refactor: edge and rectangle in separate packages

cmd/09/rectangle/rectangle_test.go

@@ -0,0 +1,105 @@
+package rectangle_test
+
+import (
+	"slices"
+	"testing"
+
+	"github.com/StevanFreeborn/advent-of-code-2025/cmd/09/rectangle"
+	"github.com/StevanFreeborn/advent-of-code-2025/internal/position"
+)
+
+func TestFrom(t *testing.T) {
+	cornerOne := position.From(1, 2)
+	cornerTwo := position.From(3, 4)
+
+	expectedCorners := []position.Position{
+		cornerOne,
+		cornerTwo,
+		position.From(1, 4),
+		position.From(3, 2),
+	}
+
+	result := rectangle.From(cornerOne, cornerTwo)
+
+	if slices.Equal(result.Corners(), expectedCorners) == false {
+		t.Errorf("Expected corners %v, but got %v", expectedCorners, result.Corners())
+	}
+}
+
+func TestMaxRow(t *testing.T) {
+	expectedMaxRow := 3
+
+	cornerOne := position.From(1, 2)
+	cornerTwo := position.From(3, 4)
+
+	result := rectangle.From(cornerOne, cornerTwo).MaxRow()
+
+	if result != expectedMaxRow {
+		t.Errorf("Expected max row %d, but got %d", expectedMaxRow, result)
+	}
+}
+
+func TestMinRow(t *testing.T) {
+	expectedMinRow := 1
+
+	cornerOne := position.From(1, 2)
+	cornerTwo := position.From(3, 4)
+
+	result := rectangle.From(cornerOne, cornerTwo).MinRow()
+
+	if result != expectedMinRow {
+		t.Errorf("Expected min row %d, but got %d", expectedMinRow, result)
+	}
+}
+
+func TestMaxColumn(t *testing.T) {
+	expectedMaxColumn := 4
+
+	cornerOne := position.From(1, 2)
+	cornerTwo := position.From(3, 4)
+
+	result := rectangle.From(cornerOne, cornerTwo).MaxColumn()
+
+	if result != expectedMaxColumn {
+		t.Errorf("Expected max column %d, but got %d", expectedMaxColumn, result)
+	}
+}
+
+func TestMinColumn(t *testing.T) {
+	expectedMinColumn := 2
+
+	cornerOne := position.From(1, 2)
+	cornerTwo := position.From(3, 4)
+
+	result := rectangle.From(cornerOne, cornerTwo).MinColumn()
+
+	if result != expectedMinColumn {
+		t.Errorf("Expected min column %d, but got %d", expectedMinColumn, result)
+	}
+}
+
+func TestArea(t *testing.T) {
+	expectedArea := 9
+
+	cornerOne := position.From(1, 2)
+	cornerTwo := position.From(3, 4)
+
+	result := rectangle.From(cornerOne, cornerTwo).Area()
+
+	if result != expectedArea {
+		t.Errorf("Expected area %d, but got %d", expectedArea, result)
+	}
+}
+
+func TestCenter(t *testing.T) {
+	expectedCenter := position.From(2, 3)
+
+	cornerOne := position.From(1, 2)
+	cornerTwo := position.From(3, 4)
+
+	result := rectangle.From(cornerOne, cornerTwo).Center()
+
+	if result != expectedCenter {
+		t.Errorf("Expected center %v, but got %v", expectedCenter, result)
+	}
+}