Repro #24839: Can't aggregate if source is the aggregated question (#27396)

frontend/test/metabase/scenarios/question/reproductions/24839-summarize-source-question-with-summarization.cy.spec.js

+import { restore, visitQuestionAdhoc, popover } from "__support__/e2e/helpers";
+import { SAMPLE_DB_ID } from "__support__/e2e/cypress_data";
+import { SAMPLE_DATABASE } from "__support__/e2e/cypress_sample_database";
+
+const { ORDERS, ORDERS_ID } = SAMPLE_DATABASE;
+
+const questionDetails = {
+  name: "24839",
+  query: {
+    "source-table": ORDERS_ID,
+    aggregation: [
+      ["sum", ["field", ORDERS.QUANTITY, null]],
+      ["avg", ["field", ORDERS.TOTAL, null]],
+    ],
+    breakout: [["field", ORDERS.CREATED_AT, { "temporal-unit": "month" }]],
+  },
+  display: "line",
+};
+
+describe("issue 24839: should be able to summarize a nested question based on the source question with aggregations (metabase#24839)", () => {
+  beforeEach(() => {
+    restore();
+    cy.signInAsAdmin();
+
+    cy.createQuestion(questionDetails).then(({ body: { id } }) => {
+      // Start ad-hoc nested question based on the saved one
+      visitQuestionAdhoc({
+        dataset_query: {
+          database: SAMPLE_DB_ID,
+          query: { "source-table": `card__${id}` },
+          type: "query",
+        },
+      });
+    });
+  });
+
+  it.skip("from the notebook GUI (metabase#24839-1)", () => {
+    cy.icon("notebook").click();
+    cy.findByText("Summarize").click();
+    cy.findByText("Sum of ...").click();
+    popover()
+      .should("contain", "Sum of Quantity")
+      .and("contain", "Average of Total");
+  });
+
+  it("from a table header cell (metabase#24839-2)", () => {
+    cy.findAllByTestId("header-cell").contains("Average of Total").click();
+
+    popover().contains("Distinct values").click();
+
+    cy.get(".ScalarValue").invoke("text").should("eq", "49");
+
+    cy.findByTestId("aggregation-item")
+      .invoke("text")
+      .should("eq", "Distinct values of Average of Total");
+  });
+});