add initial tests

src/components/color-picker/color-picker.test.ts

@@ -0,0 +1,43 @@
+import { expect, fixture, html, waitUntil } from '@open-wc/testing';
+import sinon from 'sinon';
+
+import '../../../dist/shoelace.js';
+import type SlColorPicker from './color-picker';
+
+describe('<sl-color-picker>', () => {
+  it('should emit change and show correct color when the value changes', async () => {
+    const el = (await fixture(html` <sl-color-picker></sl-color-picker> `)) as SlColorPicker;
+    const trigger = el.shadowRoot.querySelector('[part="trigger"]') as HTMLElement;
+    const changeHandler = sinon.spy();
+    const color = 'rgb(255, 204, 0)';
+
+    el.addEventListener('sl-change', changeHandler);
+    el.value = color;
+
+    await waitUntil(() => changeHandler.calledOnce);
+
+    expect(changeHandler).to.have.been.calledOnce;
+    expect(trigger.style.color).to.equal(color);
+  });
+
+  it('should render in a dropdown', async () => {
+    const el = (await fixture(html` <sl-color-picker></sl-color-picker> `)) as SlColorPicker;
+    const dropdown = el.shadowRoot.querySelector('sl-dropdown');
+
+    expect(dropdown).to.exist;
+  });
+
+  it('should not render in a dropdown when inline is enabled', async () => {
+    const el = (await fixture(html` <sl-color-picker inline></sl-color-picker> `)) as SlColorPicker;
+    const dropdown = el.shadowRoot.querySelector('sl-dropdown');
+
+    expect(dropdown).to.not.exist;
+  });
+
+  it('should show opacity slider when opacity is enabled', async () => {
+    const el = (await fixture(html` <sl-color-picker opacity></sl-color-picker> `)) as SlColorPicker;
+    const opacitySlider = el.shadowRoot.querySelector('[part*="opacity-slider"]') as HTMLElement;
+
+    expect(opacitySlider).to.exist;
+  });
+});