Improve request package and add more unit tests

http/request/cookie_test.go

@@ -0,0 +1,33 @@
+// Copyright 2018 Frédéric Guillot. All rights reserved.
+// Use of this source code is governed by the Apache 2.0
+// license that can be found in the LICENSE file.
+
+package request // import "miniflux.app/http/request"
+
+import (
+	"net/http"
+	"testing"
+)
+
+func TestGetCookieValue(t *testing.T) {
+	r, _ := http.NewRequest("GET", "http://example.org", nil)
+	r.AddCookie(&http.Cookie{Value: "cookie_value", Name: "my_cookie"})
+
+	result := CookieValue(r, "my_cookie")
+	expected := "cookie_value"
+
+	if result != expected {
+		t.Errorf(`Unexpected cookie value, got %q instead of %q`, result, expected)
+	}
+}
+
+func TestGetCookieValueWhenUnset(t *testing.T) {
+	r, _ := http.NewRequest("GET", "http://example.org", nil)
+
+	result := CookieValue(r, "my_cookie")
+	expected := ""
+
+	if result != expected {
+		t.Errorf(`Unexpected cookie value, got %q instead of %q`, result, expected)
+	}
+}