vweb: add test for new cookie fields

vlib/vweb/tests/vweb_cookie_test.v

@@ -0,0 +1,52 @@
+import vweb
+import net.http
+
+const (
+	port = 8000
+)
+
+struct App {
+	vweb.Context
+}
+
+fn (mut app App) index() vweb.Result {
+	app.set_cookie(vweb.Cookie{
+		name: 'darkmode'
+		value: '0'
+		path: '/' // <------ new
+		domain: '127.0.0.1' // <------ new
+	})
+
+	if cookie := app.get_cookie('darkmode') {
+		println(cookie)
+	}
+
+	return app.html('<h1>Hello world</h1>')
+}
+
+fn main() {
+	go vweb.run(&App{}, port)
+	resp := http.get('http://127.0.0.1:$port/') or { panic('server not running') }
+	darkmode := resp.cookies['darkmode'] or { panic('cookie not set') }
+	value := darkmode[0].ascii_str().int()
+	mut path := ''
+	mut domain := ''
+	path_index := darkmode.index('path=') or { panic("path doesn't exist") } + 5
+	domain_index := darkmode.index('domain=') or { panic("domain doesn't exist") } + 7
+	for ch in darkmode[path_index..] {
+		if ch == `;` {
+			break
+		}
+		path += ch.ascii_str()
+	}
+	for ch in darkmode[domain_index..] {
+		if ch == `;` {
+			break
+		}
+		domain += ch.ascii_str()
+	}
+	assert value == 0
+	assert path == '/'
+	assert domain == '127.0.0.1'
+	println(resp.cookies)
+}