delete fake mirroring type

nes/ppu_test.go

@@ -8,42 +8,6 @@ import (
 
 // TODO: `H` の文字のテスト
 
-type fakeCPU struct{}
-
-func (f *fakeCPU) SetDelayNMI()    {}
-func (f *fakeCPU) SetNMI(val bool) {}
-
-type fakeMirroringType int
-
-const (
-	fakeMirroringVertical fakeMirroringType = iota
-	fakeMirroringHorizontal
-	fakeMirroringFourScreen
-)
-
-func (f *fakeMirroringType) IsVertical() bool {
-	return *f == fakeMirroringVertical
-}
-func (f *fakeMirroringType) IsHorizontal() bool {
-	return *f == fakeMirroringHorizontal
-}
-func (f *fakeMirroringType) IsFourScreen() bool {
-	return *f == fakeMirroringFourScreen
-}
-
-func getFakeMirroringVertical() fakeMirroringType {
-	m := fakeMirroringVertical
-	return m
-}
-func getFakeMirroringHorizontal() fakeMirroringType {
-	m := fakeMirroringHorizontal
-	return m
-}
-func getFakeMirroringFourScreen() fakeMirroringType {
-	m := fakeMirroringFourScreen
-	return m
-}
-
 func Test_PPU_MirrorVRAMAddr(t *testing.T) {
 	t.Parallel()
 	tests := []struct {
@@ -55,56 +19,48 @@ func Test_PPU_MirrorVRAMAddr(t *testing.T) {
 		{
 			"1",
 			newVRAM(MirroringHorizontal),
-			// newVRAM(getFakeMirroringHorizontal()),
 			0x2003,
 			0x0003,
 		},
 		{
 			"2",
 			newVRAM(MirroringHorizontal),
-			//newVRAM(getFakeMirroringHorizontal()),
 			0x2403,
 			0x0003,
 		},
 		{
 			"3",
 			newVRAM(MirroringHorizontal),
-			//newVRAM(getFakeMirroringHorizontal()),
 			0x2800,
 			0x0400,
 		},
 		{
 			"4",
 			newVRAM(MirroringHorizontal),
-			//newVRAM(getFakeMirroringHorizontal()),
 			0x2C00,
 			0x0400,
 		},
 		{
 			"5",
 			newVRAM(MirroringVertical),
-			//newVRAM(getFakeMirroringVertical()),
 			0x2000,
 			0x0000,
 		},
 		{
 			"6",
 			newVRAM(MirroringVertical),
-			//newVRAM(getFakeMirroringVertical()),
 			0x2801,
 			0x0001,
 		},
 		{
 			"7",
 			newVRAM(MirroringVertical),
-			//newVRAM(getFakeMirroringVertical()),
 			0x2400,
 			0x0400,
 		},
 		{
 			"8",
 			newVRAM(MirroringVertical),
-			//newVRAM(getFakeMirroringVertical()),
 			0x2C01,
 			0x0401,
 		},