diff options
Diffstat (limited to 'spec/ruby/core/array/sample_spec.rb')
-rw-r--r-- | spec/ruby/core/array/sample_spec.rb | 30 |
1 files changed, 20 insertions, 10 deletions
diff --git a/spec/ruby/core/array/sample_spec.rb b/spec/ruby/core/array/sample_spec.rb index 565d7ff7f9..6ef78594f0 100644 --- a/spec/ruby/core/array/sample_spec.rb +++ b/spec/ruby/core/array/sample_spec.rb @@ -3,26 +3,36 @@ require_relative 'fixtures/classes' describe "Array#sample" do it "samples evenly" do - ary = [0, 1, 2, 3] - 3.times do |i| - counts = [0, 0, 0, 0] - 4000.times do - counts[ary.sample(3)[i]] += 1 - end - counts.each do |count| - (800..1200).should include(count) - end - end + ArraySpecs.measure_sample_fairness(4, 1, 400) + ArraySpecs.measure_sample_fairness(4, 2, 400) + ArraySpecs.measure_sample_fairness(4, 3, 400) + ArraySpecs.measure_sample_fairness(40, 3, 400) + ArraySpecs.measure_sample_fairness(40, 4, 400) + ArraySpecs.measure_sample_fairness(40, 8, 400) + ArraySpecs.measure_sample_fairness(40, 16, 400) + ArraySpecs.measure_sample_fairness_large_sample_size(100, 80, 4000) end it "returns nil for an empty Array" do [].sample.should be_nil end + it "returns nil for an empty array when called without n and a Random is given" do + [].sample(random: Random.new(42)).should be_nil + end + it "returns a single value when not passed a count" do [4].sample.should equal(4) end + it "returns a single value when not passed a count and a Random is given" do + [4].sample(random: Random.new(42)).should equal(4) + end + + it "returns a single value when not passed a count and a Random class is given" do + [4].sample(random: Random).should equal(4) + end + it "returns an empty Array when passed zero" do [4].sample(0).should == [] end |