diff --git a/README.md b/README.md
index 7fa3b5c..ef6d1ce 100644
--- a/README.md
+++ b/README.md
@@ -1,5 +1,9 @@
 # SVG Layout Designer React
 
+[![Build Status](https://drone.siklos-chaneru.duckdns.org/api/badges/Siklos/svg-layout-designer-react/status.svg)](https://drone.siklos-chaneru.duckdns.org/Siklos/svg-layout-designer-react)
+
+[![Build Status](https://drone.siklos-chaneru.duckdns.org/api/badges/Siklos/svg-layout-designer-react/status.svg?ref=refs/heads/dev)](https://drone.siklos-chaneru.duckdns.org/Siklos/svg-layout-designer-react)
+
 An svg layout designer.
 
 # Getting Started
diff --git a/src/App.tsx b/src/App.tsx
index 705e40d..263827b 100644
--- a/src/App.tsx
+++ b/src/App.tsx
@@ -100,8 +100,39 @@ export class App extends React.Component<IAppProps> {
           historyCurrentStep: 0,
           isLoaded: true
         });
-      }, (error) => { throw new Error(error); }
-      );
+      }, (error) => {
+        // TODO: Implement an alert component
+        console.warn('[NewEditor] Could not fetch resource from API. Returning default.', error);
+        const MainContainer = new ContainerModel(
+          null,
+          {
+            id: 'main',
+            parentId: 'null',
+            x: 0,
+            y: 0,
+            width: DEFAULT_CONFIG.MainContainer.Width,
+            height: DEFAULT_CONFIG.MainContainer.Height,
+            fillOpacity: DEFAULT_CONFIG.MainContainer.Style.fillOpacity,
+            stroke: DEFAULT_CONFIG.MainContainer.Style.stroke,
+          }
+        );
+
+        // Save the configuration and the new MainContainer
+        // and default the selected container to it
+        this.setState({
+          configuration: DEFAULT_CONFIG,
+          history:
+          [
+            {
+              MainContainer,
+              SelectedContainer: MainContainer,
+              TypeCounters: {}
+            }
+          ],
+          historyCurrentStep: 0,
+          isLoaded: true
+        });
+      });
   }
 
