Prepare Sandwich Hime v1 release candidate source

sando/benchmark_test.go

@@ -0,0 +1,119 @@
+// SPDX-License-Identifier: Apache-2.0
+
+package sando
+
+import (
+	"bytes"
+	"context"
+	"html/template"
+	"io"
+	"testing"
+)
+
+type benchmarkView struct {
+	Title string
+	URL   string
+	Admin bool
+	Items []string
+}
+
+var (
+	benchmarkContext = context.Background()
+	benchmarkData    = benchmarkView{
+		Title: `A typed <view> & its "output"`,
+		URL:   "/projects/sandwich-hime/?from=benchmark&mode=equivalent",
+		Admin: true,
+		Items: []string{"compiler", "runtime", "language server", "editor tooling"},
+	}
+	benchmarkHTMLTemplate = template.Must(template.New("v1-corpus").Parse(`<article data-title="{{.Title}}"><h1>{{.Title}}</h1>{{if .Admin}}<strong>Admin</strong>{{end}}<ul>{{range .Items}}<li>{{.}}</li>{{end}}</ul><a href="{{.URL}}">Open</a></article>`))
+)
+
+func benchmarkSandoComponent(view benchmarkView) Component {
+	return ComponentFunc(func(_ context.Context, writer io.Writer) error {
+		if err := WriteString(writer, `<article data-title="`); err != nil {
+			return err
+		}
+		if err := WriteAttr(writer, view.Title); err != nil {
+			return err
+		}
+		if err := WriteString(writer, `"><h1>`); err != nil {
+			return err
+		}
+		if err := WriteText(writer, view.Title); err != nil {
+			return err
+		}
+		if err := WriteString(writer, `</h1>`); err != nil {
+			return err
+		}
+		if view.Admin {
+			if err := WriteString(writer, `<strong>Admin</strong>`); err != nil {
+				return err
+			}
+		}
+		if err := WriteString(writer, `<ul>`); err != nil {
+			return err
+		}
+		for _, item := range view.Items {
+			if err := WriteString(writer, `<li>`); err != nil {
+				return err
+			}
+			if err := WriteText(writer, item); err != nil {
+				return err
+			}
+			if err := WriteString(writer, `</li>`); err != nil {
+				return err
+			}
+		}
+		if err := WriteString(writer, `</ul><a href="`); err != nil {
+			return err
+		}
+		if err := WriteURL(writer, view.URL); err != nil {
+			return err
+		}
+		return WriteString(writer, `">Open</a></article>`)
+	})
+}
+
+func TestBenchmarkCorpusEquivalent(t *testing.T) {
+	t.Parallel()
+	var himeOutput bytes.Buffer
+	if err := Render(benchmarkContext, &himeOutput, benchmarkSandoComponent(benchmarkData)); err != nil {
+		t.Fatal(err)
+	}
+	var standardOutput bytes.Buffer
+	if err := benchmarkHTMLTemplate.Execute(&standardOutput, benchmarkData); err != nil {
+		t.Fatal(err)
+	}
+	if himeOutput.String() != standardOutput.String() {
+		t.Fatalf("benchmark corpus is not output-equivalent\nhtml/template: %q\nSandwich Hime: %q", standardOutput.String(), himeOutput.String())
+	}
+}
+
+func BenchmarkV1CorpusSandwichHime(b *testing.B) {
+	b.ReportAllocs()
+	b.SetBytes(int64(renderedBenchmarkSize(b)))
+	for b.Loop() {
+		if err := Render(benchmarkContext, io.Discard, benchmarkSandoComponent(benchmarkData)); err != nil {
+			b.Fatal(err)
+		}
+	}
+}
+
+func BenchmarkV1CorpusHTMLTemplate(b *testing.B) {
+	b.ReportAllocs()
+	b.SetBytes(int64(renderedBenchmarkSize(b)))
+	for b.Loop() {
+		if err := benchmarkHTMLTemplate.Execute(io.Discard, benchmarkData); err != nil {
+			b.Fatal(err)
+		}
+	}
+}
+
+func renderedBenchmarkSize(tb testing.TB) int {
+	tb.Helper()
+	var output bytes.Buffer
+	if err := Render(benchmarkContext, &output, benchmarkSandoComponent(benchmarkData)); err != nil {
+		tb.Fatal(err)
+	}
+	return output.Len()
+}