run counter test with 1000 samples

and tune nginx to be able to handle the load

nginx/Dockerfile

@@ -1,4 +1,5 @@
 FROM nginx
 
-RUN rm /etc/nginx/conf.d/default.conf
-ADD default.conf /etc/nginx/conf.d/
+RUN rm /etc/nginx/conf.d/default.conf /etc/nginx/nginx.conf
+COPY nginx.conf /etc/nginx/
+COPY default.conf /etc/nginx/conf.d/

nginx/nginx.conf

@@ -0,0 +1,31 @@
+user  nginx;
+worker_processes  1;
+
+error_log  /var/log/nginx/error.log warn;
+pid        /var/run/nginx.pid;
+
+
+events {
+    worker_connections  2048;
+}
+
+
+http {
+    include       /etc/nginx/mime.types;
+    default_type  application/octet-stream;
+
+    log_format  main  '$remote_addr - $remote_user [$time_local] "$request" '
+                      '$status $body_bytes_sent "$http_referer" '
+                      '"$http_user_agent" "$http_x_forwarded_for"';
+
+    access_log  /var/log/nginx/access.log  main;
+
+    sendfile        on;
+    #tcp_nopush     on;
+
+    keepalive_timeout  65;
+
+    #gzip  on;
+
+    include /etc/nginx/conf.d/*.conf;
+}

tests/Test/BlackBoxTest.php

@@ -54,18 +54,12 @@ public function gaugShouldBeOverwritten()
     public function countersShouldIncrementAtomically()
     {
         $start = microtime(true);
-        $promises = [
-            $this->client->getAsync('/examples/some_counter.php?c=0'),
-            $this->client->getAsync('/examples/some_counter.php?c=1'),
-            $this->client->getAsync('/examples/some_counter.php?c=2'),
-            $this->client->getAsync('/examples/some_counter.php?c=3'),
-            $this->client->getAsync('/examples/some_counter.php?c=4'),
-            $this->client->getAsync('/examples/some_counter.php?c=5'),
-            $this->client->getAsync('/examples/some_counter.php?c=6'),
-            $this->client->getAsync('/examples/some_counter.php?c=7'),
-            $this->client->getAsync('/examples/some_counter.php?c=8'),
-            $this->client->getAsync('/examples/some_counter.php?c=9'),
-        ];
+        $promises = [];
+        $sum = 0;
+        for ($i = 0; $i < 1000; $i++) {
+            $promises[] =  $this->client->getAsync('/examples/some_counter.php?c=' . $i);
+            $sum += $i;
+        }
 
         Promise\settle($promises)->wait();
         $end = microtime(true);
@@ -74,7 +68,7 @@ public function countersShouldIncrementAtomically()
         $metricsResult = $this->client->get('/examples/metrics.php');
         $body = (string)$metricsResult->getBody();
 
-        $this->assertThat($body, $this->stringContains('test_some_counter{type="blue"} 45'));
+        $this->assertThat($body, $this->stringContains('test_some_counter{type="blue"} ' . $sum));
     }
 
     /**