main.go

import (
	"strings"
	"testing"
	"golang.org/x/net/html"
	"github.com/andybalholm/cascadia"
)

func containsHTMLNode(t *testing.T, htmlBody, cssSelector string) bool {
	doc, err := html.Parse(strings.NewReader(htmlBody))
	if err != nil {
		t.Fatal(err)
	}
	
	selector, err := cascadia.Compile(cssSelector)
	if err != nil {
		t.Fatal(err)
	}
	
	return cascadia.Query(doc, selector) != nil
}