Tests and benchmarks are now more consistent.

toying-with-ramdb
Philippe PITTOLI 2024-05-10 15:23:28 +02:00
parent 0a357446ef
commit c124b23d7a
9 changed files with 487 additions and 510 deletions

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@ -1,6 +1,6 @@
require "benchmark"
require "./benchmark-utilities.cr"
require "./cars.cr"
require "./utilities.cr"
require "./db-cars.cr"
cars_ram = DODB::RAMOnlySpecDataBase(Car).new
cars_cached = DODB::CachedSpecDataBase(Car).new
@ -12,70 +12,75 @@ cached_searchby_name, cached_searchby_color, cached_searchby_keywords = ca
semi_searchby_name, semi_searchby_color, semi_searchby_keywords = cached_indexes cars_semi
uncached_searchby_name, uncached_searchby_color, uncached_searchby_keywords = uncached_indexes cars_uncached
add_cars cars_ram, 1_000
add_cars cars_cached, 1_000
add_cars cars_semi, 1_000
add_cars cars_uncached, 1_000
db_size = ENV["DBSIZE"].to_i rescue 1_000
car_name_to_search = ENV["CARNAME"] rescue "Corvet-#{(db_size/2).to_i}"
car_color_to_search = ENV["CARCOLOR"] rescue "red"
car_keyword_to_search = ENV["CARKEYWORD"] rescue "spacious"
add_cars cars_ram, db_size
add_cars cars_cached, db_size
add_cars cars_semi, db_size
add_cars cars_uncached, db_size
# Searching for data with an index.
puts "search by index 'Corvet-500': get a single value"
puts "search by index '#{car_name_to_search}': get a single value"
Benchmark.ips do |x|
x.report("(ram db and index) searching a data with an index") do
corvet = ram_searchby_name.get "Corvet-500"
x.report("(ram db and index) searching with an index") do
corvet = ram_searchby_name.get car_name_to_search
end
x.report("(cached db and index) searching a data with an index") do
corvet = cached_searchby_name.get "Corvet-500"
x.report("(cached db and index) searching with an index") do
corvet = cached_searchby_name.get car_name_to_search
end
x.report("(semi: uncached db but cached index) searching a data with an index") do
corvet = semi_searchby_name.get "Corvet-500"
x.report("(semi: uncached db but cached index) searching with an index") do
corvet = semi_searchby_name.get car_name_to_search
end
x.report("(uncached db and index) searching a data with an index") do
corvet = uncached_searchby_name.get "Corvet-500"
x.report("(uncached db and index) searching with an index") do
corvet = uncached_searchby_name.get car_name_to_search
end
end
# Searching for data with a partition.
puts ""
puts "search by partition 'red': get #{ram_searchby_color.get("red").size} values"
puts "search by partition #{car_color_to_search}: get #{ram_searchby_color.get(car_color_to_search).size} values"
Benchmark.ips do |x|
x.report("(ram db and partition) searching a data with a partition") do
corvet = ram_searchby_color.get "red"
x.report("(ram db and partition) searching with a partition") do
corvet = ram_searchby_color.get car_color_to_search
end
x.report("(cached db and partition) searching a data with a partition") do
corvet = cached_searchby_color.get "red"
x.report("(cached db and partition) searching with a partition") do
corvet = cached_searchby_color.get car_color_to_search
end
x.report("(semi: uncached db but cached partition) searching a data with a partition") do
corvet = semi_searchby_color.get "red"
x.report("(semi: uncached db but cached partition) searching with a partition") do
corvet = semi_searchby_color.get car_color_to_search
end
x.report("(uncached db and partition) searching a data with a partition") do
corvet = uncached_searchby_color.get "red"
