test: add basic testing for SubmissionsTable

- With the complex data testing the values render as expected has been strenuous
- Could be a good candidate for parameterization or snapshot testing potentially
- Will revisit when the table view is more stable

editor.planx.uk/src/pages/FlowEditor/components/Settings/Submissions/SubmissionsTable.test.tsx

@@ -0,0 +1,29 @@
+import React from "react";
+import { axe, setup } from "testUtils";
+
+import { mockApplications } from "./mocks";
+import SubmissionsTable from "./SubmissionsTable";
+
+describe("SubmissionsTable renders as expected", () => {
+  test("renders expected table headers", () => {
+    const { getByText } = setup(
+      <SubmissionsTable applications={mockApplications} />,
+    );
+    expect(getByText("Session ID")).toBeInTheDocument();
+    expect(getByText("Submitted At")).toBeInTheDocument();
+    expect(getByText("Payment Requests")).toBeInTheDocument();
+    expect(getByText("Payment Status")).toBeInTheDocument();
+    expect(getByText("BOPS Applications")).toBeInTheDocument();
+    expect(getByText("Uniform Applications")).toBeInTheDocument();
+    expect(getByText("Email Applications")).toBeInTheDocument();
+  });
+
+  test("renders with no accessibility violations", async () => {
+    const { container } = setup(
+      <SubmissionsTable applications={mockApplications} />,
+    );
+
+    const results = await axe(container);
+    expect(results).toHaveNoViolations();
+  });
+});