added a simple test for the host_redirect middleware using mocha and should.js

Makefile

@@ -1,9 +1,11 @@
 .SILENT:
-.PHONY: build watch
+.PHONY: build watch docs test
 
-COFFEE_SRC = src
-COFFEE_OUT = .
 BIN = ./node_modules/.bin
+COFFEE_SRC = ./src
+COFFEE_OUT = ./
+REPORTER = spec
+TEST_DIR = ./test
 
 build:
 	$(BIN)/coffee -c -o $(COFFEE_OUT) $(COFFEE_SRC)
@@ -13,3 +15,6 @@ watch:
 
 docs:
 	$(BIN)/docco $(shell find $(COFFEE_SRC) -name '*.coffee')
+
+test:
+	$(BIN)/mocha -R $(REPORTER) $(TEST_DIR)/*.js

package.json

@@ -8,6 +8,8 @@
     "coffeekup": "0.3.1"
   },
   "devDependencies": {
-    "docco": "0.3.0"
+    "docco": "*",
+    "mocha": "*",
+    "should": "*"
   }
 }

src/test/host_redirect.test.coffee

@@ -0,0 +1,28 @@
+require 'should'
+
+host_rewrite = require '../middleware/host_redirect'
+
+describe 'host_redirect', ->
+
+  redirect_map =
+    'www.foo.com': 'http://foo.com/',
+    'img.foo.com': 'http://images.foo.com/'
+
+  redirector = host_rewrite(redirect_map)
+
+  describe 'when request does not match any entry in map', ->
+    it 'next() is called to pass on the request', (done) ->
+      req = { header: -> 'www.bar.com' }
+      res = {}
+      next = -> done()
+      redirector(req, res, next)
+
+  describe 'when request matches an entry in map', ->
+    it 'req.redirect() is called with the new URL', (done) ->
+      req = { header: -> 'img.foo.com' }
+      res =
+        redirect: (url) ->
+          url.should.equal(redirect_map[req.header()])
+          done()
+      next = ->
+      redirector(req, res, next)

test/host_redirect.test.js

@@ -0,0 +1,50 @@
+(function() {
+  var host_rewrite;
+
+  require('should');
+
+  host_rewrite = require('../middleware/host_redirect');
+
+  describe('host_redirect', function() {
+    var redirect_map, redirector;
+    redirect_map = {
+      'www.foo.com': 'http://foo.com/',
+      'img.foo.com': 'http://images.foo.com/'
+    };
+    redirector = host_rewrite(redirect_map);
+    describe('when request does not match any entry in map', function() {
+      return it('next() is called to pass on the request', function(done) {
+        var next, req, res;
+        req = {
+          header: function() {
+            return 'www.bar.com';
+          }
+        };
+        res = {};
+        next = function() {
+          return done();
+        };
+        return redirector(req, res, next);
+      });
+    });
+    return describe('when request matches an entry in map', function() {
+      return it('req.redirect() is called with the new URL', function(done) {
+        var next, req, res;
+        req = {
+          header: function() {
+            return 'img.foo.com';
+          }
+        };
+        res = {
+          redirect: function(url) {
+            url.should.equal(redirect_map[req.header()]);
+            return done();
+          }
+        };
+        next = function() {};
+        return redirector(req, res, next);
+      });
+    });
+  });
+
+}).call(this);