data_spec.rb

require File.expand_path(File.dirname(__FILE__) + '/spec_helper')

describe SimpleStatistics::Data do
  describe "collection" do
    before :each do
      @data = SimpleStatistics::Data.new
    end
    
    it "should accept probes with #add_probe" do
      lambda {
        @data.tick(:default)
        @data.add_probe(:default, 1)
      }.should_not raise_error
    end

    describe "accessed with proxy" do
      describe "with some probes" do
        before :each do
          @now = Time.now
          100.times do |i|
            Timecop.freeze(@now+i)
            @data.tick(:default)
            @data[:default].add_probe(i)
          end
          Timecop.return
        end
        
        describe "on call #last_probes_by_count with 3 probes" do
          before :each do
            @sample = @data[:default].last_probes_by_count(3)
          end
        
          it "should return Sample with correct data" do
            @sample.data.should == [97,98,99]
          end
        end

        describe "on call #last_probes_by_time with Time.now - 10.seconds probes" do
          before :each do
            @sample = @data[:default].last_probes_by_time(@now + 100 - 10)
          end
        
          it "should return Sample with correct data" do
            @sample.data.should == [90,91,92,93,94,95,96,97,98,99]
          end
        end
      end
    end

    describe "accessed without proxy" do
      describe "with some probes" do
        before :each do
          @now = Time.now
          100.times do |i|
            Timecop.freeze(@now+i)
            @data.tick(:default)
            @data.add_probe(:default, i)
          end
          Timecop.return
        end
        
        describe "on call #last_probes_by_count with 3 probes" do
          before :each do
            @sample = @data.last_probes_by_count(:default, 3)
          end
        
          it "should return Sample with correct data" do
            @sample.data.should == [97,98,99]
          end
        end

        describe "on call #last_probes_by_time with Time.now - 10.seconds probes" do
          before :each do
            @sample = @data.last_probes_by_time(:default, @now + 100 - 10)
          end
        
          it "should return Sample with correct data" do
            @sample.data.should == [90,91,92,93,94,95,96,97,98,99]
          end
        end
      end
    end
  end
end