test: move TestLogger to spec/helpers

spec/helpers/test_logger.rb

@@ -0,0 +1,47 @@
+# frozen_string_literal: true
+
+class TestLogger
+
+  def initialize
+    @log_lines = []
+    @group_set = Klogger::GroupSet.new
+    @print = false
+  end
+
+  def print!
+    @print = true
+  end
+
+  def add(level, message, **tags)
+    @group_set.groups.each do |group|
+      tags = group[:tags].merge(tags)
+    end
+
+    @log_lines << { level: level, message: message, tags: tags }
+    puts message if @print
+    true
+  end
+
+  [:info, :debug, :warn, :error].each do |level|
+    define_method(level) do |message, **tags|
+      add(level, message, **tags)
+    end
+  end
+
+  def tagged(**tags, &block)
+    @group_set.call_without_id(**tags, &block)
+  end
+
+  def log_line(match)
+    @log_lines.reverse.each do |log_line|
+      return log_line if match.is_a?(String) && log_line[:message] == match
+      return log_line if match.is_a?(Regexp) && log_line[:message] =~ match
+    end
+    nil
+  end
+
+  def has_logged?(match)
+    !!log_line(match)
+  end
+
+end