require "spec"
require "./db-cars.cr"

describe "SPECDB::Common" do
	it "basics, 3 values" do
		car0 = Car.new "Corvet-0", "red", [] of String
		car1 = Car.new "Corvet-1", "red", [] of String
		car2 = Car.new "Corvet-2", "red", [] of String
		car3 = Car.new "Corvet-3", "red", [] of String

		db = SPECDB::Common(Car).new "", 3

		db.data.keys.sort.should eq([] of Int32)

		db << car0
		db.data.keys.sort.should eq([0] of Int32)

		db << car1
		db.data.keys.sort.should eq([0, 1] of Int32)

		db << car2
		db.data.keys.sort.should eq([0, 1, 2] of Int32)
		db[0] # Let's use the first value, it shouldn't be the one to be dropped.

		db << car3
		db.data.keys.sort.should eq([0, 2, 3] of Int32)
		db.lru.to_s.should eq "[ 3, 0, 2 ]"

		db.delete 2
		db.data.keys.sort.should eq([0, 3] of Int32)
		db.lru.to_s.should eq "[ 3, 0 ]"
	end
end