Added test for properties

src/Components/Properties/Properties.test.tsx

@@ -0,0 +1,75 @@
+import { fireEvent, render, screen } from '@testing-library/react';
+import * as React from 'react';
+import { describe, it, vi } from 'vitest';
+import { Properties } from './Properties';
+
+describe.concurrent('Properties', () => {
+  it('No properties', () => {
+    render(<Properties
+      properties={undefined}
+      onChange={() => {}}
+    />);
+
+    expect(screen.queryByText(/property-/i)).toBeNull();
+  });
+
+  it('Some properties', () => {
+    const prop = {
+      id: 'stuff',
+      parentId: 'parentId',
+      x: 1,
+      y: 1
+    };
+
+    const handleChange = vi.fn((key, value) => {
+      (prop as any)[key] = value;
+    });
+
+    const { container, rerender } = render(<Properties
+      properties={prop}
+      onChange={handleChange}
+    />);
+
+    let propertyId = container.querySelector('#property-id');
+    let propertyParentId = container.querySelector('#property-parentId');
+    let propertyX = container.querySelector('#property-x');
+    let propertyY = container.querySelector('#property-y');
+    expect(propertyId).toBeDefined();
+    expect((propertyId as HTMLInputElement).value).toBe('stuff');
+    expect(propertyParentId).toBeDefined();
+    expect((propertyParentId as HTMLInputElement).value).toBe('parentId');
+    expect(propertyX).toBeDefined();
+    expect((propertyX as HTMLInputElement).value).toBe('1');
+    expect(propertyY).toBeDefined();
+    expect((propertyY as HTMLInputElement).value).toBe('1');
+
+    fireEvent.change(propertyId as Element, { target: { value: 'stuffed' } });
+    fireEvent.change(propertyParentId as Element, { target: { value: 'parentedId' } });
+    fireEvent.change(propertyX as Element, { target: { value: '2' } });
+    fireEvent.change(propertyY as Element, { target: { value: '2' } });
+    expect(handleChange).toBeCalledTimes(4);
+
+    expect(prop.id).toBe('stuffed');
+    expect(prop.parentId).toBe('parentedId');
+    expect(prop.x).toBe('2');
+    expect(prop.y).toBe('2');
+    rerender(<Properties
+      properties={Object.assign({}, prop)}
+      onChange={handleChange}
+    />);
+
+
+    propertyId = container.querySelector('#property-id');
+    propertyParentId = container.querySelector('#property-parentId');
+    propertyX = container.querySelector('#property-x');
+    propertyY = container.querySelector('#property-y');
+    expect(propertyId).toBeDefined();
+    expect((propertyId as HTMLInputElement).value).toBe('stuffed');
+    expect(propertyParentId).toBeDefined();
+    expect((propertyParentId as HTMLInputElement).value).toBe('parentedId');
+    expect(propertyX).toBeDefined();
+    expect((propertyX as HTMLInputElement).value).toBe('2');
+    expect(propertyY).toBeDefined();
+    expect((propertyY as HTMLInputElement).value).toBe('2');
+  });
+});