feat(htpasswd): add htpasswd reload test

Signed-off-by: Vladimir Ermakov <vooon341@gmail.com>

pkg/api/htpasswd_test.go

@@ -0,0 +1,64 @@
+package api_test
+
+import (
+	"os"
+	"testing"
+	"time"
+
+	. "github.com/smartystreets/goconvey/convey"
+
+	"zotregistry.dev/zot/pkg/api"
+	"zotregistry.dev/zot/pkg/log"
+	test "zotregistry.dev/zot/pkg/test/common"
+)
+
+func TestHTPasswdWatcher(t *testing.T) {
+	logger := log.NewLogger("DEBUG", "")
+
+	Convey("reload htpasswd", t, func(c C) {
+		username, _ := test.GenerateRandomString()
+		password1, _ := test.GenerateRandomString()
+		password2, _ := test.GenerateRandomString()
+		htpasswdPath := test.MakeHtpasswdFileFromString(test.GetCredString(username, password1))
+
+		defer os.Remove(htpasswdPath)
+
+		htp := api.NewHTPasswd(logger)
+
+		htw, err := api.NewHTPasswdWatcher(htp, "")
+		So(err, ShouldBeNil)
+
+		defer htw.Close() //nolint: errcheck
+
+		_, present := htp.Get(username)
+		So(present, ShouldBeFalse)
+
+		err = htw.ChangeFile(htpasswdPath)
+		So(err, ShouldBeNil)
+
+		// 1. Check user present and it has password1
+		ok, present := htp.Authenticate(username, password1)
+		So(ok, ShouldBeTrue)
+		So(present, ShouldBeTrue)
+
+		ok, present = htp.Authenticate(username, password2)
+		So(ok, ShouldBeFalse)
+		So(present, ShouldBeTrue)
+
+		// 2. Change file
+		err = os.WriteFile(htpasswdPath, []byte(test.GetCredString(username, password2)), 0o600)
+		So(err, ShouldBeNil)
+
+		// 3. Give some time for the background task
+		time.Sleep(10 * time.Millisecond)
+
+		// 4. Check user present and now has password2
+		ok, present = htp.Authenticate(username, password1)
+		So(ok, ShouldBeFalse)
+		So(present, ShouldBeTrue)
+
+		ok, present = htp.Authenticate(username, password2)
+		So(ok, ShouldBeTrue)
+		So(present, ShouldBeTrue)
+	})
+}