Merge pull request #118 from jhnns/pr/origin/117

Enable const support

13 files changed, 642 insertions, 18 deletions

diff --git a/.travis.yml b/.travis.yml
index 929d5ed..5f98a89 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,9 +1,9 @@
 language: node_js
 node_js:
-  - "0.10"
-  - "0.12"
   - "4"
-  - "5"
+  - "6"
+  - "8"
+  - "9"
 
 script:
   - npm test
diff --git a/README.md b/README.md
index da42d46..108c7a9 100644
--- a/README.md
+++ b/README.md
@@ -139,9 +139,6 @@ myModule.__with__({
 Limitations
 -----------
 
-**Using `const`**<br>
-It's not possible to rewire `const` (see [#79](https://github.com/jhnns/rewire/issues/79)). This can probably be solved with [proxies](https://developer.mozilla.org/en/docs/Web/JavaScript/Reference/Global_Objects/Proxy) someday but requires further research. 
-
 **Transpilers**<br>
 Some transpilers, like babel, rename variables in order to emulate certain language features. Rewire will not work in these cases (see [#62](https://github.com/jhnns/rewire/issues/62)). A possible solution might be switching to [babel-plugin-rewire](https://github.com/speedskater/babel-plugin-rewire).
 
diff --git a/lib/index.js b/lib/index.js
index 11229ff..0edcd2c 100644
--- a/lib/index.js
+++ b/lib/index.js
@@ -13,4 +13,4 @@ function rewire(filename) {
 
 module.exports = rewire;
 
-delete require.cache[__filename];   // deleting self from module cache so the parent module is always up to date
\ No newline at end of file
+delete require.cache[__filename];   // deleting self from module cache so the parent module is always up to date
diff --git a/lib/moduleEnv.js b/lib/moduleEnv.js
index 8ad7891..789ea2f 100644
--- a/lib/moduleEnv.js
+++ b/lib/moduleEnv.js
@@ -2,12 +2,15 @@
 
 var Module = require("module"),
     fs = require("fs"),
+    babelCore = require("babel-core"),
+    // Requiring the babel plugin here because otherwise it will be lazy-loaded by Babel during rewire()
+    transformBlockScoping = require("babel-plugin-transform-es2015-block-scoping"),
     coffee;
 
-    // caching original wrapper
 var moduleWrapper0 = Module.wrapper[0],
     moduleWrapper1 = Module.wrapper[1],
     originalExtensions = {},
+    matchCoffeeExt = /\.coffee$/,
     nodeRequire,
     currentModule;
 
@@ -26,7 +29,6 @@ function load(targetModule) {
 function reset() {
     Module.wrapper[0] = moduleWrapper0;
     Module.wrapper[1] = moduleWrapper1;
-    restoreExtensions();
 }
 
 function inject(prelude, appendix) {
@@ -47,23 +49,48 @@ function requireProxy(path) {
 }
 
 function registerExtensions() {
+    var originalJsExtension = require.extensions[".js"];
     var originalCoffeeExtension = require.extensions[".coffee"];
 
+    if (originalJsExtension) {
+        originalExtensions.js = originalJsExtension;
+    }
     if (originalCoffeeExtension) {
         originalExtensions.coffee = originalCoffeeExtension;
     }
+    require.extensions[".js"] = jsExtension;
     require.extensions[".coffee"] = coffeeExtension;
 }
 
 function restoreExtensions() {
+    if ("js" in originalExtensions) {
+        require.extensions[".js"] = originalExtensions.js;
+    }
     if ("coffee" in originalExtensions) {
         require.extensions[".coffee"] = originalExtensions.coffee;
     }
 }
 
+function jsExtension(module, filename) {
+    var _compile = module._compile;
+
+    module._compile = function (content, filename) {
+        content = babelCore.transform(content, {
+            plugins: ["transform-es2015-block-scoping"],
+            retainLines: true,
+            filename: filename
+        }).code;
+        _compile.call(module, content, filename);
+    };
+
+    restoreExtensions();
+    originalExtensions.js(module, filename);
+}
+
 function coffeeExtension(module, filename) {
     var content = stripBOM(fs.readFileSync(filename, "utf8"));
 
