chore: import upstream snapshot with attribution

tests/unit/error-classifier.test.ts

@@ -0,0 +1,122 @@
+import test from "node:test";
+import assert from "node:assert/strict";
+
+const { classifyProviderError, PROVIDER_ERROR_TYPES } =
+  await import("../../open-sse/services/errorClassifier.ts");
+
+test("classifyProviderError: 401 + account_deactivated => ACCOUNT_DEACTIVATED", () => {
+  const body = JSON.stringify({
+    error: { message: "account_deactivated: this account has been disabled" },
+  });
+  const result = classifyProviderError(401, body);
+  assert.equal(result, PROVIDER_ERROR_TYPES.ACCOUNT_DEACTIVATED);
+});
+
+test("classifyProviderError: plain 401 => UNAUTHORIZED", () => {
+  const result = classifyProviderError(401, { error: { message: "token expired" } });
+  assert.equal(result, PROVIDER_ERROR_TYPES.UNAUTHORIZED);
+});
+
+test("classifyProviderError: 402 => QUOTA_EXHAUSTED", () => {
+  const result = classifyProviderError(402, { error: { message: "payment required" } });
+  assert.equal(result, PROVIDER_ERROR_TYPES.QUOTA_EXHAUSTED);
+});
+
+test("classifyProviderError: 400 + billing signal => QUOTA_EXHAUSTED", () => {
+  const result = classifyProviderError(400, {
+    error: { message: "insufficient_quota: exceeded your current quota" },
+  });
+  assert.equal(result, PROVIDER_ERROR_TYPES.QUOTA_EXHAUSTED);
+});
+
+test("classifyProviderError: 429 without billing signal => RATE_LIMITED", () => {
+  const result = classifyProviderError(429, { error: { message: "too many requests" } });
+  assert.equal(result, PROVIDER_ERROR_TYPES.RATE_LIMITED);
+});
+
+test("classifyProviderError: 429 with billing signal and no provider keeps legacy QUOTA_EXHAUSTED", () => {
+  const result = classifyProviderError(429, {
+    error: { message: "insufficient_quota: exceeded your current quota" },
+  });
+  assert.equal(result, PROVIDER_ERROR_TYPES.QUOTA_EXHAUSTED);
+});
+
+test("classifyProviderError: API-key provider 429 with billing signal => RATE_LIMITED", () => {
+  const result = classifyProviderError(
+    429,
+    {
+      error: { message: "insufficient_quota: exceeded your current quota" },
+    },
+    "openai"
+  );
+  assert.equal(result, PROVIDER_ERROR_TYPES.RATE_LIMITED);
+});
+
+test("classifyProviderError: OAuth provider 429 with billing signal => QUOTA_EXHAUSTED", () => {
+  const result = classifyProviderError(
+    429,
+    {
+      error: { message: "insufficient_quota: exceeded your current quota" },
+    },
+    "codex"
+  );
+  assert.equal(result, PROVIDER_ERROR_TYPES.QUOTA_EXHAUSTED);
+});
+
+test("classifyProviderError: 403 with 'has not been used in project' => PROJECT_ROUTE_ERROR (transient)", () => {
+  const result = classifyProviderError(403, {
+    error: {
+      message:
+        "Cloud Code Private API has not been used in project 12345 before or it is disabled.",
+    },
+  });
+  assert.equal(result, PROVIDER_ERROR_TYPES.PROJECT_ROUTE_ERROR);
+});
+
+test("classifyProviderError: 403 plain => FORBIDDEN (terminal)", () => {
+  const result = classifyProviderError(403, {
+    error: { message: "The caller does not have permission" },
+  });
+  assert.equal(result, PROVIDER_ERROR_TYPES.FORBIDDEN);
+});
+
+test("classifyProviderError: API-key provider plain 403 is recoverable", () => {
+  const result = classifyProviderError(
+    403,
+    {
+      error: { message: "The caller does not have permission" },
+    },
+    "glm"
+  );
+  assert.equal(result, null);
+});
+
+test("classifyProviderError: 403 with project string as plain string body => PROJECT_ROUTE_ERROR", () => {
+  const body = JSON.stringify({
+    error: { message: "API has not been used in project abc-xyz before" },
+  });
+  const result = classifyProviderError(403, body);
+  assert.equal(result, PROVIDER_ERROR_TYPES.PROJECT_ROUTE_ERROR);
+});
+
+test("classifyProviderError: API-key provider 429 with daily quota signal => RATE_LIMITED", () => {
+  const body = JSON.stringify({
+    error: {
+      message:
+        "You have exceeded today's quota for model moonshotai/Kimi-K2.5, please try again tomorrow",
+    },
+  });
+  const result = classifyProviderError(429, body, "openai");
+  assert.equal(result, PROVIDER_ERROR_TYPES.RATE_LIMITED);
+});
+
+test("classifyProviderError: OAuth provider 429 with daily quota signal => QUOTA_EXHAUSTED", () => {
+  const result = classifyProviderError(
+    429,
+    {
+      error: { message: "You have reached your daily quota limit" },
+    },
+    "codex"
+  );
+  assert.equal(result, PROVIDER_ERROR_TYPES.QUOTA_EXHAUSTED);
+});