From 3c289a5510b54f755af47153faeb9a2029c67f23 Mon Sep 17 00:00:00 2001
From: Benjamin Coe <bencoe@google.com>
Date: Tue, 3 Mar 2020 13:32:32 -0800
Subject: [PATCH] feat: add ECONNREFUSED to list of known errors for
 isAvailable()

---
 src/index.ts       |  1 +
 test/index.test.ts | 33 +++++++++++++++++++--------------
 2 files changed, 20 insertions(+), 14 deletions(-)

diff --git a/src/index.ts b/src/index.ts
index e68e0b0..5127e39 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -203,6 +203,7 @@ export async function isAvailable() {
         'ENETUNREACH',
         'ENOENT',
         'ENOTFOUND',
+        'ECONNREFUSED',
       ].includes(err.code)
     ) {
       // Failure to resolve the metadata service means that it is not available.
diff --git a/test/index.test.ts b/test/index.test.ts
index 645a34a..b12e557 100644
--- a/test/index.test.ts
+++ b/test/index.test.ts
@@ -244,20 +244,25 @@ it('should log error if DEBUG_AUTH is set', async () => {
   assert.strictEqual(/failed, reason/.test(err!.message), true);
 });
 
-['EHOSTDOWN', 'EHOSTUNREACH', 'ENETUNREACH', 'ENOENT', 'ENOTFOUND'].forEach(
-  errorCode => {
-    it(`should fail fast on isAvailable if ${errorCode} is returned`, async () => {
-      const secondary = secondaryHostRequest(500);
-      const primary = nock(HOST)
-        .get(`${PATH}/${TYPE}`)
-        .replyWithError({code: errorCode});
-      const isGCE = await gcp.isAvailable();
-      await secondary;
-      primary.done();
-      assert.strictEqual(false, isGCE);
-    });
-  }
-);
+[
+  'EHOSTDOWN',
+  'EHOSTUNREACH',
+  'ENETUNREACH',
+  'ENOENT',
+  'ENOTFOUND',
+  'ECONNREFUSED',
+].forEach(errorCode => {
+  it(`should fail fast on isAvailable if ${errorCode} is returned`, async () => {
+    const secondary = secondaryHostRequest(500);
+    const primary = nock(HOST)
+      .get(`${PATH}/${TYPE}`)
+      .replyWithError({code: errorCode});
+    const isGCE = await gcp.isAvailable();
+    await secondary;
+    primary.done();
+    assert.strictEqual(false, isGCE);
+  });
+});
 
 it(`should fail fast on isAvailable if 404 status code is returned`, async () => {
   const secondary = secondaryHostRequest(500);