chore: initialize from frontend template 4dc033c

tests/component/chunk-recovery-boundary.test.tsx

@@ -0,0 +1,68 @@
+// @vitest-environment jsdom
+
+import { render, screen } from "@testing-library/react";
+import { describe, expect, it, vi } from "vitest";
+
+import {
+  ChunkRecoveryBoundary,
+  isChunkLoadFailure,
+} from "../../src/presentation/boundaries/chunk-recovery-boundary.tsx";
+import { FeatureBoundary } from "../../src/presentation/boundaries/render-error-boundary.tsx";
+
+function ChunkDefect(): never {
+  throw new TypeError("Failed to fetch dynamically imported module");
+}
+
+function RenderDefect(): never {
+  throw new Error("ordinary render defect");
+}
+
+describe("chunk recovery boundary classification", () => {
+  it("recognizes lazy module failures without classifying ordinary render errors", () => {
+    expect(
+      isChunkLoadFailure(
+        new TypeError("Failed to fetch dynamically imported module"),
+      ),
+    ).toBe(true);
+    expect(isChunkLoadFailure(new Error("ordinary render defect"))).toBe(false);
+  });
+
+  it("runs the recovery input only for a lazy chunk rejection", async () => {
+    const recover = vi.fn(async () => ({
+      action: "support" as const,
+      reason: "reload-already-attempted",
+    }));
+    render(
+      <ChunkRecoveryBoundary chunkId="route-home" recover={recover}>
+        <ChunkDefect />
+      </ChunkRecoveryBoundary>,
+    );
+
+    expect(
+      await screen.findByRole("heading", {
+        name: "화면 자산을 복구하지 못했습니다.",
+      }),
+    ).toBeVisible();
+    expect(recover).toHaveBeenCalledOnce();
+    expect(recover).toHaveBeenCalledWith({
+      chunkId: "route-home",
+      failureKind: "CHUNK_LOAD_FAILURE",
+    });
+  });
+
+  it("rethrows an ordinary component defect to the local render boundary", () => {
+    const recover = vi.fn();
+    render(
+      <FeatureBoundary routeId="APP_HOME" buildId="build-a">
+        <ChunkRecoveryBoundary chunkId="route-home" recover={recover}>
+          <RenderDefect />
+        </ChunkRecoveryBoundary>
+      </FeatureBoundary>,
+    );
+
+    expect(screen.getByRole("alert")).toHaveTextContent(
+      "화면을 표시하지 못했습니다.",
+    );
+    expect(recover).not.toHaveBeenCalled();
+  });
+});