Add a JPEG optimizer

2015-05-31 18:39:52 +02:00
parent d7ddae38e5
commit 74eabd700c
11 changed files with 274 additions and 30 deletions
@@ -0,0 +1,79 @@
+var should = require('chai').should();
+var imageOptimizer = require('../../lib/tools/weightChecker/imageOptimizer');
+var fs = require('fs');
+var path = require('path');
+
+describe('imageOptimizer', function() {
+    
+    it('should optimize a JPEG image losslessly', function(done) {
+        var fileContent = fs.readFileSync(path.resolve(__dirname, '../fixtures/jpeg-image.jpg'));
+
+        var fileSize = fileContent.length;
+
+        imageOptimizer.compressJpegLosslessly(fileContent).then(function(newFile) {
+            var newFileSize = newFile.contents.length;
+            newFileSize.should.be.below(fileSize);
+            done();
+        }).fail(function(err) {
+            done(err);
+        });
+    });
+
+    it('should optimize a JPEG image lossly', function(done) {
+        var fileContent = fs.readFileSync(path.resolve(__dirname, '../fixtures/jpeg-image.jpg'));
+
+        var fileSize = fileContent.length;
+
+        imageOptimizer.compressJpegLossly(fileContent).then(function(newFile) {
+            var newFileSize = newFile.contents.length;
+            newFileSize.should.be.below(fileSize);
+            done();
+        }).fail(function(err) {
+            done(err);
+        });
+    });
+
+    it('should find the best optimization for a jpeg', function(done) {
+        var fileContent = fs.readFileSync(path.resolve(__dirname, '../fixtures/jpeg-image.jpg'));
+        var fileSize = fileContent.length;
+
+        var entry = {
+            method: 'GET',
+            url: 'http://localhost:8388/an-image.jpg',
+            requestHeaders: {
+                'User-Agent': 'something',
+                Referer: 'http://www.google.fr/',
+                Accept: '*/*',
+                'Accept-Encoding': 'gzip, deflate'
+            },
+            status: 200,
+            isImage: true,
+            type: 'image',
+            contentType: 'image/jpeg',
+            contentLength: 999,
+            weightCheck: {
+                body: fileContent,
+                totalWeight: fileSize + 200,
+                headersSize: 200,
+                bodySize: fileSize,
+                isCompressed: false,
+                uncompressedSize: fileSize
+            }
+        };
+
+        imageOptimizer.optimizeImage(entry)
+
+        .then(function(newEntry) {
+            newEntry.weightCheck.should.have.a.property('isOptimized').that.equals(false);
+            newEntry.weightCheck.should.have.a.property('lossless').that.is.below(fileSize);
+            newEntry.weightCheck.should.have.a.property('lossy').that.is.below(newEntry.weightCheck.lossless);
+
+            done();
+        })
+
+        .fail(function(err) {
+            done(err);
+        });
+    });
+
+});