Static : fix and improve tests.

- The tests were previously always passing (response.Code is initialised to http.StatusOK, without a router it won't be modified even if the file does not exists).
- Also check response.Body for HEAD and GET requests.

static_test.go

@@ -1,33 +1,42 @@
 package martini
 
 import (
+	"bytes"
 	"net/http"
 	"net/http/httptest"
 	"testing"
 )
 
 func Test_Static(t *testing.T) {
 	response := httptest.NewRecorder()
+	response.Body = new(bytes.Buffer)
 
 	m := New()
+	r := NewRouter()
 
 	m.Use(Static("."))
+	m.Action(r.Handle)
 
 	req, err := http.NewRequest("GET", "http://localhost:3000/martini.go", nil)
 	if err != nil {
 		t.Error(err)
 	}
-
 	m.ServeHTTP(response, req)
 	expect(t, response.Code, http.StatusOK)
+	if response.Body.Len() == 0 {
+		t.Errorf("Got empty body for GET request")
+	}
 }
 
 func Test_Static_Head(t *testing.T) {
 	response := httptest.NewRecorder()
+	response.Body = new(bytes.Buffer)
 
 	m := New()
+	r := NewRouter()
 
 	m.Use(Static("."))
+	m.Action(r.Handle)
 
 	req, err := http.NewRequest("HEAD", "http://localhost:3000/martini.go", nil)
 	if err != nil {
@@ -36,6 +45,9 @@ func Test_Static_Head(t *testing.T) {
 
 	m.ServeHTTP(response, req)
 	expect(t, response.Code, http.StatusOK)
+	if response.Body.Len() != 0 {
+		t.Errorf("Got non-empty body for HEAD request")
+	}
 }
 
 func Test_Static_As_Post(t *testing.T) {