From c024d00c5e07b25ff6b379d1961734469361dd36 Mon Sep 17 00:00:00 2001
From: Joan Touzet <joant@atypical.net>
Date: Wed, 31 May 2017 16:44:12 -0400
Subject: Improve JS test harness restartServer() support fn

restartServer() is still erroring out sometimes in Travis/Jenkins. This
PR both bumps the timeout to 15s as well as changes the detection
mechanism for restart to look for the uptime in _system to reset to a
low number.

This PR also removes the eclipsed redundant restartServer() definition
in couch_test_runner.js.

Closes #553
---
 test/javascript/couch_test_runner.js | 31 -------------------------------
 test/javascript/test_setup.js        | 32 ++++++++++++++++++++++++++++----
 2 files changed, 28 insertions(+), 35 deletions(-)

diff --git a/test/javascript/couch_test_runner.js b/test/javascript/couch_test_runner.js
index 656785980..d51748b7b 100644
--- a/test/javascript/couch_test_runner.js
+++ b/test/javascript/couch_test_runner.js
@@ -436,37 +436,6 @@ function waitForSuccess(fun, tag) {
   }
 }
 
-function getCurrentToken() {
-  var xhr = CouchDB.request("GET", "/_restart/token");
-  return JSON.parse(xhr.responseText).token;
-};
-
-
-function restartServer() {
-  var token = getCurrentToken();
-  var token_changed = false;
-  var tDelta = 5000;
-  var t0 = new Date();
-  var t1;
-
-  CouchDB.request("POST", "/_restart");
-
-  do {
-    try {
-      if(token != getCurrentToken()) {
-        token_changed = true;
-      }
-    } catch (e) {
-      // Ignore errors while the server restarts
-    }
-    t1 = new Date();
-  } while(((t1 - t0) <= tDelta) && !token_changed);
-
-  if(!token_changed) {
-    throw("Server restart failed");
-  }
-}
-
 // legacy functions for CouchDB < 1.2.0
 // we keep them to make sure we keep BC
 CouchDB.user_prefix = "org.couchdb.user:";
diff --git a/test/javascript/test_setup.js b/test/javascript/test_setup.js
index ccc0485aa..567848d9f 100644
--- a/test/javascript/test_setup.js
+++ b/test/javascript/test_setup.js
@@ -61,8 +61,7 @@ function waitForSuccess(fun, tag) {
     var now = new Date().getTime();
     if (now > start + 10000) {
       complete = true;
-      print('\nFAIL ' + tag);
-      quit(1);
+      throw(Error('\nFAIL ' + tag));
     }
     try {
       while (new Date().getTime() < now + 500);
@@ -71,11 +70,36 @@ function waitForSuccess(fun, tag) {
   }
 }
 
+function getUptime() {
+  var url = "/_node/node1@127.0.0.1/_system"
+  var stats = JSON.parse(CouchDB.request("GET", url).responseText);
+  return stats['uptime'];
+}
+
 function restartServer() {
+  var olduptime = getUptime();
+  if (olduptime < 5) {
+    // handle quick-restarts, though this slows things down
+    sleep(5000);
+    olduptime = getUptime();
+  }
   print('restart');
+
+  /* Need to pass olduptime to check fn so can't reuse waitForSuccess here */
   var start = new Date().getTime();
-  while (new Date().getTime() < start + 1000);
-  waitForSuccess(CouchDB.isRunning, 'restart');
+  var complete = false;
+  while (!complete) {
+    var now = new Date().getTime();
+    if (now > start + 10000) {
+      complete = true;
+      uptime = getUptime();
+      throw(Error('FAILED to restart: ' + uptime + ' not < ' + olduptime));
+    }
+    try {
+      sleep(500);
+      complete = getUptime() < olduptime;
+    } catch (e) {}
+  }
 }
 
 /*
-- 
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