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node_modules/gulp-minify-css/test/minify.js

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+var gulp = require('gulp'),
+  expect = require('chai').expect,
+  minifyCSS = require('../'),
+  CleanCSS = require('clean-css'),
+  es = require('event-stream'),
+  Stream = require('stream'),
+  path = require('path'),
+  fs = require('fs');
+
+require('mocha');
+
+describe('gulp-minify-css minification', function() {
+  var opts = {
+    keepSpecialComments: 1,
+    keepBreaks: true
+  };
+  
+  describe('with buffers', function() {
+    var filename = path.join(__dirname, './fixture/index.css');
+    it('should minify my files', function(done) {
+      gulp.src(filename)
+      .pipe(minifyCSS(opts))
+      .pipe(es.map(function(file){
+        var source = fs.readFileSync(filename),
+          expected = new CleanCSS(opts).minify(source.toString());
+        expect(expected).to.be.equal(file.contents.toString());
+        done();
+      }));
+    });
+
+    it('should return file.contents as a buffer', function(done) {
+      gulp.src(filename)
+      .pipe(minifyCSS())
+      .pipe(es.map(function(file) {
+        expect(file.contents).to.be.an.instanceof(Buffer);
+        done();
+      }));
+    });
+  });
+  describe('with streams', function() {
+    var filename = path.join(__dirname, './fixture/index.css');
+    it('should minify my files', function(done) {
+      gulp.src(filename, {buffer: false})
+      .pipe(minifyCSS(opts))
+      .pipe(es.map(function(file){
+        var source = fs.readFileSync(filename),
+          expected = new CleanCSS(opts).minify(source.toString());
+        file.contents.pipe(es.wait(function(err, data) {
+          expect(expected).to.be.equal(data);
+          done();
+        }));
+      }));
+    });
+
+    it('should return file.contents as a buffer', function(done) {
+      gulp.src(filename, {buffer: false})
+      .pipe(minifyCSS(opts))
+      .pipe(es.map(function(file) {
+        expect(file.contents).to.be.an.instanceof(Stream);
+        done();
+      }));
+    });
+  });
+});