Repro: App crashes when editing custom expression referencing metric when...

 Repro: App crashes when editing custom expression referencing metric when dependent metadata is not loaded (#48560)

* Add repro for #47058

* Delay the response and test for the actual metric button

* Move setup to before and find summarize block using helper

* Use beforeEach

e2e/test/scenarios/metrics/reproductions/metrics-reproductions.cy.spec.ts

+import { SAMPLE_DATABASE } from "e2e/support/cypress_sample_database";
+import {
+  createQuestion,
+  getNotebookStep,
+  main,
+  restore,
+} from "e2e/support/helpers";
+
+const { ORDERS_ID, ORDERS } = SAMPLE_DATABASE;
+
+describe("issue 47058", () => {
+  beforeEach(() => {
+    restore();
+    cy.signInAsNormalUser();
+    cy.intercept("GET", "/api/card/*/query_metadata", req =>
+      req.continue(() => new Promise(resolve => setTimeout(resolve, 1000))),
+    ).as("metadata");
+
+    createQuestion({
+      name: "Metric 47058",
+      type: "metric",
+      query: {
+        "source-table": ORDERS_ID,
+        aggregation: [["count"]],
+      },
+    }).then(({ body: { id: metricId } }) => {
+      createQuestion({
+        name: "Question 47058",
+        type: "question",
+        query: {
+          "source-table": ORDERS_ID,
+          fields: [
+            ["field", ORDERS.ID, {}],
+            ["field", ORDERS.TOTAL, {}],
+          ],
+          aggregation: [["metric", metricId]],
+          limit: 1,
+        },
+      }).then(({ body: { id: questionId } }) => {
+        cy.visit(`/question/${questionId}/notebook`);
+      });
+    });
+  });
+
+  it("should show the loading page while the question metadata is being fetched (metabase#47058)", () => {
+    main().within(() => {
+      cy.findByText("Loading...").should("be.visible");
+      getNotebookStep("summarize").should("not.exist");
+
+      cy.findByText("[Unknown Metric]").should("not.exist");
+
+      cy.wait("@metadata");
+      cy.log(
+        "Only renders the notebook editor (with the summarize button that has the metrics' name on it) after the metadata is loaded",
+      );
+
+      cy.findByText("Loading...").should("not.exist");
+      getNotebookStep("summarize").should("be.visible");
+
+      cy.findByText("[Unknown Metric]").should("not.exist");
+    });
+  });
+});