1 files changed, 76 insertions, 0 deletions
diff --git a/vendor/golang.org/x/image/vector/vector_test.go b/vendor/golang.org/x/image/vector/vector_test.go
new file mode 100644
index 000000000..3aa8c192f
--- /dev/null
+++ b/vendor/golang.org/x/image/vector/vector_test.go
@@ -0,0 +1,76 @@
+// Copyright 2016 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 vector
+
+// TODO: add tests for NaN and Inf coordinates.
+
+import (
+	"image"
+	"image/draw"
+	"image/png"
+	"os"
+	"testing"
+
+	"golang.org/x/image/math/f32"
+)
+
+// encodePNG is useful for manually debugging the tests.
+func encodePNG(dstFilename string, src image.Image) error {
+	f, err := os.Create(dstFilename)
+	if err != nil {
+		return err
+	}
+	encErr := png.Encode(f, src)
+	closeErr := f.Close()
+	if encErr != nil {
+		return encErr
+	}
+	return closeErr
+}
+
+func TestBasicPath(t *testing.T) {
+	want := []byte{
+		0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+		0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+		0x00, 0x00, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xe3, 0xaa, 0x3e, 0x00, 0x00, 0x00, 0x00, 0x00,
+		0x00, 0x00, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xfa, 0x5f, 0x00, 0x00, 0x00, 0x00,
+		0x00, 0x00, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xfc, 0x24, 0x00, 0x00, 0x00,
+		0x00, 0x00, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xa1, 0x00, 0x00, 0x00,
+		0x00, 0x00, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xfc, 0x14, 0x00, 0x00,
+		0x00, 0x00, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x4a, 0x00, 0x00,
+		0x00, 0x00, 0xcc, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x81, 0x00, 0x00,
+		0x00, 0x00, 0x66, 0xff, 0xff, 0xff, 0xff, 0xff, 0xef, 0xe4, 0xff, 0xff, 0xff, 0xb6, 0x00, 0x00,
+		0x00, 0x00, 0x0c, 0xf2, 0xff, 0xff, 0xfe, 0x9e, 0x15, 0x00, 0x15, 0x96, 0xff, 0xce, 0x00, 0x00,
+		0x00, 0x00, 0x00, 0x88, 0xfc, 0xe3, 0x43, 0x00, 0x00, 0x00, 0x00, 0x06, 0xcd, 0xdc, 0x00, 0x00,
+		0x00, 0x00, 0x00, 0x00, 0x10, 0x0f, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x25, 0xde, 0x00, 0x00,
+		0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x56, 0x00, 0x00,
+		0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+		0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+	}
+
+	z := NewRasterizer(16, 16)
+	z.MoveTo(f32.Vec2{2, 2})
+	z.LineTo(f32.Vec2{8, 2})
+	z.QuadTo(f32.Vec2{14, 2}, f32.Vec2{14, 14})
+	z.CubeTo(f32.Vec2{8, 2}, f32.Vec2{5, 20}, f32.Vec2{2, 8})
+	z.ClosePath()
+
+	dst := image.NewAlpha(z.Bounds())
+	z.DrawOp = draw.Src
+	z.Draw(dst, dst.Bounds(), image.Opaque, image.Point{})
+
+	got := dst.Pix
+	if len(got) != len(want) {
+		t.Fatalf("len(got)=%d and len(want)=%d differ", len(got), len(want))
+	}
+	for i := range got {
+		delta := int(got[i]) - int(want[i])
+		// The +/- 2 allows different implementations to give different
+		// rounding errors.
+		if delta < -2 || +2 < delta {
+			t.Errorf("i=%d: got %#02x, want %#02x", i, got[i], want[i])
+		}
+	}
+}