test for v1 of composition

Author: stanistan

render_container_test.go

@@ -0,0 +1,73 @@
+package veun_test
+
+import (
+	"html/template"
+	"testing"
+
+	"github.com/alecthomas/assert/v2"
+
+	. "github.com/stanistan/veun"
+)
+
+type ContainerView struct {
+	Heading Renderable
+	Body    Renderable
+}
+
+func (v ContainerView) Template() (*template.Template, error) {
+	return template.New("containerView").Funcs(template.FuncMap{
+		"slot": func(name string) (template.HTML, error) {
+			switch name {
+			case "heading":
+				return Render(v.Heading)
+			case "body":
+				return Render(v.Body)
+			default:
+				return template.HTML(""), nil
+			}
+		},
+	}).Parse(`<div>
+	<div class="heading">{{ slot "heading" }}</div>
+	<div class="body">{{ slot "body" }}</div>
+</div>`)
+}
+
+func (v ContainerView) TemplateData() (any, error) {
+	return nil, nil
+}
+
+var childViewTemplate = template.Must(
+	template.New("childView").Parse(`{{ . }}`),
+)
+
+type ChildView1 struct{}
+
+func (v ChildView1) Template() (*template.Template, error) {
+	return childViewTemplate, nil
+}
+
+func (v ChildView1) TemplateData() (any, error) {
+	return "HEADING", nil
+}
+
+type ChildView2 struct{}
+
+func (v ChildView2) Template() (*template.Template, error) {
+	return childViewTemplate, nil
+}
+
+func (v ChildView2) TemplateData() (any, error) {
+	return "BODY", nil
+}
+
+func TestRenderContainer(t *testing.T) {
+	html, err := Render(&ContainerView{
+		Heading: ChildView1{},
+		Body:    ChildView2{},
+	})
+	assert.NoError(t, err)
+	assert.Equal(t, template.HTML(`<div>
+	<div class="heading">HEADING</div>
+	<div class="body">BODY</div>
+</div>`), html)
+}