Add benchmark for 2021-12

Author: vsliouniaev

Diff for: 2021/12/main_test.go

@@ -0,0 +1,18 @@
+package main
+
+import (
+	u "github.com/vsliouniaev/aoc/util"
+	"testing"
+)
+
+func BenchmarkPart1(t *testing.B) {
+	for i := 0; i < t.N; i++ {
+		part1(u.RelativeFile("input"))
+	}
+}
+
+func BenchmarkPart2(t *testing.B) {
+	for i := 0; i < t.N; i++ {
+		part2(u.RelativeFile("input"))
+	}
+}

Diff for: util/nav/grid_test.go

@@ -10,8 +10,8 @@ func TestIterator(t *testing.T) {
 		{1, 2},
 		{3, 4},
 	}
-	i := g.GetIterator()
-	for p := i.Next(); p != nil; p = i.Next() {
+
+	for i, p := g.GetIterator(); p != nil; p = i.Next() {
 		fmt.Printf("%s = %d\n", p, g.Get(p).(int))
 	}
 

Diff for: util/nav/point_test.go

@@ -7,7 +7,7 @@ import (
 func TestRotate(t *testing.T) {
 	p := Point{X: 10, Y: 4}
 	p.Rotate(Right)
-	if p.X != -10 && p.Y != 4 {
+	if p.X != 4 && p.Y != -10 {
 		t.Errorf("Expected right turn to perform 90 degrees clockwise")
 	}
 }

Diff for: util/parse.go

@@ -103,5 +103,10 @@ func RelativeFile(file string) string {
 	_, b, _, _ := runtime.Caller(1)
 	path, err := os.Getwd()
 	Check(err)
-	return filepath.Join(strings.TrimPrefix(filepath.Dir(b), path)[1:], file)
+	trimPath := strings.TrimPrefix(filepath.Dir(b), path)
+	if trimPath == "" {
+		return filepath.Join(path, file)
+	} else {
+		return filepath.Join(trimPath[1:], file)
+	}
 }