require 'test_helper'
# Cannot use require since file name has no extension.
load File.join(File.dirname(__FILE__), '../bin/viewobs')

class ViewobsTest < Test::Unit::TestCase 
  context "Viewobs#view_line" do
    setup do
      @vo = Viewobs.new
      @vo.options = {}
      @line = File.readlines(fixture_file("double-obs.log")).first
      @attributes = LogParser.parse_line(@line)
      @observation = Observation.new(@attributes)
    end
    should "raise NoMethodError if there are two observations in one log line" do
      assert_raises(NoMethodError) { @vo.view_line(@attributes, @observation) }
    end
  end
  
  context "Viewobs when encountering a line with two observations" do
    setup do
      @argv = ARGV.dup
      ARGV.replace [fixture_file("double-obs.log")]
      @vo = Viewobs.new
      @vo.options = {};
      @buffer = ""
      @stderr, $stderr = $stderr, StringIO.new(@buffer)
    end
    teardown do
      ARGV.replace @argv
      $stderr = @stderr if @stderr
    end
    should "not crash" do
      assert_nothing_raised { @vo.view_until_end }
    end
    should "report on stderr" do
      assert @buffer.empty?
      @vo.view_until_end
      assert ! @buffer.empty?
    end
  end
  
end