   public LoadEditor(files: FileList | null): void {
@@ -182,3 +213,28 @@ export async function fetchConfiguration(): Promise<Configuration> {
     xhr.send();
   });
 }
+
+
+const DEFAULT_CONFIG: Configuration = {
+  AvailableContainers: [
+    {
+      Type: 'Container',
+      Width: 75,
+      Height: 100,
+      Style: {
+        fillOpacity: 0,
+        stroke: 'green'
+      }
+    }
+  ],
+  AvailableSymbols: [],
+  MainContainer: {
+    Type: 'Container',
+    Width: 2000,
+    Height: 100,
+    Style: {
+      fillOpacity: 0,
+      stroke: 'black'
+    }
+  }
+}
diff --git a/src/Components/ElementsSidebar/ElementsSidebar.test.tsx b/src/Components/ElementsSidebar/ElementsSidebar.test.tsx
new file mode 100644
index 0000000..d52fe97
--- /dev/null
+++ b/src/Components/ElementsSidebar/ElementsSidebar.test.tsx
@@ -0,0 +1,242 @@
+import { describe, test, expect, vi } from 'vitest';
+import * as React from 'react';
+import { fireEvent, render, screen } from '../../utils/test-utils';
+import { ElementsSidebar } from './ElementsSidebar';
+import { IContainerModel } from '../../Interfaces/ContainerModel';
+
+describe.concurrent('Elements sidebar', () => {
+  it('No elements', () => {
+    render(<ElementsSidebar
+      MainContainer={null}
+      isOpen={true}
+      isHistoryOpen={false}
+      SelectedContainer={null}
+      onClick={() => {}}
+      onPropertyChange={() => {}}
+      selectContainer={() => {}}
+    />);
+
+    expect(screen.getByText(/Elements/i));
+    expect(screen.queryByText('id')).toBeNull();
+    expect(screen.queryByText(/main/i)).toBeNull();
+  });
+
+  it('With a MainContainer', () => {
+    render(<ElementsSidebar
+      MainContainer={{
+        children: [],
+        parent: null,
+        properties: {
+          id: 'main',
+          parentId: null,
+          x: 0,
+          y: 0,
+          width: 2000,
+          height: 100
+        },
+        userData: {}
+      }}
+      isOpen={true}
+      isHistoryOpen={false}
+      SelectedContainer={null}
+      onClick={() => {}}
+      onPropertyChange={() => {}}
+      selectContainer={() => {}}
+    />);
+
+    expect(screen.getByText(/Elements/i));
+    expect(screen.queryByText('id')).toBeNull();
+    expect(screen.getByText(/main/i));
+  });
+
+  it('With a selected MainContainer', () => {
+    const MainContainer = {
+      children: [],
+      parent: null,
+      properties: {
+        id: 'main',
+        parentId: '',
+        x: 0,
+        y: 0,
+        width: 2000,
+        height: 100
+      },
+      userData: {}
+    };
+
+    const { container } = render(<ElementsSidebar
+      MainContainer={MainContainer}
+      isOpen={true}
+      isHistoryOpen={false}
+      SelectedContainer={MainContainer}
+      onClick={() => {}}
+      onPropertyChange={() => {}}
+      selectContainer={() => {}}
+    />);
+
+    expect(screen.getByText(/Elements/i));
+    expect(screen.getByText(/main/i));
+    expect(screen.queryByText('id')).toBeDefined();
+    expect(screen.queryByText('parentId')).toBeDefined();
+    expect(screen.queryByText('x')).toBeDefined();
+    expect(screen.queryByText('y')).toBeDefined();
+    expect(screen.queryByText('width')).toBeDefined();
+    expect(screen.queryByText('height')).toBeDefined();
+    const propertyId = container.querySelector('#property-id');
+    const propertyParentId = container.querySelector('#property-parentId');
+    const propertyX = container.querySelector('#property-x');
+    const propertyY = container.querySelector('#property-y');
+    const propertyWidth = container.querySelector('#property-width');
+    const propertyHeight = container.querySelector('#property-height');
+    expect((propertyId as HTMLInputElement).value).toBe(MainContainer.properties.id.toString());
+    expect(propertyParentId).toBeDefined();
+    expect((propertyParentId as HTMLInputElement).value).toBe('');
+    expect(propertyX).toBeDefined();
+    expect((propertyX as HTMLInputElement).value).toBe(MainContainer.properties.x.toString());
+    expect(propertyY).toBeDefined();
+    expect((propertyY as HTMLInputElement).value).toBe(MainContainer.properties.y.toString());
+    expect(propertyWidth).toBeDefined();
+    expect((propertyWidth as HTMLInputElement).value).toBe(MainContainer.properties.width.toString());
+    expect(propertyHeight).toBeDefined();
+    expect((propertyHeight as HTMLInputElement).value).toBe(MainContainer.properties.height.toString());
+  });
+
+  it('With multiple containers', () => {
+    const children: IContainerModel[] = [];
+    const MainContainer = {
+      children,
+      parent: null,
+      properties: {
+        id: 'main',
+        parentId: '',
+        x: 0,
+        y: 0,
+        width: 2000,
+        height: 100
+      },
+      userData: {}
