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@ -3,14 +3,65 @@ require "./spec_helper" |
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describe Crystal::Scatter do |
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# TODO: Write tests |
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it "add elements" do |
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rg = Crystal::Scatter::RingGraph.new |
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rg.add(UInt64.new(1),[0,0,0,0,0,0],"OSD0") |
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rg.add(UInt64.new(1),[0,0,0,0,0,1],"OSD1") |
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rg.add(UInt64.new(1),[0,0,0,0,1,0],"OSD2") |
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rg.get_weight.should eq(3) |
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rg.generate_ring(BigRational.new(1)) |
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rg[0][0][0][0][0][0].range_effector.not_nil!.[0].should eq(0) |
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rg[0][0][0][0][1][0].range_effector.not_nil!.[1].should eq(UInt64::MAX) |
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end |
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it "add elements to RingGraphs" do |
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rg = Crystal::Scatter::RingGraph.new |
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rg.add(UInt64.new(1),[0,0,0,0,0,0],"OSD0") |
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rg.add(UInt64.new(1),[0,0,0,0,0,1],"OSD1") |
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rg.add(UInt64.new(1),[0,0,0,0,1,0],"OSD2") |
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rg.get_weight.should eq(3) |
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rg.generate_ring(BigRational.new(1)) |
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rg[0][0][0][0][0][0].range_effector.not_nil!.[0].should eq(0) |
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rg[0][0][0][0][1][0].range_effector.not_nil!.[1].should eq(UInt64::MAX) |
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end |
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it "hashes data fast" do |
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v = Crystal::Scatter::MetaRing.new(3) |
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time = Time.now |
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(1..100).each do |numb| |
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v.hash(numb.to_s) |
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end |
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t = (Time.now - time) |
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(t.milliseconds <= 1).should be_true |
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end |
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it "hashes data good" do |
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v = Crystal::Scatter::MetaRing.new(3) |
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hash_nb =1000000 |
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store = Hash(UInt64, Int32).new |
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(1..hash_nb).each do |numb| |
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h = v.hash(numb.to_s) |
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nb=store.fetch(h,0) |
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store[h]=nb+1 |
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end |
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conflicts = hash_nb-store.size |
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(conflicts <= 100).should be_true |
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mod_array = Array(Int32).new(1000,0) |
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slice_array = Array(Int32).new(1000,0) |
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store.each_key do |key| |
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key_mod = key%1000 |
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mod_array[key_mod]+=1 |
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key_slice = key/(UInt64::MAX/1000) |
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slice_array[key_slice]+=1 |
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end |
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good_mod = true |
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good_slice = true |
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mod_array.each do |v| |
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good_mod&=(v > (hash_nb/1000*4/5)) |
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end |
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slice_array.each do |v| |
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good_slice&=(v > (hash_nb/1000*4/5)) |
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end |
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good_mod.should be_true |
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good_slice.should be_true |
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end |
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end |