+    restoreExtensions();
     content = coffee.compile(content, {
         filename: filename,
         bare: true
diff --git a/lib/rewire.js b/lib/rewire.js
index c52bbeb..cbd24c2 100644
--- a/lib/rewire.js
+++ b/lib/rewire.js
@@ -1,5 +1,6 @@
 var Module = require("module"),
     fs = require("fs"),
+    path = require("path"),
     getImportGlobalsSrc = require("./getImportGlobalsSrc.js"),
     getDefinePropertySrc = require("./getDefinePropertySrc.js"),
     detectStrictMode = require("./detectStrictMode.js"),
diff --git a/package-lock.json b/package-lock.json
new file mode 100644
index 0000000..1352c44
--- /dev/null
+++ b/package-lock.json
@@ -0,0 +1,559 @@
+{
+  "name": "rewire",
+  "version": "2.5.2",
+  "lockfileVersion": 1,
+  "requires": true,
+  "dependencies": {
+    "ansi-regex": {
+      "version": "2.1.1",
+      "resolved": "https://registry.npmjs.org/ansi-regex/-/ansi-regex-2.1.1.tgz",
+      "integrity": "sha1-w7M6te42DYbg5ijwRorn7yfWVN8="
+    },
+    "ansi-styles": {
+      "version": "2.2.1",
+      "resolved": "https://registry.npmjs.org/ansi-styles/-/ansi-styles-2.2.1.tgz",
+      "integrity": "sha1-tDLdM1i2NM914eRmQ2gkBTPB3b4="
+    },
+    "babel-code-frame": {
+      "version": "6.26.0",
+      "resolved": "https://registry.npmjs.org/babel-code-frame/-/babel-code-frame-6.26.0.tgz",
+      "integrity": "sha1-Y/1D99weO7fONZR9uP42mj9Yx0s=",
+      "requires": {
+        "chalk": "1.1.3",
+        "esutils": "2.0.2",
+        "js-tokens": "3.0.2"
+      }
+    },
+    "babel-core": {
+      "version": "6.26.0",
+      "resolved": "https://registry.npmjs.org/babel-core/-/babel-core-6.26.0.tgz",
+      "integrity": "sha1-rzL3izGm/O8RnIew/Y2XU/A6C7g=",
+      "requires": {
+        "babel-code-frame": "6.26.0",
+        "babel-generator": "6.26.0",
+        "babel-helpers": "6.24.1",
+        "babel-messages": "6.23.0",
+        "babel-register": "6.26.0",
+        "babel-runtime": "6.26.0",
+        "babel-template": "6.26.0",
+        "babel-traverse": "6.26.0",
+        "babel-types": "6.26.0",
+        "babylon": "6.18.0",
+        "convert-source-map": "1.5.0",
+        "debug": "2.6.9",
+        "json5": "0.5.1",
+        "lodash": "4.17.4",
+        "minimatch": "3.0.4",
+        "path-is-absolute": "1.0.1",
+        "private": "0.1.8",
+        "slash": "1.0.0",
+        "source-map": "0.5.7"
+      },
+      "dependencies": {
+        "debug": {
+          "version": "2.6.9",
+          "resolved": "https://registry.npmjs.org/debug/-/debug-2.6.9.tgz",
+          "integrity": "sha512-bC7ElrdJaJnPbAP+1EotYvqZsb3ecl5wi6Bfi6BJTUcNowp6cvspg0jXznRTKDjm/E7AdgFBVeAPVMNcKGsHMA==",
+          "requires": {
+            "ms": "2.0.0"
+          }
+        },
+        "minimatch": {
+          "version": "3.0.4",
+          "resolved": "https://registry.npmjs.org/minimatch/-/minimatch-3.0.4.tgz",
+          "integrity": "sha512-yJHVQEhyqPLUTgt9B83PXu6W3rx4MvvHvSUvToogpwoGDOUQ+yDrR0HRot+yOCdCO7u4hX3pWft6kWBBcqh0UA==",
+          "requires": {
+            "brace-expansion": "1.1.8"
+          }
+        },
+        "ms": {
+          "version": "2.0.0",
