log test

lib/logging.rb

@@ -18,7 +18,7 @@ module Logging
   module Methods
     def log
       return @logger if @logger
-      @logger = Logger.new STDOUT
+      @logger = Logger.new log_stream
       @logger.progname = self.name.split("::").last
       @logger.datetime_format = '%M:%S'
       @logger.level = Logger::INFO
@@ -42,5 +42,10 @@ module Logging
                       raise "unknown log level #{l}"
                     end
     end
+
+    private
+    def log_stream
+       STDOUT
+    end
   end
 end

test/lib/test_all.rb

@@ -0,0 +1 @@
+require_relative "log_test"

test/lib/test_log.rb

@@ -0,0 +1,34 @@
+require_relative '../helper'
+
+class MemLogger
+  def self.stream
+    @stream
+  end
+  def self.log_stream
+    @stream = StringIO.new
+  end
+  include Logging
+end
+
+class LoggerTest < MiniTest::Test
+
+  def setup
+    @logger = MemLogger.new
+  end
+
+  def test_debug
+    assert @logger.log.debug "Debug"
+  end
+  def test_info
+    assert @logger.log.info "Info"
+    assert MemLogger.stream.string.include? "Info"
+  end
+  def test_warn
+    assert @logger.log.warn "Warn"
+    assert MemLogger.stream.string.include? "Warn"
+  end
+  def test_error
+    assert @logger.log.error "Error"
+    assert MemLogger.stream.string.include? "Error"
+  end
+end