[Feature] Add unit test for RNANews (#14)

* Implement test for loading RNANews
* Implement test for RNANews response validation

test/unit-tests/RNANews/RNANewsConverter.test.ts

@@ -0,0 +1,61 @@
+import * as Assert from 'node:assert/strict';
+import * as MC from '../../../code/connectors-morningstar.src';
+import RNANewsJSON from '../../../src/RNANews/RNANewsJSON';
+
+export async function rnaNewsLoad (
+    api: MC.Shared.MorningstarAPIOptions
+) {
+    const connector = new MC.RNANewsConnector({
+      api,
+      security: {
+        id: 'GB00BLGZ9862',
+        idType: 'ISIN'
+      },
+      startDate: '2023-05-13',
+      endDate: '2023-05-23'
+    });
+
+    Assert.ok(
+        connector instanceof MC.RNANewsConnector,
+        'Connector should be instance of RNANewsConnector class.'
+    );
+
+    Assert.ok(
+        connector.converter instanceof
+        MC.RNANewsConverter,
+        'Converter should be instance of RNANewsConverter.'
+    );
+
+    await connector.load();
+
+    Assert.deepStrictEqual(
+        connector.table.getColumnNames(),
+        ['Day', 'Title', 'Source', 'Type'],
+        'Connector table should exist of expected columns.'
+    );
+
+    Assert.strictEqual(
+        connector.table.getRowCount(),
+        10,
+        'Connector table should have one expected dividend row.'
+    );
+
+}
+
+export function rnaNewsValidation () {
+
+  const day = '1723766400000';
+  const item = ['LSE20240816070005_5311334', 'Transaction in Own Shares', 'RNS', 'POS'];
+
+  const mockResponse = [
+    {
+      day: day,
+      items: [item]
+    }
+  ];
+
+  Assert.ok(
+    RNANewsJSON.isResponse(mockResponse),
+    'Mock response should be considered a valid response'
+  );
+}