3198b25445
This makes it easier to e.g. conditionally skip a component for rendering.
163 lines
3.7 KiB
Go
163 lines
3.7 KiB
Go
package gomponents_test
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import (
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"errors"
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"fmt"
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"strings"
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"testing"
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g "github.com/maragudk/gomponents"
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"github.com/maragudk/gomponents/assert"
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)
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func TestNodeFunc(t *testing.T) {
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t.Run("implements fmt.Stringer", func(t *testing.T) {
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fn := g.NodeFunc(func() string { return "hat" })
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if fn.String() != "hat" {
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t.FailNow()
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}
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})
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}
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func TestAttr(t *testing.T) {
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t.Run("renders just the local name with one argument", func(t *testing.T) {
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a := g.Attr("required")
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assert.Equal(t, " required", a)
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})
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t.Run("renders the name and value when given two arguments", func(t *testing.T) {
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a := g.Attr("id", "hat")
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assert.Equal(t, ` id="hat"`, a)
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})
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t.Run("panics with more than two arguments", func(t *testing.T) {
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called := false
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defer func() {
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if err := recover(); err != nil {
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called = true
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}
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}()
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g.Attr("name", "value", "what is this?")
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if !called {
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t.FailNow()
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}
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})
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t.Run("implements fmt.Stringer", func(t *testing.T) {
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a := g.Attr("required")
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s := fmt.Sprintf("%v", a)
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if s != " required" {
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t.FailNow()
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}
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})
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}
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type outsider struct{}
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func (o outsider) Render() string {
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return "outsider"
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}
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func TestEl(t *testing.T) {
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t.Run("renders an empty element if no children given", func(t *testing.T) {
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e := g.El("div")
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assert.Equal(t, "<div />", e)
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})
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t.Run("renders an empty element if only attributes given as children", func(t *testing.T) {
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e := g.El("div", g.Attr("class", "hat"))
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assert.Equal(t, `<div class="hat" />`, e)
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})
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t.Run("renders an element, attributes, and element children", func(t *testing.T) {
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e := g.El("div", g.Attr("class", "hat"), g.El("span"))
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assert.Equal(t, `<div class="hat"><span /></div>`, e)
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})
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t.Run("renders attributes at the correct place regardless of placement in parameter list", func(t *testing.T) {
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e := g.El("div", g.El("span"), g.Attr("class", "hat"))
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assert.Equal(t, `<div class="hat"><span /></div>`, e)
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})
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t.Run("renders outside if node does not implement placer", func(t *testing.T) {
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e := g.El("div", outsider{})
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assert.Equal(t, `<div>outsider</div>`, e)
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})
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t.Run("does not fail on nil node", func(t *testing.T) {
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e := g.El("div", g.El("span"), nil, g.El("span"))
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assert.Equal(t, `<div><span /><span /></div>`, e)
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})
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}
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func TestText(t *testing.T) {
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t.Run("renders escaped text", func(t *testing.T) {
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e := g.Text("<div />")
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assert.Equal(t, "<div />", e)
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})
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}
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func TestTextf(t *testing.T) {
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t.Run("renders interpolated and escaped text", func(t *testing.T) {
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e := g.Textf("<%v />", "div")
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assert.Equal(t, "<div />", e)
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})
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}
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func TestRaw(t *testing.T) {
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t.Run("renders raw text", func(t *testing.T) {
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e := g.Raw("<div />")
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assert.Equal(t, "<div />", e)
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})
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}
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type erroringWriter struct{}
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func (w *erroringWriter) Write(p []byte) (n int, err error) {
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return 0, errors.New("don't want to write")
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}
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func TestWrite(t *testing.T) {
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t.Run("writes to the writer", func(t *testing.T) {
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e := g.El("div")
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var b strings.Builder
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err := g.Write(&b, e)
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if err != nil {
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t.FailNow()
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}
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if b.String() != e.Render() {
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t.FailNow()
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}
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})
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t.Run("errors on write error", func(t *testing.T) {
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e := g.El("div")
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err := g.Write(&erroringWriter{}, e)
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if err == nil {
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t.FailNow()
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}
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})
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}
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func TestGroup(t *testing.T) {
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t.Run("groups multiple nodes into one", func(t *testing.T) {
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children := []g.Node{g.El("div", g.Attr("id", "hat")), g.El("div")}
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e := g.El("div", g.Attr("class", "foo"), g.El("div"), g.Group(children))
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assert.Equal(t, `<div class="foo"><div /><div id="hat" /><div /></div>`, e)
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})
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t.Run("panics on direct render", func(t *testing.T) {
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e := g.Group(nil)
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panicced := false
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defer func() {
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if err := recover(); err != nil {
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panicced = true
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}
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}()
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e.Render()
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if !panicced {
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t.FailNow()
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}
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})
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}
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