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require 'spec_helper'
describe Hitimes::TimedMetric do
before( :each ) do
@tm = Hitimes::TimedMetric.new( 'test-timed-metric' )
end
it "knows if it is running or not" do
@tm.running?.must_equal false
@tm.start
@tm.running?.must_equal true
@tm.stop
@tm.running?.must_equal false
end
it "#split returns the last duration and the timer is still running" do
@tm.start
d = @tm.split
@tm.running?.must_equal true
d.must_be :>, 0
@tm.count.must_equal 1
@tm.duration.must_equal d
end
it "#stop returns false if called more than once in a row" do
@tm.start
@tm.stop.must_be :>, 0
@tm.stop.must_equal false
end
it "does not count a currently running interval as an interval in calculations" do
@tm.start
@tm.count.must_equal 0
@tm.split
@tm.count.must_equal 1
end
it "#split called on a stopped timer does nothing" do
@tm.start
@tm.stop
@tm.split.must_equal false
end
it "calculates the mean of the durations" do
skip
2.times { @tm.start ; sleep 0.05 ; @tm.stop }
@tm.mean.must_be_close_to(0.05, 0.002)
end
it "calculates the rate of the counts " do
skip
5.times { @tm.start ; sleep 0.05 ; @tm.stop }
@tm.rate.must_be_close_to(20.00, 0.5)
end
it "calculates the stddev of the durations" do
skip
3.times { |x| @tm.start ; sleep(0.05 * x) ; @tm.stop }
@tm.stddev.must_be_close_to(0.05)
end
it "returns 0.0 for stddev if there is no data" do
@tm.stddev.must_equal 0.0
end
it "keeps track of the min value" do
skip
2.times { @tm.start ; sleep 0.05 ; @tm.stop }
@tm.min.must_be_close_to(0.05, 0.01)
end
it "keeps track of the max value" do
skip
2.times { @tm.start ; sleep 0.05 ; @tm.stop }
@tm.max.must_be_close_to(0.05, 0.01)
end
it "keeps track of the sum value" do
skip
2.times { @tm.start ; sleep 0.05 ; @tm.stop }
@tm.sum.must_be_close_to(0.10, 0.01)
end
it "keeps track of the sum of squars value" do
skip
3.times { @tm.start ; sleep 0.05 ; @tm.stop }
@tm.sumsq.must_be_close_to(0.0075)
end
it "keeps track of the minimum start time of all the intervals" do
f1 = Time.now.gmtime.to_f * 1_000_000
5.times { @tm.start ; sleep 0.05 ; @tm.stop }
f2 = Time.now.gmtime.to_f * 1_000_000
@tm.sampling_start_time.must_be :>=, f1
@tm.sampling_start_time.must_be :<, f2
# distance from now to start time should be greater than the distance from
# the start to the min start_time
(f2 - @tm.sampling_start_time).must_be :>, ( @tm.sampling_start_time - f1 )
end
it "keeps track of the last stop time of all the intervals" do
f1 = Time.now.gmtime.to_f * 1_000_000
sleep 0.01
5.times { @tm.start ; sleep 0.05 ; @tm.stop }
sleep 0.01
f2 = Time.now.gmtime.to_f * 1_000_000
@tm.sampling_stop_time.must_be :>, f1
@tm.sampling_stop_time.must_be :<=, f2
# distance from now to max stop time time should be less than the distance
# from the start to the max stop time
(f2 - @tm.sampling_stop_time).must_be :<, ( @tm.sampling_stop_time - f1 )
end
it "can create an already running timer" do
t = Hitimes::TimedMetric.now( 'already-running' )
t.running?.must_equal true
end
it "can measure a block of code from an instance" do
skip
t = Hitimes::TimedMetric.new( 'measure a block' )
3.times { t.measure { sleep 0.05 } }
t.duration.must_be_close_to(0.15, 0.01)
t.count.must_equal 3
end
it "returns the value of the block when measuring" do
skip
t = Hitimes::TimedMetric.new( 'measure a block' )
x = t.measure { sleep 0.05; 42 }
t.duration.must_be_close_to(0.05, 0.002)
x.must_equal 42
end
describe "#to_hash" do
it "has name value" do
h = @tm.to_hash
h['name'].must_equal "test-timed-metric"
end
it "has an empty hash for additional_data" do
h = @tm.to_hash
h['additional_data'].must_equal Hash.new
h['additional_data'].size.must_equal 0
end
it "has the right sum" do
skip
10.times { |x| @tm.measure { sleep 0.01*x } }
h = @tm.to_hash
h['sum'].must_be_close_to(0.45, 0.01)
end
fields = ::Hitimes::Stats::STATS.dup + %w[ name additional_data sampling_start_time sampling_stop_time ]
fields.each do |f|
it "has a value for #{f}" do
@tm.measure { sleep 0.001 }
h = @tm.to_hash
h[f].wont_be_nil
end
end
end
end
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