+          "resolved": "https://registry.npmjs.org/ms/-/ms-2.0.0.tgz",
+          "integrity": "sha1-VgiurfwAvmwpAd9fmGF4jeDVl8g="
+        }
+      }
+    },
+    "babel-generator": {
+      "version": "6.26.0",
+      "resolved": "https://registry.npmjs.org/babel-generator/-/babel-generator-6.26.0.tgz",
+      "integrity": "sha1-rBriAHC3n248odMmlhMFN3TyDcU=",
+      "requires": {
+        "babel-messages": "6.23.0",
+        "babel-runtime": "6.26.0",
+        "babel-types": "6.26.0",
+        "detect-indent": "4.0.0",
+        "jsesc": "1.3.0",
+        "lodash": "4.17.4",
+        "source-map": "0.5.7",
+        "trim-right": "1.0.1"
+      }
+    },
+    "babel-helpers": {
+      "version": "6.24.1",
+      "resolved": "https://registry.npmjs.org/babel-helpers/-/babel-helpers-6.24.1.tgz",
+      "integrity": "sha1-NHHenK7DiOXIUOWX5Yom3fN2ArI=",
+      "requires": {
+        "babel-runtime": "6.26.0",
+        "babel-template": "6.26.0"
+      }
+    },
+    "babel-messages": {
+      "version": "6.23.0",
+      "resolved": "https://registry.npmjs.org/babel-messages/-/babel-messages-6.23.0.tgz",
+      "integrity": "sha1-8830cDhYA1sqKVHG7F7fbGLyYw4=",
+      "requires": {
+        "babel-runtime": "6.26.0"
+      }
+    },
+    "babel-plugin-transform-es2015-block-scoping": {
+      "version": "6.26.0",
+      "resolved": "https://registry.npmjs.org/babel-plugin-transform-es2015-block-scoping/-/babel-plugin-transform-es2015-block-scoping-6.26.0.tgz",
+      "integrity": "sha1-1w9SmcEwjQXBL0Y4E7CgnnOxiV8=",
+      "requires": {
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+        "babel-traverse": "6.26.0",
+        "babel-types": "6.26.0",
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+      "integrity": "sha1-btAhFz4vy0htestFxgCahW9kcHE=",
+      "requires": {
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+        "babel-runtime": "6.26.0",
+        "core-js": "2.5.1",
+        "home-or-tmp": "2.0.0",
+        "lodash": "4.17.4",
+        "mkdirp": "0.5.1",
+        "source-map-support": "0.4.18"
+      }
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+    "babel-runtime": {
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+      "integrity": "sha1-llxwWGaOgrVde/4E/yM3vItWR/4=",
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+      "integrity": "sha1-RqnL1+3MYsjlwGTi0tjQ9ANXZu4=",
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+        "babel-messages": "6.23.0",
+        "babel-runtime": "6.26.0",
+        "babel-types": "6.26.0",
+        "babylon": "6.18.0",
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+        "globals": "9.18.0",
+        "invariant": "2.2.2",
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+    "json5": {
+      "version": "0.5.1",
+      "resolved": "https://registry.npmjs.org/json5/-/json5-0.5.1.tgz",
+      "integrity": "sha1-Hq3nrMASA0rYTiOWdn6tn6VJWCE="
+    },
+    "lodash": {
+      "version": "4.17.4",
+      "resolved": "https://registry.npmjs.org/lodash/-/lodash-4.17.4.tgz",
+      "integrity": "sha1-eCA6TRwyiuHYbcpkYONptX9AVa4="
+    },
+    "loose-envify": {
+      "version": "1.3.1",
