vendor: add depends

vendor/github.com/chai2010/image/qrencoder/png_test.go

@@ -0,0 +1,69 @@
+// Copyright 2011 The Go Authors.  All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package qrcode
+
+import (
+	"bytes"
+	"image"
+	"image/color"
+	"image/png"
+	"testing"
+)
+
+func TestPNG(t *testing.T) {
+	c, err := Encode("hello, world", L)
+	if err != nil {
+		t.Fatal(err)
+	}
+	pngdat := c.PNG()
+	m, err := png.Decode(bytes.NewBuffer(pngdat))
+	if err != nil {
+		t.Fatal(err)
+	}
+	gm := m.(*image.Gray)
+
+	scale := c.Scale
+	siz := c.Size
+	nbad := 0
+	for y := 0; y < scale*(8+siz); y++ {
+		for x := 0; x < scale*(8+siz); x++ {
+			v := byte(255)
+			if c.Black(x/scale-4, y/scale-4) {
+				v = 0
+			}
+			if gv := gm.At(x, y).(color.Gray).Y; gv != v {
+				t.Errorf("%d,%d = %d, want %d", x, y, gv, v)
+				if nbad++; nbad >= 20 {
+					t.Fatalf("too many bad pixels")
+				}
+			}
+		}
+	}
+}
+
+func BenchmarkPNG(b *testing.B) {
+	c, err := Encode("0123456789012345678901234567890123456789", L)
+	if err != nil {
+		panic(err)
+	}
+	var bytes []byte
+	for i := 0; i < b.N; i++ {
+		bytes = c.PNG()
+	}
+	b.SetBytes(int64(len(bytes)))
+}
+
+func BenchmarkImagePNG(b *testing.B) {
+	c, err := Encode("0123456789012345678901234567890123456789", L)
+	if err != nil {
+		panic(err)
+	}
+	var buf bytes.Buffer
+	for i := 0; i < b.N; i++ {
+		buf.Reset()
+		png.Encode(&buf, c.Image())
+	}
+	b.SetBytes(int64(buf.Len()))
+}