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require 'runtime/interval_skip_list/spec_helper'
describe IntervalSkipList, " when #next_node_height returns 1, 3, 2, 3, 1 in order", :deterministic2 => true do
include IntervalSkipListSpecHelper
attr_reader :list, :node
before do
@list = IntervalSkipList.new
end
it_should_behave_like "#next_node_height is deterministic"
def expected_node_heights
[1, 3, 2, 3, 1]
end
describe ", when :a is inserted on 1..7" do
before do
list.insert(1..7, :a)
end
describe ", #containing" do
it "returns only :a from 2 through 6" do
(2..6).should contain_marker(:a)
end
it "returns nothing at 1 and 7" do
list.containing(1).should be_empty
list.containing(7).should be_empty
end
end
describe " #nodes[0]" do
before do
@node = list.nodes[0]
end
it "has a key of 1 and height of 1" do
node.key.should == 1
node.height.should == 1
end
it "has :a as its only marker at level 0" do
node.forward_markers[0].should have_marker(:a)
end
it "has no markers" do
node.markers.should be_empty
end
it "is an endpoint of only :a" do
node.endpoint_of.should have_marker(:a)
end
end
describe " #nodes[1]" do
before do
@node = list.nodes[1]
end
it "has a key of 7 and height of 3" do
node.key.should == 7
node.height.should == 3
end
it "has no forward markers at any level" do
node.forward_markers[0].should be_empty
node.forward_markers[1].should be_empty
node.forward_markers[2].should be_empty
end
it "has :a as its only marker" do
node.markers.should have_marker(:a)
end
it "is an endpoint of only :a" do
node.endpoint_of.should have_marker(:a)
end
end
describe ", and then :b is inserted on 1..5" do
before do
list.insert(1..5, :b)
end
describe ", #containing" do
it "returns only :a and :b from 2 through 4" do
(2..4).should contain_markers(:a, :b)
end
it "returns only :a from 5 through 6" do
(5..6).should contain_marker(:a)
end
it "returns nothing at 1 and 7" do
list.containing(1).should be_empty
list.containing(7).should be_empty
end
end
describe " #nodes[0]" do
before do
@node = list.nodes[0]
end
it "has a key of 1 and height of 1" do
node.key.should == 1
node.height.should == 1
end
it "has :a and :b as its only forward markers at level 0" do
node.forward_markers[0].should have_markers(:a, :b)
end
it "has no markers" do
node.markers.should be_empty
end
it "is an endpoint of only :a and :b" do
node.endpoint_of.should have_markers(:a, :b)
end
end
describe " #nodes[1]" do
before do
@node = list.nodes[1]
end
it "has a key of 5 and height of 2" do
node.key.should == 5
node.height.should == 2
end
it "has :a as its only forward marker at level 1" do
node.forward_markers[1].should have_marker(:a)
end
it "has no forward markers at level 0" do
node.forward_markers[0].should be_empty
end
it "has :a and :b as its only markers" do
node.markers.should have_markers(:a, :b)
end
it "is an endpoint of only :b" do
node.endpoint_of.should have_marker(:b)
end
end
describe " #nodes[2]" do
before do
@node = list.nodes[2]
end
it "has a key of 7 and height of 3" do
node.key.should == 7
node.height.should == 3
end
it "has no forward markers at any level" do
node.forward_markers[0].should be_empty
node.forward_markers[1].should be_empty
node.forward_markers[2].should be_empty
end
it "has :a its only marker" do
node.markers.should have_marker(:a)
end
it "is an endpoint of only :a" do
node.endpoint_of.should have_marker(:a)
end
end
describe ", and then :c is inserted on 1..3" do
before do
list.insert(1..3, :c)
end
describe ", #containing" do
it "returns only :a, :b, and :c for 2" do
(2..2).should contain_markers(:a, :b, :c)
end
it "returns only :a, :b from 3..4" do
(3..4).should contain_markers(:a, :b)
end
it "returns only :a from 5..6" do
(5..6).should contain_markers(:a)
end
it "returns nothing at 1 and 7" do
list.containing(1).should be_empty
list.containing(7).should be_empty
end
end
describe " #nodes[0]" do
before do
@node = list.nodes[0]
end
it "has a key of 1 and height of 1" do
node.key.should == 1
node.height.should == 1
end
it "has :a, :b, :c as its only forward markers at level 0" do
node.forward_markers[0].should have_markers(:a, :b, :c)
end
it "has no markers" do
node.markers.should be_empty