+      "resolved": "https://registry.npmjs.org/loose-envify/-/loose-envify-1.3.1.tgz",
+      "integrity": "sha1-0aitM/qc4OcT1l/dCsi3SNR4yEg=",
+      "requires": {
+        "js-tokens": "3.0.2"
+      }
+    },
+    "lru-cache": {
+      "version": "2.7.3",
+      "resolved": "https://registry.npmjs.org/lru-cache/-/lru-cache-2.7.3.tgz",
+      "integrity": "sha1-bUUk6LlV+V1PW1iFHOId1y+06VI=",
+      "dev": true
+    },
+    "minimatch": {
+      "version": "0.3.0",
+      "resolved": "https://registry.npmjs.org/minimatch/-/minimatch-0.3.0.tgz",
+      "integrity": "sha1-J12O2qxPG7MyZHIInnlJyDlGmd0=",
+      "dev": true,
+      "requires": {
+        "lru-cache": "2.7.3",
+        "sigmund": "1.0.1"
+      }
+    },
+    "minimist": {
+      "version": "0.0.8",
+      "resolved": "https://registry.npmjs.org/minimist/-/minimist-0.0.8.tgz",
+      "integrity": "sha1-hX/Kv8M5fSYluCKCYuhqp6ARsF0="
+    },
+    "mkdirp": {
+      "version": "0.5.1",
+      "resolved": "https://registry.npmjs.org/mkdirp/-/mkdirp-0.5.1.tgz",
+      "integrity": "sha1-MAV0OOrGz3+MR2fzhkjWaX11yQM=",
+      "requires": {
+        "minimist": "0.0.8"
+      }
+    },
+    "mocha": {
+      "version": "2.5.3",
+      "resolved": "https://registry.npmjs.org/mocha/-/mocha-2.5.3.tgz",
+      "integrity": "sha1-FhvlvetJZ3HrmzV0UFC2IrWu/Fg=",
+      "dev": true,
+      "requires": {
+        "commander": "2.3.0",
+        "debug": "2.2.0",
+        "diff": "1.4.0",
+        "escape-string-regexp": "1.0.2",
+        "glob": "3.2.11",
+        "growl": "1.9.2",
+        "jade": "0.26.3",
+        "mkdirp": "0.5.1",
+        "supports-color": "1.2.0",
+        "to-iso-string": "0.0.2"
+      }
+    },
+    "ms": {
+      "version": "0.7.1",
+      "resolved": "https://registry.npmjs.org/ms/-/ms-0.7.1.tgz",
+      "integrity": "sha1-nNE8A62/8ltl7/3nzoZO6VIBcJg=",
+      "dev": true
+    },
+    "number-is-nan": {
+      "version": "1.0.1",
+      "resolved": "https://registry.npmjs.org/number-is-nan/-/number-is-nan-1.0.1.tgz",
+      "integrity": "sha1-CXtgK1NCKlIsGvuHkDGDNpQaAR0="
+    },
+    "os-homedir": {
+      "version": "1.0.2",
+      "resolved": "https://registry.npmjs.org/os-homedir/-/os-homedir-1.0.2.tgz",
+      "integrity": "sha1-/7xJiDNuDoM94MFox+8VISGqf7M="
+    },
+    "os-tmpdir": {
+      "version": "1.0.2",
+      "resolved": "https://registry.npmjs.org/os-tmpdir/-/os-tmpdir-1.0.2.tgz",
+      "integrity": "sha1-u+Z0BseaqFxc/sdm/lc0VV36EnQ="
+    },
+    "path-is-absolute": {
+      "version": "1.0.1",
+      "resolved": "https://registry.npmjs.org/path-is-absolute/-/path-is-absolute-1.0.1.tgz",
+      "integrity": "sha1-F0uSaHNVNP+8es5r9TpanhtcX18="
+    },
+    "private": {
+      "version": "0.1.8",
+      "resolved": "https://registry.npmjs.org/private/-/private-0.1.8.tgz",
+      "integrity": "sha512-VvivMrbvd2nKkiG38qjULzlc+4Vx4wm/whI9pQD35YrARNnhxeiRktSOhSukRLFNlzg6Br/cJPet5J/u19r/mg=="
+    },
+    "regenerator-runtime": {
+      "version": "0.11.0",
+      "resolved": "https://registry.npmjs.org/regenerator-runtime/-/regenerator-runtime-0.11.0.tgz",
