ADD a test for a serverside success & serverside fail checkRef

lib/api/src/tests/refs.test.js

@@ -538,7 +538,7 @@ describe('Refs API', () => {
       `);
     });
 
-    it('checks refs (cors)', async () => {
+    it('checks refs (serverside-success)', async () => {
       // given
       const { api } = initRefs({ provider, store }, { runCheck: false });
 
@@ -600,5 +600,93 @@ describe('Refs API', () => {
         }
       `);
     });
+
+    it('checks refs (serverside-fail)', async () => {
+      // given
+      const { api } = initRefs({ provider, store }, { runCheck: false });
+
+      setupResponses(
+        {
+          ok: false,
+          response: async () => {
+            throw new Error('Failed to fetch');
+          },
+        },
+        {
+          ok: false,
+          response: async () => {
+            throw new Error('Failed to fetch');
+          },
+        },
+        {
+          ok: true,
+          response: async () => {
+            throw new Error('not ok');
+          },
+        },
+        {
+          ok: false,
+          response: async () => {
+            throw new Error('Failed to fetch');
+          },
+        }
+      );
+
+      await api.checkRef({
+        id: 'fake',
+        url: 'https://example.com',
+        title: 'Fake',
+        type: 'unknown',
+      });
+
+      expect(fetch.mock.calls).toMatchInlineSnapshot(`
+        Array [
+          Array [
+            "https://example.com/stories.json",
+            Object {
+              "credentials": "include",
+              "headers": Object {
+                "Accept": "application/json",
+              },
+            },
+          ],
+          Array [
+            "https://example.com/stories.json",
+            Object {
+              "credentials": "omit",
+              "headers": Object {
+                "Accept": "application/json",
+              },
+            },
+          ],
+        ]
+      `);
+
+      expect(store.setState.mock.calls[0][0]).toMatchInlineSnapshot(`
+        Object {
+          "refs": Object {
+            "fake": Object {
+              "error": Object {
+                "message": "Error: Loading of ref failed
+          at fetch (lib/api/src/modules/refs.ts)
+
+        URL: https://example.com
+
+        We weren't able to load the above URL,
+        it's possible a CORS error happened.
+
+        Please check your dev-tools network tab.",
+              },
+              "id": "fake",
+              "ready": false,
+              "stories": undefined,
+              "title": "Fake",
+              "type": "auto-inject",
+              "url": "https://example.com",
+            },
+          },
+        }
+      `);
+    });
   });
 });