33 lines
903 B
Crystal
33 lines
903 B
Crystal
require "./spec_helper"
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describe DB::Pool do
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it "should write from multiple connections" do
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channel = Channel(Nil).new
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fibers = 5
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max_n = 50
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with_db "#{DB_FILENAME}?max_pool_size=#{fibers}" do |db|
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db.exec "create table numbers (n integer, fiber integer)"
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fibers.times do |f|
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spawn do
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(1..max_n).each do |n|
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db.exec "insert into numbers (n, fiber) values (?, ?)", n, f
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sleep 0.01
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end
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channel.send nil
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end
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end
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fibers.times { channel.receive }
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# all numbers were inserted
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s = fibers * max_n * (max_n + 1) // 2
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db.scalar("select sum(n) from numbers").should eq(s)
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# numbers were not inserted one fiber at a time
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rows = db.query_all "select n, fiber from numbers", as: {Int32, Int32}
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rows.map(&.[1]).should_not eq(rows.map(&.[1]).sort)
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end
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end
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end
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