base implementation and tests

Author: Val

index.js

@@ -1,4 +1,19 @@
+var _ = require('lodash');
+var utils = require('loader-utils');
+
 module.exports = function (source) {
-  console.log(source);
+  var query = utils.parseQuery(this.query);
+  var subject = query['subject'];
+  var replacement = query['replacement'];
+  var flags = query['flags'];
+
+  if (_.isString(subject) && _.isString(replacement)) {
+    if (_.isString(flags)) {
+      subject = new RegExp(subject, flags);
+    }
+
+    source = source.replace(subject, replacement);
+  }
+
   return source;
 };

package.json

@@ -10,7 +10,10 @@
     "test": "mocha"
   },
   "main": "index.js",
-  "dependencies": {},
+  "dependencies": {
+    "loader-utils": "^0.2.11",
+    "lodash": "^3.10.1"
+  },
   "devDependencies": {
     "chai": "^3.2.0",
     "mocha": "^2.3.2",

test/index.test.js

@@ -1,33 +1,126 @@
 var path = require('path');
+var fs = require('fs');
 var expect = require('chai').expect;
 var webpack = require('webpack');
 
+var entryFilePath = path.join(__dirname, 'source/entry.js');
+var outputDirPath = path.join(__dirname, 'build');
+var outputFileName = 'build.js';
+var outputFilePath = path.join(outputDirPath, outputFileName);
+
 describe('Webpack replace loader ...', function () {
 
-  it('should replace', function (done) {
+  it('should replace with string subject', function (done) {
+    webpack(
+      {
+        entry: entryFilePath,
+        output: {
+          path: outputDirPath,
+          filename: outputFileName
+        },
+        module: {
+          loaders: [
+            {
+              test: /\.js$/,
+              loader: '__this',
+              query: {
+                subject: 'var value',
+                replacement: 'var v'
+              }
+            }
+          ]
+        }
+      },
+      function (error, stats) {
+        expect(error).to.equal(null);
+
+        fs.readFile(outputFilePath, 'utf8', function (error, contents) {
+          expect(error).to.equal(null);
+          expect(contents).to.be.a('string');
+          expect(contents.indexOf('var value')).to.equal(-1);
+          expect(contents.indexOf('var v')).to.not.equal(-1);
+          done();
+        });
+      }
+    );
+  });
+
+  it('should replace with pattern subject', function (done) {
     webpack(
       {
-        entry: path.join(__dirname, 'source/entry.js'),
+        entry: entryFilePath,
         output: {
-          path: path.join(__dirname, 'build'),
-          filename: 'build.js'
+          path: outputDirPath,
+          filename: outputFileName
         },
         module: {
           loaders: [
             {
               test: /\.js$/,
-              loaders: [
-                '__this'
-              ]
+              loader: '__this',
+              query: {
+                subject: 'var VALUE = \'\.*\'',
+                replacement: 'var v = \'\'',
+                flags: 'i'
+              }
+            }
+          ]
+        }
+      },
+      function (error, stats) {
+        expect(error).to.equal(null);
+
+        fs.readFile(outputFilePath, 'utf8', function (error, contents) {
+          expect(error).to.equal(null);
+          expect(contents).to.be.a('string');
+          expect(contents.indexOf('var value')).to.equal(-1);
+          expect(contents.indexOf('var v = \'\'')).to.not.equal(-1);
+          done();
+        });
+      }
+    );
+  });
+
+  it('should replace scoped', function (done) {
+    webpack(
+      {
+        entry: entryFilePath,
+        output: {
+          path: outputDirPath,
+          filename: outputFileName
+        },
+        module: {
+          loaders: [
+            {
+              test: /\.js$/,
+              loader: '__this',
+              query: {
+                subject: 'var value',
+                replacement: 'var v'
+              }
+            },
+            {
+              test: /bar\.js$/,
+              loader: '__this',
+              query: {
+                subject: 'var value',
+                replacement: 'var bar'
+              }
             }
           ]
         }
       },
       function (error, stats) {
         expect(error).to.equal(null);
 
-        expect(1).to.equal(1);
-        done();
+        fs.readFile(outputFilePath, 'utf8', function (error, contents) {
+          expect(error).to.equal(null);
+          expect(contents).to.be.a('string');
+          expect(contents.indexOf('var value')).to.equal(-1);
+          expect(contents.indexOf('var v')).to.not.equal(-1);
+          expect(contents.indexOf('var bar')).to.not.equal(-1);
+          done();
+        });
       }
     );
   });

test/source/bar.js

@@ -1,3 +1,3 @@
-var value = 'baz';
+var value = 'bar';
 
 module.exports = value;