[linkcheck] Refactor: Improve wait-code

Signed-off-by: Knut Ahlers <knut@ahlers.me>

internal/linkcheck/linkcheck.go

@@ -87,7 +87,6 @@ func (c Checker) scanPartsConnected(parts []string, connector string) (links []s
 
 	for ptJoin := 2; ptJoin < len(parts); ptJoin++ {
 		for i := 0; i <= len(parts)-ptJoin; i++ {
-			wg.Add(1)
 			c.res.Resolve(resolverQueueEntry{
 				Link:      strings.Join(parts[i:i+ptJoin], connector),
 				Callback:  func(link string) { links = str.AppendIfMissing(links, link) },
@@ -108,7 +107,6 @@ func (c Checker) scanPlainNoObfuscate(message string) (links []string) {
 	)
 
 	for _, part := range parts {
-		wg.Add(1)
 		c.res.Resolve(resolverQueueEntry{
 			Link:      part,
 			Callback:  func(link string) { links = str.AppendIfMissing(links, link) },

internal/linkcheck/linkcheck_test.go

@@ -8,6 +8,7 @@ import (
 	"strconv"
 	"testing"
 
+	"github.com/Luzifer/go_helpers/v2/str"
 	"github.com/gorilla/mux"
 	"github.com/stretchr/testify/assert"
 )
@@ -59,9 +60,10 @@ func TestScanForLinks(t *testing.T) {
 	c := New()
 
 	for _, testCase := range []struct {
-		Heuristic     bool
+		Heuristic        bool
-		Message       string
+		Message          string
-		ExpectedLinks []string
+		ExpectedLinks    []string
+		ExpectedContains bool
 	}{
 		// Case: full URL is present in the message
 		{
@@ -187,7 +189,21 @@ func TestScanForLinks(t *testing.T) {
 			}
 			sort.Strings(linksFound)
 
-			assert.Equal(t, testCase.ExpectedLinks, linksFound, "links from message %q", testCase.Message)
+			if testCase.ExpectedContains {
+				for _, expLnk := range testCase.ExpectedLinks {
+					assert.Contains(t, linksFound, expLnk)
+				}
+
+				var extraLinks []string
+				for _, link := range linksFound {
+					if !str.StringInSlice(link, testCase.ExpectedLinks) {
+						extraLinks = append(extraLinks, link)
+					}
+				}
+				t.Logf("extra links found: %v", extraLinks)
+			} else {
+				assert.Equal(t, testCase.ExpectedLinks, linksFound)
+			}
 		})
 	}
 }

internal/linkcheck/resolver.go

@@ -74,6 +74,7 @@ func withSkipVerify() func(*resolver) {
 }
 
 func (r resolver) Resolve(qe resolverQueueEntry) {
+	qe.WaitGroup.Add(1)
 	r.resolverC <- qe
 }