feat/e2e-testing (#31)

Reviewed-on: #31
Co-authored-by: Max Richter <max@max-richter.dev>
Co-committed-by: Max Richter <max@max-richter.dev>

packages/ui/src/lib/inputs/InputNumber.svelte.ts

@@ -0,0 +1,45 @@
+import { describe, expect, it } from 'vitest';
+import { render } from 'vitest-browser-svelte';
+import { page } from 'vitest/browser';
+import InputNumber from './InputNumber.svelte';
+
+describe('InputNumber', () => {
+  it('should render input element', async () => {
+    render(InputNumber, { value: 0.5 });
+
+    const input = page.getByRole('spinbutton');
+    await expect.element(input).toBeInTheDocument();
+  });
+
+  it('should render with step buttons when step is provided', async () => {
+    render(InputNumber, { value: 0.5, step: 0.1 });
+
+    const decrementBtn = page.getByRole('button', { name: 'step down' });
+    const incrementBtn = page.getByRole('button', { name: 'step up' });
+    await expect.element(decrementBtn).toBeInTheDocument();
+    await expect.element(incrementBtn).toBeInTheDocument();
+  });
+
+  it('should not render step buttons when step is undefined', async () => {
+    const screen = render(InputNumber, { value: 0.5 });
+
+    const buttons = screen.locator.getByRole('button');
+    const count = buttons.all().length;
+    expect(count).toBe(0);
+  });
+
+  it('should accept numeric value', async () => {
+    render(InputNumber, { value: 42 });
+
+    const input = page.getByRole('spinbutton');
+    await expect.element(input).toHaveValue(42);
+  });
+
+  it('should accept min and max bounds', async () => {
+    render(InputNumber, { value: 5, min: 0, max: 10 });
+
+    const input = page.getByRole('spinbutton');
+    await expect.element(input).toHaveAttribute('min', '0');
+    await expect.element(input).toHaveAttribute('max', '10');
+  });
+});