end
it "is an endpoint of only :a, :b, :c" do
node.endpoint_of.should have_markers(:a, :b, :c)
end
end
describe " #nodes[1]" do
before do
@node = list.nodes[1]
end
it "has a key of 3 and height of 3" do
node.key.should == 3
node.height.should == 3
end
it "has :a as its only forward marker at level 2" do
node.forward_markers[2].should have_marker(:a)
end
it "has :b as its only forward marker at level 1" do
node.forward_markers[1].should have_marker(:b)
end
it "has no forward markers at level 0" do
node.forward_markers[0].should be_empty
end
it "has :a, :b, and :c as its only markers" do
node.markers.should have_markers(:a, :b, :c)
end
it "is an endpoint of only :c" do
node.endpoint_of.should have_marker(:c)
end
end
describe " #nodes[2]" do
before do
@node = list.nodes[2]
end
it "has a key of 5 and height of 2" do
node.key.should == 5
node.height.should == 2
end
it "has no forward markers at any level" do
node.forward_markers[0].should be_empty
node.forward_markers[1].should be_empty
end
it "has :b as its only markers" do
node.markers.should have_marker(:b)
end
it "is an endpoint of only :b" do
node.endpoint_of.should have_marker(:b)
end
end
describe " #nodes[3]" do
before do
@node = list.nodes[3]
end
it "has a key of 7 and height of 3" do
node.key.should == 7
node.height.should == 3
end
it "has no forward markers at any level" do
node.forward_markers[0].should be_empty
node.forward_markers[1].should be_empty
node.forward_markers[2].should be_empty
end
it "has :a as its only marker" do
node.markers.should have_marker(:a)
end
it "is an endpoint of only :a" do
node.endpoint_of.should have_marker(:a)
end
end
describe ", and then :d is inserted on 1..9" do
before do
list.insert(1..9, :d)
end
describe ", #containing" do
it "returns only :a, :b, :c, and :d for 2" do
(2..2).should contain_markers(:a, :b, :c, :d)
end
it "returns only :a, :b from 3..4" do
(3..4).should contain_markers(:a, :b, :d)
end
it "returns only :a from 5..6" do
(5..6).should contain_markers(:a, :d)
end
it "returns only :a from 7..8" do
(7..8).should contain_markers(:d)
end
it "returns nothing at 1 and 9" do
list.containing(1).should be_empty
list.containing(9).should be_empty
end
it "returns nothing for -1, 0, and 10" do
list.containing(-1).should be_empty
list.containing(0).should be_empty
list.containing(10).should be_empty
end
end
describe " #nodes[0]" do
before do
@node = list.nodes[0]
end
it "has a key of 1 and height of 1" do
node.key.should == 1
node.height.should == 1
end
it "has :a, :b, :c, :d as its only forward markers at level 0" do
node.forward_markers[0].should have_markers(:a, :b, :c, :d)
end
it "has no markers" do
node.markers.should be_empty
end
it "is an endpoint of only :a, :b, :c, and :d" do
node.endpoint_of.should have_markers(:a, :b, :c, :d)
end
end
describe " #nodes[1]" do
before do
@node = list.nodes[1]
end
it "has a key of 3 and height of 3" do
node.key.should == 3
node.height.should == 3
end
it "has :a and :d as its only forward markers at level 2" do
node.forward_markers[2].should have_markers(:a, :d)
end
it "has :b as its only marker at level 1" do
node.forward_markers[1].should have_marker(:b)
end
it "has no forward markers at level 0" do
node.forward_markers[0].should be_empty
end
it "has :a, :b, :c, :d as its only markers" do
node.markers.should have_markers(:a, :b, :c, :d)
end
it "is an endpoint of only :c" do
node.endpoint_of.should have_marker(:c)
end
end
describe " #nodes[2]" do
before do
@node = list.nodes[2]
end
it "has a key of 5 and height of 2" do
node.key.should == 5
node.height.should == 2
end
it "has no markers on any level" do
node.forward_markers[0].should be_empty
node.forward_markers[1].should be_empty
end
it "has :b as its only marker" do
node.markers.should have_marker(:b)
end
it "is an endpoint of only :b" do
node.endpoint_of.should have_marker(:b)
end
end
describe " #nodes[3]" do
before do
@node = list.nodes[3]
end
it "has a key of 7 and height of 3" do
node.key.should == 7
node.height.should == 3
end
it "has :d as its only marker at level 0" do
node.forward_markers[0].should have_marker(:d)
end
it "has no forward markers at levels 1 and 2" do
node.forward_markers[1].should be_empty
