Initial commit

Signed-off-by: Ilan Bigio <ilan@openai.com>

codex-cli/tests/model-utils-network-error.test.ts

@@ -0,0 +1,70 @@
+import { describe, it, expect, vi, afterEach } from "vitest";
+
+// The model‑utils module reads OPENAI_API_KEY at import time. We therefore
+// need to tweak the env var *before* importing the module in each test and
+// make sure the module cache is cleared.
+
+const ORIGINAL_ENV_KEY = process.env["OPENAI_API_KEY"];
+
+// Holders so individual tests can adjust behaviour of the OpenAI mock.
+const openAiState: { listSpy?: ReturnType<typeof vi.fn> } = {};
+
+vi.mock("openai", () => {
+  class FakeOpenAI {
+    public models = {
+      // `listSpy` will be swapped out by the tests
+      list: (...args: Array<any>) => openAiState.listSpy!(...args),
+    };
+  }
+
+  return {
+    __esModule: true,
+    default: FakeOpenAI,
+  };
+});
+
+describe("model-utils – offline resilience", () => {
+  afterEach(() => {
+    // Restore env var & module cache so tests are isolated.
+    if (ORIGINAL_ENV_KEY !== undefined) {
+      process.env["OPENAI_API_KEY"] = ORIGINAL_ENV_KEY;
+    } else {
+      delete process.env["OPENAI_API_KEY"];
+    }
+    vi.resetModules();
+    openAiState.listSpy = undefined;
+  });
+
+  it("returns true when API key absent (no network available)", async () => {
+    delete process.env["OPENAI_API_KEY"];
+
+    // Re‑import after env change so the module picks up the new state.
+    vi.resetModules();
+    const { isModelSupportedForResponses } = await import(
+      "../src/utils/model-utils.js"
+    );
+
+    const supported = await isModelSupportedForResponses("o4-mini");
+    expect(supported).toBe(true);
+  });
+
+  it("falls back gracefully when openai.models.list throws a network error", async () => {
+    process.env["OPENAI_API_KEY"] = "dummy";
+
+    const netErr: any = new Error("socket hang up");
+    netErr.code = "ECONNRESET";
+
+    openAiState.listSpy = vi.fn(async () => {
+      throw netErr;
+    });
+
+    vi.resetModules();
+    const { isModelSupportedForResponses } = await import(
+      "../src/utils/model-utils.js"
+    );
+
+    // Should resolve true despite the network failure
+    const supported = await isModelSupportedForResponses("some-model");
+    expect(supported).toBe(true);
+  });
+});