) {
-                var opts = assign(defaultOptions(), {
+                var opts = Object.assign(defaultOptions(), {
                     astWhiteList: babel.types.BUILDER_KEYS,
                     visitorKeys: babel.types.VISITOR_KEYS,
                     sourceRoot: process.cwd()

package.json

@@ -17,17 +17,16 @@
   "dependencies": {
     "@babel/generator": "^7.0.0",
     "@babel/parser": "^7.0.0",
-    "call-matcher": "^1.0.0",
-    "core-js": "^2.0.0",
-    "espower-location-detector": "^1.0.0",
-    "espurify": "^1.6.0",
+    "call-matcher": "^2.0.0",
+    "espower-location-detector": "^2.0.0",
+    "espurify": "^2.0.1",
     "estraverse": "^4.1.1"
   },
   "devDependencies": {
     "@babel/core": "^7.0.0",
     "@babel/preset-env": "^7.0.0",
     "@babel/preset-react": "^7.0.0",
-    "mocha": "^5.0.0"
+    "mocha": "^6.1.1"
   },
   "directories": {
     "lib": "./lib",

test/fixtures-with-presets-test.js

@@ -2,7 +2,6 @@ var assert = require('assert');
 var fs = require('fs');
 var path = require('path');
 var babel = require('@babel/core');
-var assign = require('core-js/library/fn/object/assign');
 var createEspowerPlugin = require('../create');
 
 function testTransform (fixtureName, extraSuffix, extraOptions) {
@@ -11,7 +10,7 @@ function testTransform (fixtureName, extraSuffix, extraOptions) {
         var fixtureFilepath = path.resolve(__dirname, 'fixtures', fixtureName, 'fixture.js');
         var expectedFilepath = path.resolve(__dirname, 'fixtures', fixtureName, 'expected' + suffix + '.js');
         var actualFilepath = path.resolve(__dirname, 'fixtures', fixtureName, 'actual' + suffix + '.js');
-        var result = babel.transformFileSync(fixtureFilepath, assign({
+        var result = babel.transformFileSync(fixtureFilepath, Object.assign({
             presets: [
                 '@babel/env',
                 '@babel/react'

test/test.js

@@ -2,15 +2,14 @@ var assert = require('assert');
 var fs = require('fs');
 var path = require('path');
 var babel = require('@babel/core');
-var assign = require('core-js/library/fn/object/assign');
 var createEspowerPlugin = require('../create');
 
 function testTransform (fixtureName, extraOptions) {
     it(fixtureName, function () {
         var fixtureFilepath = path.resolve(__dirname, 'fixtures', fixtureName, 'fixture.js');
         var expectedFilepath = path.resolve(__dirname, 'fixtures', fixtureName, 'expected.js');
         var actualFilepath = path.resolve(__dirname, 'fixtures', fixtureName, 'actual.js');
-        var result = babel.transformFileSync(fixtureFilepath, assign({
+        var result = babel.transformFileSync(fixtureFilepath, Object.assign({
             plugins: [
                 createEspowerPlugin(babel, {
                     embedAst: false