x.report("(uncached db and partition) searching with a partition") do
corvet = uncached_searchby_color.get car_color_to_search
end
end
# Searching for data with a tag.
puts ""
puts "search by tag 'spacious': get #{ram_searchby_keywords.get("spacious").size} values"
puts "search by tag #{car_keyword_to_search}: get #{ram_searchby_keywords.get(car_keyword_to_search).size} values"
Benchmark.ips do |x|
x.report("(ram db and tag) searching a data with a tag") do
corvet = ram_searchby_keywords.get "spacious"
x.report("(ram db and tag) searching with a tag") do
corvet = ram_searchby_keywords.get car_keyword_to_search
end
x.report("(cached db and tag) searching a data with a tag") do
corvet = cached_searchby_keywords.get "spacious"
x.report("(cached db and tag) searching with a tag") do
corvet = cached_searchby_keywords.get car_keyword_to_search
end
x.report("(semi: uncached db but cached tag) searching a data with a tag") do
corvet = semi_searchby_keywords.get "spacious"
x.report("(semi: uncached db but cached tag) searching with a tag") do
corvet = semi_searchby_keywords.get car_keyword_to_search
end
x.report("(uncached db and tag) searching a data with a tag") do
corvet = uncached_searchby_keywords.get "spacious"
x.report("(uncached db and tag) searching with a tag") do
corvet = uncached_searchby_keywords.get car_keyword_to_search
end
end
@ -94,17 +99,12 @@ cached_searchby_name, cached_searchby_color, cached_searchby_keywords = ca
semi_searchby_name, semi_searchby_color, semi_searchby_keywords = cached_indexes cars_semi
uncached_searchby_name, uncached_searchby_color, uncached_searchby_keywords = uncached_indexes cars_uncached
add_cars cars_ram, 1_000
add_cars cars_cached, 1_000
add_cars cars_semi, 1_000
add_cars cars_uncached, 1_000
def perform_add(storage : DODB::Storage(Car), nb_run)
corvet0 = Car.new "Corvet", "red", [ "shiny", "impressive", "fast", "elegant" ]
i = 0
perform_benchmark_average nb_run, do
corvet = corvet0.clone
corvet.name = "Corvet-add-#{i}"
corvet.name = "Corvet-#{i}"
storage << corvet
i += 1
end

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@ -1,7 +1,5 @@
require "benchmark"
require "../src/dodb.cr"
require "./test-data.cr"
require "./db-ships.cr"
class DODBCached < DODB::CachedDataBase(Ship)
def initialize(storage_ext = "", remove_previous_data = true)

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@ -1,32 +0,0 @@
def perform_something(&block)
start = Time.monotonic
yield
Time.monotonic - start
end
def perform_benchmark_average(ntimes : Int32, &block)
i = 1
sum = Time::Span.zero
while i <= ntimes
elapsed_time = perform_something &block
sum += elapsed_time
i += 1
end
sum / ntimes
end
def perform_benchmark_average_verbose(title : String, ntimes : Int32, &block)
i = 1
sum = Time::Span.zero
puts "Execute '#{title}' × #{ntimes}"
while i <= ntimes
elapsed_time = perform_something &block
sum += elapsed_time
STDOUT.write "\relapsed_time: #{elapsed_time}, average: #{sum/i}".to_slice
i += 1
end
puts ""
puts "Average: #{sum/ntimes}"
end

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@ -1,430 +0,0 @@
require "spec"
require "file_utils"
require "../src/dodb.cr"
require "./spec-database.cr"
require "./test-data.cr"
describe "DODB::CachedDataBase" do
describe "basics" do
it "store and get data" do
db = DODB::CachedSpecDataBase(Ship).new
Ship.all_ships.each do |ship|
db << ship
end
db.to_a.sort.should eq(Ship.all_ships.sort)
db.rm_storage_dir
end
it "rewrite already stored data" do
db = DODB::CachedSpecDataBase(Ship).new
ship = Ship.all_ships[0]
key = db << ship
db[key] = Ship.new "broken"
db[key] = ship
db[key].should eq(ship)
db.rm_storage_dir
end
it "properly remove data" do
db = DODB::CachedSpecDataBase(Ship).new
Ship.all_ships.each do |ship|
db << ship
end
Ship.all_ships.each do |ship|
db.pop
end
Ship.all_ships.each_with_index do |ship, i|
# FIXME: Should it raise a particular exception?
expect_raises DODB::MissingEntry do
db[i]
end
db[i]?.should be_nil
end
db.rm_storage_dir
end
it "preserves data on reopening" do
db1 = DODB::CachedSpecDataBase(Ship).new
db1 << Ship.kisaragi
db1.to_a.size.should eq(1)
db2 = DODB::CachedSpecDataBase(Ship).new remove_previous_data: false
db2 << Ship.mutsuki
# Only difference with DODB::DataBase: concurrent DB cannot coexists.
db2.to_a.size.should eq(2)
