diff --git a/src/app/cartography/map/helpers/in-rectangle-helper.spec.ts b/src/app/cartography/map/helpers/in-rectangle-helper.spec.ts
new file mode 100644
index 00000000..fa3e187a
--- /dev/null
+++ b/src/app/cartography/map/helpers/in-rectangle-helper.spec.ts
@@ -0,0 +1,29 @@
+import { InRectangleHelper } from "./in-rectangle-helper";
+import { Selectable } from "../../shared/managers/selection-manager";
+import { Rectangle } from "../../shared/models/rectangle";
+
+class ExampleNode implements Selectable {
+  constructor(public x: number, public y: number, public is_selected: boolean) {}
+}
+
+
+describe('InRectangleHelper', () => {
+  let inRectangleHelper: InRectangleHelper;
+  let node: Selectable;
+
+  beforeEach(() => {
+    inRectangleHelper = new InRectangleHelper();
+  });
+
+  it('should be in rectangle', () => {
+    node = new ExampleNode(100, 100, false);
+    const isIn = inRectangleHelper.inRectangle(node, new Rectangle(10, 10, 150, 150));
+    expect(isIn).toBeTruthy();
+  });
+
+  it('should be outside rectangle', () => {
+    node = new ExampleNode(100, 100, false);
+    const isIn = inRectangleHelper.inRectangle(node, new Rectangle(10, 10, 50, 50));
+    expect(isIn).toBeFalsy();
+  });
+});
diff --git a/src/app/cartography/map/helpers/in-rectangle-helper.ts b/src/app/cartography/map/helpers/in-rectangle-helper.ts
index 08c8936d..396de67d 100644
--- a/src/app/cartography/map/helpers/in-rectangle-helper.ts
+++ b/src/app/cartography/map/helpers/in-rectangle-helper.ts
@@ -1,6 +1,8 @@
-import {Selectable} from "../../shared/managers/selection-manager";
-import {Rectangle} from "../../shared/models/rectangle";
-import {Injectable} from "@angular/core";
+import { Injectable } from "@angular/core";
+
+import { Selectable } from "../../shared/managers/selection-manager";
+import { Rectangle } from "../../shared/models/rectangle";
+
 
 @Injectable()
 export class InRectangleHelper {