Add integration tests for multiple search engines and enhance error handling

- Implement integration tests for Baidu, Bing, DuckDuckGo, Google, and Yandex.
- Refactor test utility functions to avoid core import cycles.

yandex/search_test.go

@@ -5,36 +5,21 @@ package yandex
 
 import (
 	"testing"
-	"time"
 
 	"github.com/karust/openserp/core"
 	"github.com/karust/openserp/testutil"
+	"github.com/karust/openserp/testutil/ithelper"
 )
 
-func createTestBrowser(t *testing.T) *core.Browser {
-	t.Helper()
-	opts := core.BrowserOpts{IsHeadless: false, IsLeakless: false, Timeout: time.Second * 15, LeavePageOpen: true}
-	b, err := core.NewBrowser(opts)
-	if err != nil {
-		t.Fatalf("failed to create test browser: %v", err)
-	}
-	return b
-}
-
 func TestSearchYandex(t *testing.T) {
 	testutil.RequireIntegration(t)
 
-	browser := createTestBrowser(t)
+	browser := ithelper.CreateBrowser(t)
 	yand := New(*browser, core.SearchEngineOptions{})
 
 	query := core.Query{Text: "HEY", Limit: 10}
 	results, err := yand.Search(query)
-	if err != nil {
-		if err == core.ErrSearchTimeout || err == core.ErrCaptcha {
-			t.Skipf("skipping unstable live yandex search result: %v", err)
-		}
-		t.Fatalf("Cannot [SearchYandex]: %s", err)
-	}
+	ithelper.HandleError(t, "yandex web search", err)
 
 	if len(results) == 0 {
 		t.Fatalf("[SearchYandex] returned empty result")
@@ -44,14 +29,12 @@ func TestSearchYandex(t *testing.T) {
 func TestImageYandex(t *testing.T) {
 	testutil.RequireIntegration(t)
 
-	browser := createTestBrowser(t)
+	browser := ithelper.CreateBrowser(t)
 	yand := New(*browser, core.SearchEngineOptions{})
 
 	query := core.Query{Text: "furry tiger", Limit: 30}
 	results, err := yand.SearchImage(query)
-	if err != nil {
-		t.Fatalf("Cannot [ImageYandex]: %s", err)
-	}
+	ithelper.HandleError(t, "yandex image search", err)
 
 	if len(results) == 0 {
 		t.Fatalf("[ImageYandex] returned empty result")