test: add tests for translated-icon-button

Signed-off-by: Philip Molares <philip.molares@udo.edu>

src/components/common/icon-button/__snapshots__/translated-icon-button.test.tsx.snap

@@ -0,0 +1,24 @@
+// Jest Snapshot v1, https://goo.gl/fbAQLP
+
+exports[`TranslatedIconButton renders heart icon with i18nKey 1`] = `
+<div>
+  <button
+    class="btn-icon p-0 d-inline-flex align-items-stretch   btn btn-primary"
+    data-testid="icon-button"
+    type="button"
+  >
+    <span
+      class="icon-part d-flex align-items-center"
+    >
+      <i
+        class="fa  fa-heart icon "
+      />
+    </span>
+    <span
+      class="text-part d-flex align-items-center"
+    >
+      testi18nKey
+    </span>
+  </button>
+</div>
+`;

src/components/common/icon-button/translated-icon-button.test.tsx

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+/*
+ * SPDX-FileCopyrightText: 2022 The HedgeDoc developers (see AUTHORS file)
+ *
+ * SPDX-License-Identifier: AGPL-3.0-only
+ */
+
+import { mockI18n } from '../../markdown-renderer/test-utils/mock-i18n'
+import { render } from '@testing-library/react'
+import { TranslatedIconButton } from './translated-icon-button'
+
+describe('TranslatedIconButton', () => {
+  it('renders heart icon with i18nKey', async () => {
+    await mockI18n()
+    const view = render(<TranslatedIconButton i18nKey={'testi18nKey'} icon={'heart'} />)
+    expect(view.container).toMatchSnapshot()
+  })
+})