From deb2af90084d57184898d833608f52450911a948 Mon Sep 17 00:00:00 2001
From: Roman Atachiants <roman.atachiants@gmail.com>
Date: Sun, 19 Jun 2022 10:21:36 +0400
Subject: [PATCH] Fix MoveBy

---
 go.mod        |  6 ++++--
 point.go      | 12 ++++++------
 point_test.go | 12 ++++++------
 3 files changed, 16 insertions(+), 14 deletions(-)

diff --git a/go.mod b/go.mod
index d409ec9..b083e2b 100644
--- a/go.mod
+++ b/go.mod
@@ -2,11 +2,13 @@ module github.com/kelindar/tile
 
 go 1.17
 
-require github.com/stretchr/testify v1.7.0
+require (
+	github.com/kelindar/iostream v1.2.0
+	github.com/stretchr/testify v1.7.0
+)
 
 require (
 	github.com/davecgh/go-spew v1.1.0 // indirect
-	github.com/kelindar/iostream v1.2.0 // indirect
 	github.com/pmezard/go-difflib v1.0.0 // indirect
 	gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c // indirect
 )
diff --git a/point.go b/point.go
index bbebcb7..2803de4 100644
--- a/point.go
+++ b/point.go
@@ -197,21 +197,21 @@ func (p Point) Move(direction Direction) Point {
 func (p Point) MoveBy(direction Direction, n int16) Point {
 	switch direction {
 	case North:
-		return Point{p.X, p.Y + n}
+		return Point{p.X, p.Y - n}
 	case NorthEast:
-		return Point{p.X + n, p.Y + n}
+		return Point{p.X + n, p.Y - n}
 	case East:
 		return Point{p.X + n, p.Y}
 	case SouthEast:
-		return Point{p.X + n, p.Y - n}
+		return Point{p.X + n, p.Y + n}
 	case South:
-		return Point{p.X, p.Y - n}
+		return Point{p.X, p.Y + n}
 	case SouthWest:
-		return Point{p.X - n, p.Y - n}
+		return Point{p.X - n, p.Y + n}
 	case West:
 		return Point{p.X - n, p.Y}
 	case NorthWest:
-		return Point{p.X - n, p.Y + n}
+		return Point{p.X - n, p.Y - n}
 	default:
 		return p
 	}
diff --git a/point_test.go b/point_test.go
index ab212e0..aaebbfe 100644
--- a/point_test.go
+++ b/point_test.go
@@ -90,14 +90,14 @@ func TestMove(t *testing.T) {
 		dir Direction
 		out Point
 	}{
-		{North, Point{X: 0, Y: 1}},
-		{South, Point{X: 0, Y: -1}},
+		{North, Point{X: 0, Y: -1}},
+		{South, Point{X: 0, Y: 1}},
 		{East, Point{X: 1, Y: 0}},
 		{West, Point{X: -1, Y: 0}},
-		{NorthEast, Point{X: 1, Y: 1}},
-		{NorthWest, Point{X: -1, Y: 1}},
-		{SouthEast, Point{X: 1, Y: -1}},
-		{SouthWest, Point{X: -1, Y: -1}},
+		{NorthEast, Point{X: 1, Y: -1}},
+		{NorthWest, Point{X: -1, Y: -1}},
+		{SouthEast, Point{X: 1, Y: 1}},
+		{SouthWest, Point{X: -1, Y: 1}},
 		{Direction(99), Point{}},
 	}