Add more tests

justfile

@@ -0,0 +1,3 @@
+test:
+    go test -v ./internal/walk/walk_test.go
+    go test -v ./pkg/v2/gtools/gtools_test.go

pkg/v2/gtools/closures.go

@@ -12,7 +12,10 @@ func NewFactorySetup(f func(listitem ListItem)) func(*glib.Object) {
 
 func NewFactoryBind(f func(listitem ListItem, pos int)) func(*glib.Object) {
 	return func(obj *glib.Object) {
-		i := obj.Cast().(ListItem)
+		i, ok := obj.Cast().(ListItem)
+		if !ok {
+			panic("Invalid interface conversion! glib.Objector -> ListItem")
+		}
 		f(i, int(i.Position()))
 	}
 }

pkg/v2/gtools/examples_test.go

@@ -8,6 +8,8 @@ import (
 )
 
 func ExampleFetchObjects() {
+	gtk.Init()
+
 	const xml = `<?xml version="1.0" encoding="UTF-8"?>
 <interface>
   <requires lib="gtk" version="4.0"/>

pkg/v2/gtools/gtools_test.go

@@ -0,0 +1,69 @@
+package gtools_test
+
+import (
+	"testing"
+
+	"github.com/Tom5521/gtk4tools/pkg/v2/gtools"
+	"github.com/diamondburned/gotk4/pkg/gtk/v4"
+)
+
+func TestInitGTK(t *testing.T) {
+	if !gtk.InitCheck() {
+		t.Log("Failed to init GTK")
+		t.FailNow()
+	}
+}
+
+func TestFetch(t *testing.T) {
+	const xml = `<?xml version="1.0" encoding="UTF-8"?>
+<interface>
+  <requires lib="gtk" version="4.0"/>
+  <object class="GtkWindow" id="window">
+    <property name="title">Hello World</property>
+  </object>
+</interface>`
+
+	ui := new(
+		struct {
+			Window *gtk.Window `gtk:"window"`
+		},
+	)
+
+	gtools.FetchObjects(ui, xml)
+
+	if ui.Window == nil {
+		t.Log("ui.Window is nil")
+		t.FailNow()
+	}
+	if ui.Window.Title() != "Hello World" {
+		t.Log("ui.Window.Title() isn't 'Hello World'")
+		t.Fail()
+	}
+}
+
+var (
+	modeller gtools.Modeller[string]
+	items    = []string{"1", "2", "3", "4"}
+)
+
+func testModeller(t *testing.T) {
+	if len(items) != modeller.Len() {
+		t.Log("Modeller len is greater than slices len")
+		t.FailNow()
+	}
+
+	if items[1] != modeller.At(1) {
+		t.Log("Modeller item 1 isn't equal to slice item 1")
+		t.FailNow()
+	}
+}
+
+func TestModel(t *testing.T) {
+	modeller = gtools.NewModel(items...)
+	testModeller(t)
+}
+
+func TestModelVar(t *testing.T) {
+	modeller = gtools.NewModelVar(&items)
+	testModeller(t)
+}