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# frozen_string_literal: true
require "spec_helper"
require "json"
describe Hitimes::Stats do
before(:each) do
@stats = Hitimes::Stats.new
@full_stats = Hitimes::Stats.new
[1, 2, 3].each { |i| @full_stats.update(i) }
end
it "is initialized with usable values" do
_(@stats.count).must_equal 0
_(@stats.min).must_equal Float::INFINITY
_(@stats.max).must_equal(-Float::INFINITY)
_(@stats.sum).must_equal 0.0
_(@stats.rate).must_equal 0.0
end
it "calculates the mean correctly" do
_(@full_stats.mean).must_equal 2.0
end
it "calculates the rate correctly" do
_(@full_stats.rate).must_equal 0.5
end
it "tracks the maximum value" do
_(@full_stats.max).must_equal 3.0
end
it "tracks the minimum value" do
_(@full_stats.min).must_equal 1.0
end
it "tracks the count" do
_(@full_stats.count).must_equal 3
end
it "tracks the sum" do
_(@full_stats.sum).must_equal 6.0
end
it "calculates the standard deviation" do
_(@full_stats.stddev).must_equal 1.0
end
it "calculates the sum of squares " do
_(@full_stats.sumsq).must_equal 14.0
end
describe "#to_hash " do
it "converts to a Hash" do
h = @full_stats.to_hash
_(h.size).must_equal Hitimes::Stats::STATS.size
_(h.keys.sort).must_equal Hitimes::Stats::STATS
end
it "converts to a limited Hash if given arguments" do
h = @full_stats.to_hash("min", "max", "mean")
_(h.size).must_equal 3
_(h.keys.sort).must_equal %w[max mean min]
h = @full_stats.to_hash(%w[count rate])
_(h.size).must_equal 2
_(h.keys.sort).must_equal %w[count rate]
end
it "raises NoMethodError if an invalid stat is used" do
_(-> { @full_stats.to_hash("wibble") }).must_raise(NoMethodError)
end
end
describe "#to_json" do
it "converts to a json string" do
j = @full_stats.to_json
h = JSON.parse(j)
_(h.size).must_equal Hitimes::Stats::STATS.size
_(h.keys.sort).must_equal Hitimes::Stats::STATS
end
it "converts to a limited Hash if given arguments" do
j = @full_stats.to_json("min", "max", "mean")
h = JSON.parse(j)
_(h.size).must_equal 3
_(h.keys.sort).must_equal %w[max mean min]
j = @full_stats.to_json(%w[count rate])
h = JSON.parse(j)
_(h.size).must_equal 2
_(h.keys.sort).must_equal %w[count rate]
end
it "raises NoMethodError if an invalid stat is used" do
_(-> { @full_stats.to_json("wibble") }).must_raise(NoMethodError)
end
end
end
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