Add test for NewImageFromImage

image_test.go

@@ -0,0 +1,63 @@
+/*
+Copyright 2014 Hajime Hoshi
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package ebiten_test
+
+import (
+	. "."
+	"image"
+	"image/color"
+	_ "image/png"
+	"os"
+	"testing"
+)
+
+func TestNewImageFromImage(t *testing.T) {
+	file, err := os.Open("testdata/ebiten.png")
+	if err != nil {
+		t.Fatal(err)
+		return
+	}
+	defer file.Close()
+
+	img, _, err := image.Decode(file)
+	if err != nil {
+		t.Fatal(err)
+		return
+	}
+
+	eimg, err := NewImageFromImage(img, FilterNearest)
+	if err != nil {
+		t.Fatal(err)
+		return
+	}
+
+	if got := eimg.Bounds().Size(); got != img.Bounds().Size() {
+		t.Errorf("img size: got %d; want %d", got, img.Bounds().Size())
+	}
+
+	for j := 0; j < eimg.Bounds().Size().Y; j++ {
+		for i := 0; i < eimg.Bounds().Size().X; i++ {
+			got := eimg.At(i, j)
+			want := color.RGBAModel.Convert(img.At(i, j))
+			if got != want {
+				t.Errorf("img(%d, %d): got %#v; want %#v", i, j, got, want)
+			}
+		}
+	}
+}
+
+// TODO: Add more tests (e.g. DrawImage with color matrix)