+      "integrity": "sha512-/aA0kLeRb5N9K0d4fw7ooEbI+xDe+DKD499EQqygGqeS8N3xto15p09uY2xj7ixP81sNPXvRLnAQIqdVStgb1A=="
+    },
+    "repeating": {
+      "version": "2.0.1",
+      "resolved": "https://registry.npmjs.org/repeating/-/repeating-2.0.1.tgz",
+      "integrity": "sha1-UhTFOpJtNVJwdSf7q0FdvAjQbdo=",
+      "requires": {
+        "is-finite": "1.0.2"
+      }
+    },
+    "sigmund": {
+      "version": "1.0.1",
+      "resolved": "https://registry.npmjs.org/sigmund/-/sigmund-1.0.1.tgz",
+      "integrity": "sha1-P/IfGYytIXX587eBhT/ZTQ0ZtZA=",
+      "dev": true
+    },
+    "slash": {
+      "version": "1.0.0",
+      "resolved": "https://registry.npmjs.org/slash/-/slash-1.0.0.tgz",
+      "integrity": "sha1-xB8vbDn8FtHNF61LXYlhFK5HDVU="
+    },
+    "source-map": {
+      "version": "0.5.7",
+      "resolved": "https://registry.npmjs.org/source-map/-/source-map-0.5.7.tgz",
+      "integrity": "sha1-igOdLRAh0i0eoUyA2OpGi6LvP8w="
+    },
+    "source-map-support": {
+      "version": "0.4.18",
+      "resolved": "https://registry.npmjs.org/source-map-support/-/source-map-support-0.4.18.tgz",
+      "integrity": "sha512-try0/JqxPLF9nOjvSta7tVondkP5dwgyLDjVoyMDlmjugT2lRZ1OfsrYTkCd2hkDnJTKRbO/Rl3orm8vlsUzbA==",
+      "requires": {
+        "source-map": "0.5.7"
+      }
+    },
+    "strip-ansi": {
+      "version": "3.0.1",
+      "resolved": "https://registry.npmjs.org/strip-ansi/-/strip-ansi-3.0.1.tgz",
+      "integrity": "sha1-ajhfuIU9lS1f8F0Oiq+UJ43GPc8=",
+      "requires": {
+        "ansi-regex": "2.1.1"
+      }
+    },
+    "supports-color": {
+      "version": "1.2.0",
+      "resolved": "https://registry.npmjs.org/supports-color/-/supports-color-1.2.0.tgz",
+      "integrity": "sha1-/x7R5hFp0Gs88tWI4YixjYhH4X4=",
+      "dev": true
+    },
+    "to-fast-properties": {
+      "version": "1.0.3",
+      "resolved": "https://registry.npmjs.org/to-fast-properties/-/to-fast-properties-1.0.3.tgz",
+      "integrity": "sha1-uDVx+k2MJbguIxsG46MFXeTKGkc="
+    },
+    "to-iso-string": {
+      "version": "0.0.2",
+      "resolved": "https://registry.npmjs.org/to-iso-string/-/to-iso-string-0.0.2.tgz",
+      "integrity": "sha1-TcGeZk38y+Jb2NtQiwDG2hWCVdE=",
+      "dev": true
+    },
+    "trim-right": {
+      "version": "1.0.1",
+      "resolved": "https://registry.npmjs.org/trim-right/-/trim-right-1.0.1.tgz",
+      "integrity": "sha1-yy4SAwZ+DI3h9hQJS5/kVwTqYAM="
+    }
+  }
+}
diff --git a/package.json b/package.json
index 223a59b..16ba88e 100644
--- a/package.json
+++ b/package.json
@@ -36,7 +36,11 @@
   },
   "license": "MIT",
   "scripts": {
-    "test": "mocha -R spec --check-leaks",
+    "test": "mocha -R spec",
     "coverage": "istanbul cover ./node_modules/mocha/bin/_mocha"
+  },
+  "dependencies": {
+    "babel-core": "^6.26.0",
+    "babel-plugin-transform-es2015-block-scoping": "^6.26.0"
   }
 }
diff --git a/test/getImportGlobalsSrc.test.js b/test/getImportGlobalsSrc.test.js
index ab9e946..28ac50c 100644
--- a/test/getImportGlobalsSrc.test.js
+++ b/test/getImportGlobalsSrc.test.js
@@ -25,6 +25,7 @@ describe("getImportGlobalsSrc", function () {
         delete global.module;

