4 files changed, 48 insertions, 39 deletions

diff --git a/pkg/field/step.go b/pkg/field/step.go
index 50147d2..eee6f95 100644
--- a/pkg/field/step.go
+++ b/pkg/field/step.go
@@ -2,19 +2,15 @@ package field
 
 func (f Field) Step(x, y, dx, dy int) (int, int) {
 	x2, y2 := x+dx, y+dy
-	if f.IsIn(x2, y2) {
+	if f.isIn(x2, y2) {
 		return x2, y2
 	}
 	// We are stepping outside, we need to wrap the Lahey-space
 	for {
 		x2, y2 := x-dx, y-dy
-		if !f.IsIn(x2, y2) {
+		if !f.isIn(x2, y2) {
 			return x, y
 		}
 		x, y = x2, y2
 	}
 }
-
-func (f Field) IsIn(x, y int) bool {
-	return x >= f.x && x < f.x+f.lx && y >= f.y && y < f.y+f.ly
-}
diff --git a/pkg/field/step_test.go b/pkg/field/step_test.go
index f7da366..e21540c 100644
--- a/pkg/field/step_test.go
+++ b/pkg/field/step_test.go
@@ -40,36 +40,3 @@ func TestStep(t *testing.T) {
 		})
 	}
 }
-
-func TestIsIn(t *testing.T) {
-	// Test cases
-	testCases := []struct {
-		name     string
-		input    string
-		inputX   int
-		inputY   int
-		expected bool
-	}{
-		{"minimal0,0", "test_data/minimal.b98", 0, 0, true},
-		{"minimal-1,0", "test_data/minimal.b98", -1, 0, false},
-		{"minimal1,0", "test_data/minimal.b98", 1, 0, false},
-		{"minimal0,-1", "test_data/minimal.b98", 0, -1, false},
-		{"minimal0,1", "test_data/minimal.b98", 0, 1, false},
-		{"hello3,0", "test_data/hello.b98", 3, 0, true},
-		{"hello3,1", "test_data/hello.b98", 3, 1, false},
-		{"factorial0,1", "test_data/factorial.b98", 0, 1, true},
-		{"factorial14,1", "test_data/factorial.b98", 14, 1, true},
-		{"factorial15,1", "test_data/factorial.b98", 15, 1, false},
-	}
-	for _, tc := range testCases {
-		t.Run(tc.name, func(t *testing.T) {
-			file, err := os.Open(tc.input)
-			require.NoError(t, err, "Failed to open file")
-			defer file.Close()
-			field, err := LoadFile(file)
-			valid := field.IsIn(tc.inputX, tc.inputY)
-			require.NoError(t, err)
-			require.Equal(t, tc.expected, valid, "Invalid value")
-		})
-	}
-}
diff --git a/pkg/field/utils.go b/pkg/field/utils.go
new file mode 100644
index 0000000..79a191b
--- /dev/null
+++ b/pkg/field/utils.go
@@ -0,0 +1,5 @@
+package field
+
+func (f Field) isIn(x, y int) bool {
+	return x >= f.x && x < f.x+f.lx && y >= f.y && y < f.y+f.ly
+}
diff --git a/pkg/field/utils_test.go b/pkg/field/utils_test.go
new file mode 100644
index 0000000..bcc8deb
--- /dev/null
+++ b/pkg/field/utils_test.go
@@ -0,0 +1,41 @@
+package field
+
+import (
+	"os"
+	"testing"
+
+	"github.com/stretchr/testify/require"
+)
+
+func TestIsIn(t *testing.T) {
+	// Test cases
+	testCases := []struct {
+		name     string
+		input    string
+		inputX   int
+		inputY   int
+		expected bool
+	}{
+		{"minimal0,0", "test_data/minimal.b98", 0, 0, true},
+		{"minimal-1,0", "test_data/minimal.b98", -1, 0, false},
+		{"minimal1,0", "test_data/minimal.b98", 1, 0, false},
+		{"minimal0,-1", "test_data/minimal.b98", 0, -1, false},
+		{"minimal0,1", "test_data/minimal.b98", 0, 1, false},
+		{"hello3,0", "test_data/hello.b98", 3, 0, true},
+		{"hello3,1", "test_data/hello.b98", 3, 1, false},
+		{"factorial0,1", "test_data/factorial.b98", 0, 1, true},
+		{"factorial14,1", "test_data/factorial.b98", 14, 1, true},
+		{"factorial15,1", "test_data/factorial.b98", 15, 1, false},
+	}
+	for _, tc := range testCases {
+		t.Run(tc.name, func(t *testing.T) {
+			file, err := os.Open(tc.input)
+			require.NoError(t, err, "Failed to open file")
+			defer file.Close()
+			field, err := LoadFile(file)
+			valid := field.isIn(tc.inputX, tc.inputY)
+			require.NoError(t, err)
+			require.Equal(t, tc.expected, valid, "Invalid value")
+		})
+	}
+}