+    };
+
+    children.push(
+      {
+        children: [],
+        parent: MainContainer,
+        properties: {
+          id: 'child-1',
+          parentId: 'main',
+          x: 0,
+          y: 0,
+          width: 0,
+          height: 0
+        },
+        userData: {}
+      }
+    );
+
+    children.push(
+      {
+        children: [],
+        parent: MainContainer,
+        properties: {
+          id: 'child-2',
+          parentId: 'main',
+          x: 0,
+          y: 0,
+          width: 0,
+          height: 0
+        },
+        userData: {}
+      }
+    );
+
+    render(<ElementsSidebar
+      MainContainer={MainContainer}
+      isOpen={true}
+      isHistoryOpen={false}
+      SelectedContainer={MainContainer}
+      onClick={() => {}}
+      onPropertyChange={() => {}}
+      selectContainer={() => {}}
+    />);
+
+    expect(screen.getByText(/Elements/i));
+    expect(screen.queryByText('id')).toBeDefined();
+    expect(screen.getByText(/main/i));
+    expect(screen.getByText(/child-1/i));
+    expect(screen.getByText(/child-2/i));
+  });
+
+  it('With multiple containers, change selection', () => {
+    const children: IContainerModel[] = [];
+    const MainContainer: IContainerModel = {
+      children,
+      parent: null,
+      properties: {
+        id: 'main',
+        parentId: '',
+        x: 0,
+        y: 0,
+        width: 2000,
+        height: 100
+      },
+      userData: {}
+    };
+
+    const child1Model: IContainerModel = {
+      children: [],
+      parent: MainContainer,
+      properties: {
+        id: 'child-1',
+        parentId: 'main',
+        x: 0,
+        y: 0,
+        width: 0,
+        height: 0
+      },
+      userData: {}
+    };
+    children.push(child1Model);
+
+    let SelectedContainer = MainContainer;
+    const selectContainer = vi.fn((container: IContainerModel) => {
+      SelectedContainer = container;
+    });
+
+    const { container, rerender } = render(<ElementsSidebar
+      MainContainer={MainContainer}
+      isOpen={true}
+      isHistoryOpen={false}
+      SelectedContainer={SelectedContainer}
+      onClick={() => {}}
+      onPropertyChange={() => {}}
+      selectContainer={selectContainer}
+    />);
+
+    expect(screen.getByText(/Elements/i));
+    expect(screen.queryByText('id')).toBeDefined();
+    expect(screen.getByText(/main/i));
+    const child1 = screen.getByText(/child-1/i);
+    expect(child1);
+    const propertyId = container.querySelector('#property-id');
+    const propertyParentId = container.querySelector('#property-parentId');
+    expect((propertyId as HTMLInputElement).value).toBe(MainContainer.properties.id.toString());
+    expect((propertyParentId as HTMLInputElement).value).toBe('');
+
+    fireEvent.click(child1);
+
+    rerender(<ElementsSidebar
+      MainContainer={MainContainer}
+      isOpen={true}
+      isHistoryOpen={false}
+      SelectedContainer={SelectedContainer}
+      onClick={() => {}}
+      onPropertyChange={() => {}}
+      selectContainer={selectContainer}
+    />);
+
+    expect((propertyId as HTMLInputElement).value === 'main').toBeFalsy();
+    expect((propertyParentId as HTMLInputElement).value === '').toBeFalsy();
+    expect((propertyId as HTMLInputElement).value).toBe(child1Model.properties.id.toString());
+    expect((propertyParentId as HTMLInputElement).value).toBe(child1Model.properties.parentId?.toString());
+  });
+});
diff --git a/src/Components/Properties/Properties.test.tsx b/src/Components/Properties/Properties.test.tsx
new file mode 100644
index 0000000..1ce9d25
--- /dev/null
+++ b/src/Components/Properties/Properties.test.tsx
@@ -0,0 +1,82 @@
+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('id')).toBeNull();
+    expect(screen.queryByText('parentId')).toBeNull();
+    expect(screen.queryByText('x')).toBeNull();
+    expect(screen.queryByText('y')).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}
+    />);
+
+    expect(screen.queryByText('id')).toBeDefined();
+    expect(screen.queryByText('parentId')).toBeDefined();
+    expect(screen.queryByText('x')).toBeDefined();
+    expect(screen.queryByText('y')).toBeDefined();
+
+    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');
+  });
+});
diff --git a/src/Components/Sidebar/Sidebar.test.tsx b/src/Components/Sidebar/Sidebar.test.tsx
index c17f48e..8f283eb 100644
--- a/src/Components/Sidebar/Sidebar.test.tsx
+++ b/src/Components/Sidebar/Sidebar.test.tsx
@@ -1,19 +1,61 @@
 import * as React from 'react';
-import { describe, test, expect } from 'vitest';
-import { render, screen } from '../../utils/test-utils';
+import { describe, test, expect, vi } from 'vitest';
+import { findByText, fireEvent, render, screen } from '../../utils/test-utils';
 import Sidebar from './Sidebar';
 
