Merge 27d5eff771 into 9453c8c0c9

test/e2e/dns-failure-resilience.e2e.spec.js

@@ -0,0 +1,54 @@
+import { describe, it, before, beforeEach, afterEach } from "node:test";
+import { DockerTestContainer } from "./DockerTestContainer.js";
+import assert from "node:assert";
+
+describe("E2E: DNS failure resilience", () => {
+  let container;
+
+  before(async () => {
+    DockerTestContainer.buildImage();
+  });
+
+  beforeEach(async () => {
+    container = new DockerTestContainer();
+    await container.start();
+
+    const installationShell = await container.openShell("zsh");
+    await installationShell.runCommand("safe-chain setup");
+  });
+
+  afterEach(async () => {
+    if (container) {
+      await container.stop();
+      container = null;
+    }
+  });
+
+  it("should not crash when the npm registry is unreachable", async () => {
+    const shell = await container.openShell("zsh");
+
+    // Make the npm registry domain unreachable.
+    // `npm install lodash` talks to https://registry.npmjs.org/ for both metadata and tarballs.
+    await shell.runCommand(
+      'echo "127.0.0.1 registry.npmjs.org" >> /etc/hosts'
+    );
+
+    const result = await shell.runCommand(
+      // Fail fast so the shell runner doesn't time out.
+      // Also disable extra network calls that could introduce noise.
+      "npm install lodash --no-audit --no-fund --fetch-retries=0 --fetch-timeout=2000 --safe-chain-logging=verbose"
+    );
+
+    assert.ok(
+      result.output.includes("registry.npmjs.org"),
+      `Output did not reference the npm registry host; /etc/hosts override may not have applied. Output was:\n${result.output}`
+    );
+
+    // Ensure it did NOT crash with Unhandled Promise Rejection
+    assert.strictEqual(
+      result.output.includes("Unhandled promise rejection"),
+      false,
+      `Output indicates process crash (Unhandled promise rejection). Output was:\n${result.output}`
+    );
+  });
+});