test: checking right value is returned from new function

src/components/formcomponents/attachment/__tests__/attachment-spec.tsx

@@ -0,0 +1,21 @@
+import { QuestionnaireItem } from '../../../../types/fhir';
+import { getMaxSizeExtensionValue } from '../../../../util/extension';
+
+describe('Attachment form component', () => {
+  const question: QuestionnaireItem = {
+    linkId: '4c71df6e-d743-46ba-d81f-f62777ffddb4',
+    type: 'attachment',
+    text: '5mb',
+    extension: [
+      {
+        url: 'http://hl7.org/fhir/StructureDefinition/maxSize',
+        valueDecimal: 5,
+      },
+    ],
+  };
+  it('Should give back right value in MB',
+    () => {
+      const test = getMaxSizeExtensionValue(question);
+      expect(test).toBe(5);
+    });
+});