         delete global.exports;

         delete global.require;

+        delete global['__core-js_shared__'];

         delete global['a-b'];

 

         expectedGlobals = Object.keys(global);

@@ -60,7 +61,7 @@ describe("getImportGlobalsSrc", function () {
             // node v0.10 does not set a constructor property on the context

             // node v0.11 does set a constructor property

             // so just lets filter it, because it doesn't make sense to mock it anyway

-            return key !== "constructor";

+            return key !== "constructor"

         });

         actualGlobals.sort();

         expectedGlobals.sort();

diff --git a/test/rewire.test.js b/test/rewire.test.js
index ecf3cc9..b6e1499 100644
--- a/test/rewire.test.js
+++ b/test/rewire.test.js
@@ -16,9 +16,7 @@ describe("rewire", function () {
             fs.renameSync(fakeNodeModules, path.resolve(__dirname, "../testLib/node_modules"));
         }
     });
-    it("should pass all shared test cases", function () {
-        require("../testLib/sharedTestCases.js");
-    });
+    require("../testLib/sharedTestCases.js")();
     it("should also work with CoffeeScript", function () {
         var coffeeModule;
 
diff --git a/testLib/constModule.js b/testLib/constModule.js
new file mode 100644
index 0000000..77396d9
--- /dev/null
+++ b/testLib/constModule.js
@@ -0,0 +1,13 @@
+const someOtherModule = require("./someOtherModule");
+const language = "nl";
+
+exports.getLang = () => {
+    return language;
+};
+
+exports.getOtherModuleName = () => {
+    return someOtherModule.name;
+};
+
+exports.filename = __filename;
+exports.dirname = __dirname;
diff --git a/testLib/sharedTestCases.js b/testLib/sharedTestCases.js
index 54e4218..b6caf6a 100644
--- a/testLib/sharedTestCases.js
+++ b/testLib/sharedTestCases.js
@@ -17,7 +17,7 @@ function checkForTypeError(err) {
     expect(err.constructor).to.be(TypeError);
 }
 
-describe("rewire " + (typeof testEnv === "undefined"? "(node)": "(" + testEnv + ")"), function () {
+module.exports = function () {
 
     it("should work like require()", function () {
         rewire("./moduleA.js").getFilename();
@@ -265,7 +265,7 @@ describe("rewire " + (typeof testEnv === "undefined"? "(node)": "(" + testEnv +
             throwError();
         } catch (err) {
             if (err.stack) {
-                expect(err.stack.split("\n")[1]).to.match(/:2:11/);
+                expect(err.stack.split("\n")[1]).to.match(/:7:11/);
             }
         }
     });
@@ -372,4 +372,22 @@ describe("rewire " + (typeof testEnv === "undefined"? "(node)": "(" + testEnv +
         revert();
     });
 
-});
+    it("should be possible to mock a set a const variable using __set__ syntax", function() {
+        var constModule = rewire("./constModule");
+
+        constModule.__set__("language", "de");
+        constModule.__set__("someOtherModule", {
+            name: "differentModule"
+        });
+        expect(constModule.getLang()).to.equal("de");
+        expect(constModule.getOtherModuleName()).to.equal("differentModule");
+    })
+
+    it("should have correct __filename and __dirname when mocked using convertConst", function() {
+        var constModule = rewire("./constModule");
+
+        expect(constModule.filename).to.equal(require("./constModule").filename);
+        expect(constModule.dirname).to.equal(require("./constModule").dirname);
+    });
+
+};
diff --git a/testLib/someOtherModule.js b/testLib/someOtherModule.js
index da38f4c..fe6bbd7 100644
--- a/testLib/someOtherModule.js
+++ b/testLib/someOtherModule.js
@@ -3,4 +3,5 @@
 __filename = "/test/testModules/someOtherModule.js";
 
 exports.fs = {};
-exports.filename = __filename;
\ No newline at end of file
+exports.filename = __filename;
+exports.name = "somOtherModule";
diff --git a/testLib/throwError.js b/testLib/throwError.js
index 9bdf68b..ffb6a71 100644
--- a/testLib/throwError.js
+++ b/testLib/throwError.js
@@ -1,3 +1,8 @@
+// Using const here because we know that Babel will transform that part
+const test = 1;
+
 module.exports = function () {
+    let test = 1;
+
     throw new Error();
 };