creating_images_in_go_2.go

func TestNewSceneReturnsANewScene(t *testing.T) {
	scene := NewScene(4, 4)
	rect := image.Rect(0, 0, 4, 4)
	assert.Equal(t, 4, scene.Width, "sets width of the scene")
	assert.Equal(t, 4, scene.Height, "sets height of the scene")
	assert.True(t, assert.ObjectsAreEqualValues(rect, scene.Img.Bounds()),
		"creates an image.RGBA with proper bounds")
}

func NewScene(width int, height int) *Scene {
	return &Scene{
		Width:  width,
		Height: height,
		Img:    image.NewRGBA(image.Rect(0, 0, width, height)),
	}
}