Implement verbose mode

features/cli/verbose.feature

@@ -0,0 +1,5 @@
+Feature: verbose CLI option
+
+  Scenario: raises the logger level to INFO
+    When I run uhwm with option -v
+    Then the current output must match /log.+info.+level/i

features/steps/output_steps.rb

@@ -1,7 +1,12 @@
 def uhwm_wait_output message, timeout: 1
   Timeout.timeout(timeout) do
     loop do
-      break if assert_partial_output_interactive message
+      break if case message
+      when Regexp
+        @process.read_stdout =~ message
+      when String
+        assert_partial_output_interactive message
+      end
       sleep 0.1
     end
   end
@@ -15,5 +20,10 @@ Usage: uhwm [options]
 
 options:
     -h, --help                       print this message
+    -v, --version                    enable verbose mode
   eoh
 end
+
+Then /^the current output must match \/([^\/]+)\/([a-z]+)$/ do |pattern, options|
+  uhwm_wait_output Regexp.new(pattern, options)
+end

features/steps/run_steps.rb

@@ -1,4 +1,4 @@
-def uhwm_run options = nil
+def uhwm_run options = '-v'
   command = %w[uhwm]
   command << options if options
   @interactive = @process = run command.join ' '