Move helpers to spec file, use const's instead of helper methods

lib/gitlab/health_checks/fs_shards_check.rb

@@ -2,6 +2,9 @@ module Gitlab
   module HealthChecks
     class FsShardsCheck
       extend BaseAbstractCheck
+      RANDOM_STRING = SecureRandom.hex(1000).freeze
+      COMMAND_TIMEOUT = '1'.freeze
+      TIMEOUT_EXECUTABLE = 'timeout'.freeze
 
       class << self
         def readiness
@@ -41,9 +44,6 @@ module Gitlab
 
         private
 
-        RANDOM_STRING = SecureRandom.hex(1000).freeze
-        COMMAND_TIMEOUT = 1.second
-
         def operation_metrics(ok_metric, latency_metric, operation, **labels)
           with_timing operation do |result, elapsed|
             [
@@ -64,12 +64,8 @@ module Gitlab
           @storage_paths ||= Gitlab.config.repositories.storages
         end
 
-        def with_timeout(args)
-          %W{timeout #{COMMAND_TIMEOUT.to_i}}.concat(args)
-        end
-
         def exec_with_timeout(cmd_args, *args, &block)
-          Gitlab::Popen.popen(with_timeout(cmd_args), *args, &block)
+          Gitlab::Popen.popen([TIMEOUT_EXECUTABLE, COMMAND_TIMEOUT].concat(cmd_args), *args, &block)
         end
 
         def tmp_file_path(storage_name)

spec/lib/gitlab/health_checks/fs_shards_check_spec.rb

 require 'spec_helper'
 
 describe Gitlab::HealthChecks::FsShardsCheck do
-  include TimeoutHelper
+  def command_exists?(command)
+    _, status = Gitlab::Popen.popen(%W{ #{command} 1 echo })
+    status == 0
+  rescue Errno::ENOENT
+    false
+  end
+
+  def timeout_command
+    @timeout_command ||=
+      if command_exists?('timeout')
+        'timeout'
+      elsif command_exists?('gtimeout')
+        'gtimeout'
+      else
+        ''
+      end
+  end
 
   let(:metric_class) { Gitlab::HealthChecks::Metric }
   let(:result_class) { Gitlab::HealthChecks::Result }
@@ -17,6 +33,7 @@ describe Gitlab::HealthChecks::FsShardsCheck do
   before do
     allow(described_class).to receive(:repository_storages) { repository_storages }
     allow(described_class).to receive(:storages_paths) { storages_paths }
+    stub_const('Gitlab::HealthChecks::FsShardsCheck::TIMEOUT_EXECUTABLE', timeout_command)
   end
 
   after do
@@ -109,10 +126,10 @@ describe Gitlab::HealthChecks::FsShardsCheck do
   end
 
   context 'when timeout kills fs checks' do
-    let(:timeout_seconds) { 1.to_s }
-
     before do
-      allow(described_class).to receive(:with_timeout) { [timeout_command, timeout_seconds, 'sleep', '20'] }
+      stub_const('Gitlab::HealthChecks::FsShardsCheck::COMMAND_TIMEOUT', '1')
+
+      allow(described_class).to receive(:exec_with_timeout).and_wrap_original { |m| m.call(%w(sleep 60)) }
       FileUtils.chmod_R(0755, tmp_dir)
     end
 
@@ -140,7 +157,6 @@ describe Gitlab::HealthChecks::FsShardsCheck do
   end
 
   context 'when popen always finds required binaries' do
-    let(:timeout_seconds) { 30.to_s }
     before do
       allow(described_class).to receive(:exec_with_timeout).and_wrap_original do |method, *args, &block|
         begin
@@ -150,9 +166,7 @@ describe Gitlab::HealthChecks::FsShardsCheck do
         end
       end
 
-      allow(described_class).to receive(:with_timeout) do |args, &block|
-        [timeout_command, timeout_seconds].concat(args)
-      end
+      stub_const('Gitlab::HealthChecks::FsShardsCheck::COMMAND_TIMEOUT', '10')
     end
 
     it_behaves_like 'filesystem checks'

spec/support/timeout_helper.rb

-module TimeoutHelper
-  def command_exists?(command)
-    _, status = Gitlab::Popen.popen(%W{ #{command} 1 echo })
-    status == 0
-  rescue Errno::ENOENT
-    false
-  end
-
-  def timeout_command
-    @timeout_command ||=
-      if command_exists?('timeout')
-        'timeout'
-      elsif command_exists?('gtimeout')
-        'gtimeout'
-      else
-        ''
-      end
-  end
-end