feat(viewer): schema linking renders a Mermaid erDiagram (tables + relations)

2026-07-03 13:09:09 +02:00
parent 168a72372b
commit 893e9e4059
2 changed files with 43 additions and 15 deletions
@@ -1,6 +1,6 @@
 import { render, screen, waitFor } from "@testing-library/react";
 import userEvent from "@testing-library/user-event";
-import { SchemaLinkingViewer } from "./SchemaLinkingViewer";
+import { SchemaLinkingViewer, buildErDiagram } from "./SchemaLinkingViewer";

 vi.mock("./mermaid", () => ({
  renderMermaid: vi.fn().mockResolvedValue('<svg data-testid="mm"></svg>'),
@@ -82,3 +82,18 @@ test("(d) ~10 promoted + ~50 excluded does NOT cap; graph is available", async (
  // Grafico (mermaid) view is the default and renders the mocked svg.
  await waitFor(() => expect(screen.getByTestId("mm")).toBeInTheDocument());
 });
+
+test("(e) buildErDiagram emits entities, attributes and a relation", () => {
+  const def = buildErDiagram(
+    [
+      { kind: "table", name: "orders", decision: "promoted" },
+      { kind: "column", name: "orders.id", decision: "promoted" },
+      { kind: "table", name: "customers", decision: "promoted" },
+    ],
+    [{ from: "orders.customer_id", to: "customers.id" }],
+  );
+  expect(def.startsWith("erDiagram")).toBe(true);
+  expect(def).toContain("orders {");
+  expect(def).toContain("col id");
+  expect(def).toContain("orders }o--o{ customers : join");
+});