fix(compass-crud): don't show negative count on delete when no document count COMPASS-5996 (#3961)

Author: Anemy

packages/compass-crud/src/stores/crud-store.spec.ts

@@ -456,6 +456,7 @@ describe('store', function () {
         },
         actions: actions,
         namespace: 'compass-crud.test',
+        noRefreshOnConfigure: true,
       });
     });
 
@@ -505,6 +506,29 @@ describe('store', function () {
       });
     });
 
+    context('when the count is null', function () {
+      const doc = { _id: null, name: 'Depeche Mode' };
+      const hadronDoc = new HadronDocument(doc);
+
+      beforeEach(function () {
+        store.state.docs = [hadronDoc];
+        store.state.count = null;
+        store.state.end = 1;
+      });
+
+      it('keeps the count as null after the delete', async function () {
+        const listener = waitForState(store, (state) => {
+          expect(state.docs.length).to.equal(0);
+          expect(state.count).to.equal(null);
+          expect(state.end).to.equal(0);
+        });
+
+        store.removeDocument(hadronDoc);
+
+        await listener;
+      });
+    });
+
     context('when the deletion errors', function () {
       const doc = { _id: 'testing', name: 'Depeche Mode' };
       const hadronDoc = new HadronDocument(doc);

packages/compass-crud/src/stores/crud-store.ts

@@ -540,7 +540,7 @@ class CrudStoreImpl
           const index = this.findDocumentIndex(doc);
           this.state.docs?.splice(index, 1);
           this.setState({
-            count: (this.state.count ?? 1) - 1,
+            count: this.state.count === null ? null : this.state.count - 1,
             end: Math.max(this.state.end - 1, 0),
           });
         }