-describe('Sidebar test', () => {
-  test('Start empty', () => {
+describe.concurrent('Sidebar', () => {
+  it('Start default', () => {
+    const handleClick = vi.fn();
     render(
       <Sidebar
         componentOptions={[]}
         isOpen={true}
-        onClick={() => {}}
+        onClick={handleClick}
         buttonOnClick={() => {}}
       />
     );
+    const stuff = screen.queryByText(/stuff/i);
+    const close = screen.getByText(/close/i);
 
-    expect(screen.getByText(/Components/i)).toBeDefined();
+    expect(screen.getByText(/Components/i).classList.contains('left-0')).toBeDefined();
+    expect(stuff).toBeNull();
+    fireEvent.click(close);
+    expect(handleClick).toHaveBeenCalledTimes(1);
+  });
+
+  it('Start close', () => {
+    render(<Sidebar
+      componentOptions={[]}
+      isOpen={false}
+      onClick={() => {}}
+      buttonOnClick={() => {}}
+    />);
+
+    const stuff = screen.queryByText(/stuff/i);
+    expect(screen.getByText(/Components/i).classList.contains('-left-64')).toBeDefined();
+    expect(stuff).toBeNull();
+  });
+
+  it('With stuff', () => {
+    const Type = 'stuff';
+    const handleButtonClick = vi.fn();
+    render(<Sidebar
+      componentOptions={[
+        {
+          Type,
+          Width: 30,
+          Height: 30,
+          Style: {}
+        }
+      ]}
+      isOpen={true}
+      onClick={() => {}}
+      buttonOnClick={handleButtonClick}
+    />);
+    const stuff = screen.getByText(/stuff/i);
+
+    expect(stuff).toBeDefined();
+    fireEvent.click(stuff);
+    expect(handleButtonClick).toHaveBeenCalledTimes(1);
   });
 });
diff --git a/src/Components/UI/UI.tsx b/src/Components/UI/UI.tsx
index 6476af5..7748c67 100644
--- a/src/Components/UI/UI.tsx
+++ b/src/Components/UI/UI.tsx
@@ -117,7 +117,7 @@ export class UI extends React.PureComponent<IUIProps, IUIState> {
             &#9776; History
         </button>
 
-        <FloatingButton className={`fixed flex flex-col gap-2 items-center bottom-40 ${buttonRightOffsetClasses}`}>
+        <FloatingButton className={`fixed z-10 flex flex-col gap-2 items-center bottom-40 ${buttonRightOffsetClasses}`}>
           <button
             className={'transition-all w-10 h-10 p-2 align-middle items-center justify-center rounded-full bg-blue-500 hover:bg-blue-800'}
             title='Export as JSON'
diff --git a/src/test/api.test.tsx b/src/test/api.test.tsx
index 19db6cc..ed3a996 100644
--- a/src/test/api.test.tsx
+++ b/src/test/api.test.tsx
@@ -1,13 +1,13 @@
-import { describe, test, expect } from 'vitest';
+import { describe, it, expect } from 'vitest';
 import { fetchConfiguration } from '../App';
 
-describe('API test', () => {
-  test('Load environment', () => {
+describe.concurrent('API test', () => {
+  it('Load environment', () => {
     const url = import.meta.env.VITE_API_URL;
     expect(url).toBe('http://localhost:5000');
   });
 
-  test('Fetch configuration', async() => {
+  it('Fetch configuration', async() => {
     const configuration = await fetchConfiguration();
     expect(configuration.MainContainer).toBeDefined();
     expect(configuration.MainContainer.Height).toBeGreaterThan(0);