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package diff_test
import (
"bytes"
"io/ioutil"
"path/filepath"
"strings"
"testing"
"github.com/pkg/diff"
)
const regenerate = false // set to true to overwrite .out files
func BenchmarkGolden(b *testing.B) {
aa, err := filepath.Glob("testdata/*.a")
if err != nil {
b.Fatal(err)
}
for _, aPath := range aa {
base := strings.TrimSuffix(aPath, ".a")
bPath := base + ".b"
outPath := base + ".out"
out, err := ioutil.ReadFile(outPath)
if err != nil && !regenerate {
b.Fatal(err)
}
buf := new(bytes.Buffer)
buf.Grow(len(out))
b.Run(base, func(b *testing.B) {
for i := 0; i < b.N; i++ {
buf.Reset()
err := diff.Text(aPath, bPath, nil, nil, buf)
if err != nil {
b.Fatal(err)
}
if regenerate {
err := ioutil.WriteFile(outPath, buf.Bytes(), 0644)
if err != nil {
b.Fatal(err)
}
return
}
if !bytes.Equal(buf.Bytes(), out) {
b.Fatal("wrong output")
}
}
})
}
}
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