From 7236f650f6b6d4126f98fa1a9f64620d89f0421d Mon Sep 17 00:00:00 2001
From: Jeff Jagoda <jeff.jagoda@lifeomic.com>
Date: Tue, 29 Jun 2021 08:45:03 -0400
Subject: [PATCH] Throw original error on network error

Axios errors do not contain a `response` attribute when there is
no response (ex. network errors).
---
 src/index.ts       |  6 +++++-
 test/index.test.ts | 10 +++++++++-
 2 files changed, 14 insertions(+), 2 deletions(-)

diff --git a/src/index.ts b/src/index.ts
index d00fe2f..b6bbf79 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -55,7 +55,11 @@ async function axiosFetch (
   try {
     result = await axios.request(config);
   } catch (err) {
-    result = err.response;
+    if (err.response) {
+      result = err.response;
+    } else {
+      throw err;
+    }
   }
 
   const fetchHeaders = new FetchHeaders(result.headers);
diff --git a/test/index.test.ts b/test/index.test.ts
index cfa596f..3e283ff 100644
--- a/test/index.test.ts
+++ b/test/index.test.ts
@@ -45,7 +45,9 @@ test.before(() => {
     .get('/failure')
     .reply(501)
     .get('/failureBody')
-    .reply(400, { test: true });
+    .reply(400, { test: true })
+    .get('/error')
+    .replyWithError('simulated failure');
 });
 
 async function dualFetch (input: string, init?: FetchInit) {
@@ -199,6 +201,12 @@ test('returns the expected response body on a failure', async (test) => {
   test.deepEqual(axiosResponse.headers, expectedResponse.headers);
 });
 
+test('throws the original error on a network error', async (test) => {
+  const axiosFetch = buildAxiosFetch(axios);
+  const error = await test.throwsAsync(axiosFetch(`${TEST_URL_ROOT}/error`));
+  test.is(error.message, 'simulated failure');
+});
+
 test('allows transforming request options', async (test) => {
   const originalUrl = `${TEST_URL_ROOT}/success/text`;
   const transformedUrl = `${TEST_URL_ROOT}/success/json`;