lib/model: Fix minor flakiness in TestModTimeWindow

lib/model/model_test.go

@@ -3389,36 +3389,40 @@ func TestModTimeWindow(t *testing.T) {
 
 	m.ScanFolders()
 
-	v := protocol.Vector{}
-	v = v.Update(myID.Short())
+	// Get current version
+
 	fi, ok := m.CurrentFolderFile("default", name)
 	if !ok {
 		t.Fatal("File missing")
 	}
-	if !fi.Version.Equal(v) {
-		t.Fatalf("Got version %v, expected %v", fi.Version, v)
-	}
+	v := fi.Version
+
+	// Update time on disk 1s
 
 	err = tfs.Chtimes(name, time.Now(), modTime.Add(time.Second))
 	must(t, err)
 
 	m.ScanFolders()
 
-	// No change due to window
+	// No change due to within window
+
 	fi, _ = m.CurrentFolderFile("default", name)
 	if !fi.Version.Equal(v) {
 		t.Fatalf("Got version %v, expected %v", fi.Version, v)
 	}
 
+	// Update to be outside window
+
 	err = tfs.Chtimes(name, time.Now(), modTime.Add(2*time.Second))
 	must(t, err)
 
 	m.ScanFolders()
 
-	v = v.Update(myID.Short())
+	// Version should have updated
+
 	fi, _ = m.CurrentFolderFile("default", name)
-	if !fi.Version.Equal(v) {
-		t.Fatalf("Got version %v, expected %v", fi.Version, v)
+	if fi.Version.Compare(v) != protocol.Greater {
+		t.Fatalf("Got result %v, expected %v", fi.Version.Compare(v), protocol.Greater)
 	}
 }