added test and realized --source-map is not boolean

lib/cli.js

@@ -15,8 +15,7 @@ var optimist = require('optimist')
     'default': 'none'
   })
   .options('source-map', {
-    describe: 'Emit source map',
-    type: 'boolean'
+    describe: 'Emit source map'
   })
   .options('include-path', {
     describe: 'Path to look for @import-ed files',

test/cli.js

@@ -116,6 +116,15 @@ describe('cli', function() {
     });
   });
 
+  it('should write the stdout with the --stdout option', function(done){
+    var emitter = cli(['--stdout', path.join(__dirname, 'sample.scss')]);
+    emitter.on('error', done);
+    emitter.on('log', function(css){
+      assert.equal(css, expectedSampleNoComments);
+      done();
+    });
+  });
+
   it('should compile with the --source-map option', function(done){
     var emitter = cli([path.join(__dirname, 'sample.scss'), '--source-map']);
     emitter.on('error', done);