db1.rm_storage_dir
db2.rm_storage_dir
end
it "iterates in normal and reversed order" do
db = DODB::CachedSpecDataBase(Ship).new
Ship.all_ships.each do |ship|
db << ship
end
# The two #each test iteration.
db.each_with_index do |item, index|
item.should eq Ship.all_ships[index]
end
db.each_with_index(reversed: true) do |item, index|
item.should eq Ship.all_ships[index]
end
# Actual reversal is tested here.
db.to_a(reversed: true).should eq db.to_a.reverse
db.rm_storage_dir
end
it "respects the provided offsets if any" do
db = DODB::CachedSpecDataBase(Ship).new
Ship.all_ships.each do |ship|
db << ship
end
db.to_a(start_offset: 0, end_offset: 0)[0]?.should eq Ship.mutsuki
db.to_a(start_offset: 1, end_offset: 1)[0]?.should eq Ship.kisaragi
db.to_a(start_offset: 2, end_offset: 2)[0]?.should eq Ship.yayoi
db.to_a(start_offset: 0, end_offset: 2).should eq [
Ship.mutsuki, Ship.kisaragi, Ship.yayoi
]
db.rm_storage_dir
end
end
describe "indices" do
it "do basic indexing" do
db = DODB::CachedSpecDataBase(Ship).new
db_ships_by_name = db.new_index "name", &.name
Ship.all_ships.each do |ship|
db << ship
end
Ship.all_ships.each_with_index do |ship|
db_ships_by_name.get?(ship.name).should eq(ship)
end
db.rm_storage_dir
end
it "raise on index overload" do
db = DODB::CachedSpecDataBase(Ship).new
db_ships_by_name = db.new_index "name", &.name
db << Ship.kisaragi
# Should not be allowed to store an entry whose “name” field
# already exists.
expect_raises(DODB::IndexOverload) do
db << Ship.kisaragi
end
db.rm_storage_dir
end
it "properly deindex" do
db = DODB::CachedSpecDataBase(Ship).new
db_ships_by_name = db.new_index "name", &.name
Ship.all_ships.each do |ship|
db << ship
end
Ship.all_ships.each_with_index do |ship, i|
db.delete i
end
Ship.all_ships.each do |ship|
db_ships_by_name.get?(ship.name).should be_nil
end
db.rm_storage_dir
end
it "properly reindex" do
db = DODB::CachedSpecDataBase(Ship).new
db_ships_by_name = db.new_index "name", &.name
key = db << Ship.kisaragi
# We give the old id to the new ship, to get it replaced in
# the database.
some_new_ship = Ship.all_ships[2].clone
db[key] = some_new_ship
db[key].should eq(some_new_ship)
db_ships_by_name.get?(some_new_ship.name).should eq(some_new_ship)
db.rm_storage_dir
end
it "properly updates" do
db = DODB::CachedSpecDataBase(Ship).new
db_ships_by_name = db.new_index "name", &.name
Ship.all_ships.each do |ship|
db << ship
end
new_kisaragi = Ship.kisaragi.clone.tap do |s|
s.name = "Kisaragi Kai" # Dont think about it too much.
end
# Were changing an indexed value on purpose.
db_ships_by_name.update "Kisaragi", new_kisaragi
db_ships_by_name.get?("Kisaragi").should be_nil
db_ships_by_name.get?(new_kisaragi.name).should eq new_kisaragi
db.rm_storage_dir
end
end
describe "partitions" do
it "do basic partitioning" do
db = DODB::CachedSpecDataBase(Ship).new
db_ships_by_class = db.new_partition "class", &.klass
Ship.all_ships.each do |ship|
db << ship
end
Ship.all_ships.each do |ship|
db_ships_by_class.get(ship.klass).should contain(ship)
end
# We extract the possible classes to do test on them.
ship_classes = Ship.all_ships.map(&.klass).uniq
ship_classes.each do |klass|
partition = db_ships_by_class.get klass
# A partition on “class” should contain entries that all
# share the same value of “class”.
partition.map(&.klass.==(klass)).reduce { |a, b|
a && b
}.should be_true
end
db_ships_by_class.get?("does-not-exist").should be_nil
db.rm_storage_dir
end
it "removes select elements from partitions" do
db = DODB::CachedSpecDataBase(Ship).new
db_ships_by_class = db.new_partition "class", &.klass
Ship.all_ships.each do |ship|
db << ship
end
db_ships_by_class.delete "Mutsuki", &.name.==("Kisaragi")
Ship.all_ships.map(&.klass).uniq.each do |klass|
partition = db_ships_by_class.get klass
partition.any?(&.name.==("Kisaragi")).should be_false
end
db.rm_storage_dir
end
end
describe "tags" do
it "do basic tagging" do
db = DODB::CachedSpecDataBase(Ship).new
db_ships_by_tags = db.new_tags "tags", &.tags
Ship.all_ships.each do |ship|
db << ship
end
db_ships_by_tags.get("flagship").should eq([Ship.flagship])
