first commit

Author: sebmck

README.md

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+# 6to5-jest
+
+**package.json**
+
+```json
+{
+  "dependencies": {
+    "6to5": "*",
+    "jest": "*"
+  },
+  "scripts": {
+    "test": "jest"
+  },
+  "jest": {
+    "scriptPreprocessor": "<rootDir>/preprocessor.js",
+    "testFileExtensions": ["es6", "js"],
+    "moduleFileExtensions": ["js", "json", "es6"]
+  }
+}
+```
+
+**preprocessor.js**
+
+```javascript
+var to5 = require("6to5");
+
+module.exports = {
+  process: function (src, filename) {
+    // Ignore all files within node_modules
+    // 6to5 files can be .js and .es6
+    if (filename.indexOf("node_modules") === -1 && to5.canCompile(filename)) {
+      return to5.transform(src, { filename: filename }).code;
+    }
+    return src;
+  }
+};
+```