Tune examples to cover some cases

.rubocop.yml

@@ -36,3 +36,6 @@ Style/GlobalVars:
 
 Style/SingleLineMethods:
   Enabled: false
+
+Style/SpecialGlobalVars:
+  Enabled: false

examples/net_http/05_circuit_in_threads.rb

@@ -86,21 +86,25 @@
     Net::HTTP.start("example.com", 81, open_timeout: 3) do |http|
       http.request_get(bad_host)
     end
-  rescue => e
+  rescue Net::OpenTimeout => e
     puts "[thread=#{thread_id}]   >> Could not connect: #{e.message}".brown
   end
   puts
 
-  sleep(2)
+  sleep(1.5)
 
   puts "[thread=#{thread_id}] >> 4. Request to http://example.com:81/index.html - fail".magenta
   begin
     Net::HTTP.start("example.com", 81, open_timeout: 3) do |http|
       http.request_get(bad_host)
     end
-  rescue => e
+  rescue Net::OpenTimeout => e
     puts "[thread=#{thread_id}]   >> Could not connect: #{e.message}".brown
   end
+
+  resource = Semian["nethttp_example_com"]
+  raise "The state should be open - because expected 2 failed requests in last 5 seconds." unless resource.open?
+
   puts "[thread=#{thread_id}]   !!! Semian changed state from `closed` to `open` and record last error exception !!!".red.bold
   puts
 
@@ -111,6 +115,8 @@
     end
   rescue Net::CircuitOpenError => e
     puts "[thread=#{thread_id}]  >> Semian is open: #{e.message}".brown
+  rescue => e
+    raise "Unexpected exception: #{e.messge} (#{e.class}). Check if Semian resource error_threshold_reached?"
   end
   puts
 

examples/net_http/06_circuit_in_fork.rb

@@ -88,19 +88,19 @@
     Net::HTTP.start("example.com", 81, open_timeout: 3) do |http|
       http.request_get(bad_host)
     end
-  rescue => e
+  rescue Net::OpenTimeout => e
     puts "[pid=#{pid}]   >> Could not connect: #{e.message}".brown
   end
   puts
 
-  sleep(2)
+  sleep(1.5)
 
   puts "[pid=#{pid}] >> 4. Request to http://example.com:81/index.html - fail".magenta
   begin
     Net::HTTP.start("example.com", 81, open_timeout: 3) do |http|
       http.request_get(bad_host)
     end
-  rescue => e
+  rescue Net::OpenTimeout => e
     puts "[pid=#{pid}]   >> Could not connect: #{e.message}".brown
   end
   puts "[pid=#{pid}]   !!! Semian changed state from `closed` to `open` and record last error exception !!!".red.bold
@@ -125,6 +125,9 @@
 end
 
 Process.waitpid(worker_bar)
+exit($?.exitstatus) if $?.exitstatus != 0
+
 Process.waitpid(worker_foo)
+exit($?.exitstatus) if $?.exitstatus != 0
 
 puts "> That's all Folks!".green

examples/net_http/11_bulkhead_in_forks.rb

@@ -47,8 +47,8 @@
   Net::HTTP.start("example.com", 81, open_timeout: 5) do |http|
     http.request_get(bad_host)
   end
-rescue Errno::EADDRNOTAVAIL => e
-  puts "[pid=#{pid}] Expected networking problem that blocked the last ticket: #{e.class}: #{e.message}".blue
+rescue Errno::EADDRNOTAVAIL, Net::OpenTimeout => e
+  puts "[pid=#{pid}] EXPECTED networking problem that blocked the last ticket: #{e.class}: #{e.message}".blue
 end
 
 2.times do
@@ -58,7 +58,7 @@
     Net::HTTP.get_response(uri)
     raise "Should not get to this line."
   rescue Net::ResourceBusyError => e
-    puts "[pid=#{pid}] Out of tickets: #{e.class}: #{e.message}\n    #{e.backtrace.join("\n    ")}".brown
+    puts "[pid=#{pid}] EXPECTED: Out of tickets: #{e.class}: #{e.message}".brown
   end
 end
 

examples/net_http/12_bulkhead_quotes_in_forks.rb

@@ -70,8 +70,9 @@ def print_semaphore_information(resource = nil)
   Net::HTTP.start("example.com", 81, open_timeout: 5) do |http|
     http.request_get(bad_host)
   end
-rescue Errno::EADDRNOTAVAIL => e
-  puts "[pid=#{pid}] Expected networking problem that blocked the last ticket: #{e.class}: #{e.message}".blue
+  raise "Should not get to this line."
+rescue Errno::EADDRNOTAVAIL, Net::OpenTimeout => e
+  puts "[pid=#{pid}] EXPECTED networking problem that blocked the last ticket: #{e.class}: #{e.message}".blue
 end
 
 5.times do |_i|