Fix tests for GetCookie() and SetCookie()

context.go

@@ -349,13 +349,13 @@ func (c *Context) SetCookie(
 	c.Writer.Header().Add("Set-Cookie", cookie.String())
 }
 
-func (c *Context) GetCookie(name string) string {
+func (c *Context) GetCookie(name string) (string, error) {
 	cookie, err := c.Request.Cookie(name)
 	if err != nil {
-		return ""
+		return "", err
 	}
 	val, _ := url.QueryUnescape(cookie.Value)
-	return val
+	return val, nil
 }
 
 func (c *Context) Render(code int, r render.Render) {

context_test.go

@@ -248,20 +248,18 @@ func TestContextPostFormMultipart(t *testing.T) {
 }
 
 func TestContextSetCookie(t *testing.T) {
-	c, w, _ := createTestContext()
+	c, _, _ := createTestContext()
 	c.SetCookie("user", "gin", 1, "/", "localhost", true, true)
-	c.SetCookie("user", "gin", int32(1), "/", "localhost", 1)
-	c.SetCookie("user", "gin", int64(1))
-
 	c.Request, _ = http.NewRequest("GET", "/set", nil)
-	assert.Equal(t, c.GetCookie("Set-Cookie"), "user=gin; Path=/; Domain=localhost; Max-Age=1; HttpOnly; Secure")
+	assert.Equal(t, c.Writer.Header().Get("Set-Cookie"), "user=gin; Path=/; Domain=localhost; Max-Age=1; HttpOnly; Secure")
 }
 
 func TestContextGetCookie(t *testing.T) {
-	c, w, _ := createTestContext()
+	c, _, _ := createTestContext()
 	c.Request, _ = http.NewRequest("GET", "/get", nil)
 	c.Request.Header.Set("Cookie", "user=gin")
-	assert.Equal(t, c.GetCookie("Cookie"), "gin")
+	cookie, _ := c.GetCookie("user")
+	assert.Equal(t, cookie, "gin")
 }
 
 // Tests that the response is serialized as JSON