node.forward_markers[2].should be_empty
end
it "has :a, :d as its only markers" do
node.markers.should have_markers(:a, :d)
end
it "is an endpoint of only :a" do
node.endpoint_of.should have_marker(:a)
end
end
describe " #nodes[4]" do
before do
@node = list.nodes[4]
end
it "has a key of 9 and height of 1" do
node.key.should == 9
node.height.should == 1
end
it "has no forward markers at level 0" do
node.forward_markers[0].should be_empty
end
it "has :d as its only marker" do
node.markers.should have_marker(:d)
end
it "is an endpoint of only :d" do
node.endpoint_of.should have_marker(:d)
end
end
describe ", and then :d is deleted" do
before do
list.delete(:d)
end
it "has only 4 nodes" do
list.nodes.size.should == 4
end
describe " #nodes[0]" do
before do
@node = list.nodes[0]
end
it "has a key of 1 and height of 1" do
node.key.should == 1
node.height.should == 1
end
it "has :a, :b, and :c as its only forward markers at level 0" do
node.forward_markers[0].should have_markers(:a, :b, :c)
end
end
describe " #nodes[1]" do
before do
@node = list.nodes[1]
end
it "has a key of 3 and height of 3" do
node.key.should == 3
node.height.should == 3
end
it "has :a as its only forward marker at level 2" do
node.forward_markers[2].should have_marker(:a)
end
it "has :b as its only forward marker at level 1" do
node.forward_markers[1].should have_marker(:b)
end
it "has no forward markers at level 0" do
node.forward_markers[0].should be_empty
end
it "has :a, :b, and :c as its only markers" do
node.markers.should have_markers(:a, :b, :c)
end
it "is the endpoint of only :c" do
node.endpoint_of.should have_marker(:c)
end
end
describe " #nodes[2]" do
before do
@node = list.nodes[2]
end
it "has a key of 5 and height of 2" do
node.key.should == 5
node.height.should == 2
end
it "has no forward markers at any level" do
node.forward_markers[0].should be_empty
node.forward_markers[1].should be_empty
end
it "has :b as its only marker" do
node.markers.should have_marker(:b)
end
it "is the endpoint of only :b" do
node.endpoint_of.should have_marker(:b)
end
end
describe " #nodes[3]" do
before do
@node = list.nodes[3]
end
it "has a key of 7 and height of 3" do
node.key.should == 7
node.height.should == 3
end
it "has no forward markers at any level" do
node.forward_markers[0].should be_empty
node.forward_markers[1].should be_empty
node.forward_markers[2].should be_empty
end
it "has :a as its only marker" do
node.markers.should have_marker(:a)
end
it "is the endpoint of only :a" do
node.endpoint_of.should have_marker(:a)
end
end
describe ", and then :c is deleted" do
before do
list.delete(:c)
end
it "has only 3 nodes" do
list.nodes.size.should == 3
end
describe " #nodes[0]" do
before do
@node = list.nodes[0]
end
it "has a key of 1 and height of 1" do
node.key.should == 1
node.height.should == 1
end
it "has :a and :b as its only forward markers at level 0" do
node.forward_markers[0].should have_markers(:a, :b)
end
it "has no markers" do
node.markers.should be_empty
end
it "is an endpoint of only :a and :b" do
node.endpoint_of.should have_markers(:a, :b)
end
end
describe " #nodes[1]" do
before do
@node = list.nodes[1]
end
it "has a key of 5 and height of 2" do
node.key.should == 5
node.height.should == 2
end
it "has :a as its only forward marker at level 1" do
node.forward_markers[1].should have_marker(:a)
end
it "has no forward markers at level 0" do
node.forward_markers[0].should be_empty
end
it "has :a and :b as its only markers" do
node.markers.should have_markers(:a, :b)
end
it "is an endpoint of only :b" do
node.endpoint_of.should have_marker(:b)
end
end
describe " #nodes[2]" do
before do
@node = list.nodes[2]
end
it "has a key of 7 and height of 3" do
node.key.should == 7
node.height.should == 3
end
it "has no forward markers at any level" do
node.forward_markers[0].should be_empty
node.forward_markers[1].should be_empty
node.forward_markers[2].should be_empty
end
it "has :a its only marker" do
node.markers.should have_marker(:a)
end
it "is an endpoint of only :a" do
node.endpoint_of.should have_marker(:a)
end
end
end
end
end
end
end
end
end
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