tests: add code tests

tests/unit/components/code.test.ts

@@ -0,0 +1,47 @@
+import '@testing-library/jest-dom';
+import { fireEvent, render } from '@testing-library/svelte';
+import { vi } from 'vitest';
+import { Code } from '../../../src/lib/components';
+
+test('shows code highlighted javascript', async () => {
+    const { container } = render(Code, {
+        code: 'console.log("test");',
+        language: 'js'
+    });
+
+    expect(container.querySelectorAll('.token.function').length).toEqual(1);
+    expect(container.querySelectorAll('.token.string').length).toEqual(1);
+    expect(container.querySelectorAll('.token.punctuation').length).toEqual(4);
+});
+
+test('shows code highlighted json', async () => {
+    const { container } = render(Code, {
+        code: JSON.stringify({ key: 'value' }),
+        language: 'json'
+    });
+    console.log(container.innerHTML);
+    expect(container.querySelectorAll('.token.property').length).toEqual(1);
+    expect(container.querySelectorAll('.token.operator').length).toEqual(1);
+    expect(container.querySelectorAll('.token.string').length).toEqual(1);
+    expect(container.querySelectorAll('.token.punctuation').length).toEqual(2);
+});
+
+test('copy to clipboard function called on click', async () => {
+    const { container } = render(Code, {
+        code: 'console.log("test");',
+        language: 'js',
+        showCopy: true
+    });
+
+    Object.assign(window.navigator, {
+        clipboard: {
+            writeText: vi.fn().mockImplementation(() => Promise.resolve())
+        }
+    });
+
+    const button = container.querySelector('.icon-duplicate');
+
+    await fireEvent.click(button);
+
+    expect(window.navigator.clipboard.writeText).toHaveBeenCalledWith('console.log("test");');
+});