# All returned entries should have the requested tag.
db_ships_by_tags.get("name ship")
.map(&.tags.includes?("name ship"))
.reduce { |a, e| a && e }
.should be_true
# There shouldnt be one in our data about WWII Japanese warships…
db_ships_by_tags.get?("starship").should be_nil
db.rm_storage_dir
end
it "properly removes tags" do
db = DODB::CachedSpecDataBase(Ship).new
db_ships_by_tags = db.new_tags "tags", &.tags
Ship.all_ships.each do |ship|
db << ship
end
# Removing the “flagship” tag, brace for impact.
flagship, index = db_ships_by_tags.get_with_indice("flagship")[0]
flagship = flagship.clone
flagship.tags = [] of String
db[index] = flagship
# ship, index = db_ships_by_tags.update(tag: "flagship") do |ship, index|
# ship.tags = [] of String
# db[index] = ship
# end
db_ships_by_tags.get("flagship").should eq([] of Ship)
db.rm_storage_dir
end
it "gets items that have multiple tags" do
db = DODB::CachedSpecDataBase(Ship).new
db_ships_by_tags = db.new_tags "tags", &.tags
Ship.all_ships.each do |ship|
db << ship
end
results = db_ships_by_tags.get(["flagship", "name ship"])
results.should eq([Ship.yamato])
results = db_ships_by_tags.get(["name ship", "flagship"])
results.should eq([Ship.yamato])
results = db_ships_by_tags.get(["flagship"])
results.should eq([Ship.yamato])
db.rm_storage_dir
end
end
describe "atomic operations" do
it "safe_get and safe_get?" do
db = DODB::CachedSpecDataBase(Ship).new
db_ships_by_name = db.new_index "name", &.name
Ship.all_ships.each do |ship|
db << ship
end
Ship.all_ships.each do |ship|
db_ships_by_name.safe_get ship.name do |results|
results.should eq(ship)
end
db_ships_by_name.safe_get? ship.name do |results|
results.should eq(ship)
end
end
db.rm_storage_dir
end
end
describe "tools" do
it "rebuilds indexes" do
db = DODB::CachedSpecDataBase(Ship).new
db_ships_by_name = db.new_index "name", &.name
db_ships_by_class = db.new_partition "class", &.klass
db_ships_by_tags = db.new_tags "tags", &.tags
Ship.all_ships.each do |ship|
db << ship
end
db.reindex_everything!
Ship.all_ships.each do |ship|
db_ships_by_name.get?(ship.name).should eq(ship)
db_ships_by_class.get(ship.klass).should contain(ship)
end
db.rm_storage_dir
end
it "migrates properly" do
old_db = DODB::CachedSpecDataBase(PrimitiveShip).new "-migration-origin"
old_ships_by_name = old_db.new_index "name", &.name
old_ships_by_class = old_db.new_partition "class", &.class_name
PrimitiveShip.all_ships.each do |ship|
old_db << ship
end
# At this point, the “old” DB is filled. Now we need to convert
# to the new DB.
new_db = DODB::CachedSpecDataBase(Ship).new "-migration-target"
new_ships_by_name = new_db.new_index "name", &.name
new_ships_by_class = new_db.new_partition "class", &.klass
new_ships_by_tags = new_db.new_tags "tags", &.tags
old_db.each_with_index do |ship, index|
new_ship = Ship.new ship.name,
klass: ship.class_name,
id: ship.id,
tags: Array(String).new.tap { |tags|
tags << "name ship" if ship.name == ship.class_name
}
new_db[index] = new_ship
end
# At this point, the conversion is done, so… were making a few
# arbitrary tests on the new data.
old_db.each_with_index do |old_ship, old_index|
ship = new_db[old_index]
ship.id.should eq(old_ship.id)
ship.klass.should eq(old_ship.class_name)
ship.tags.any?(&.==("name ship")).should be_true if ship.name == ship.klass
end
old_db.rm_storage_dir
new_db.rm_storage_dir
end
end
end

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@ -1,6 +1,9 @@
require "uuid"
require "json"
require "../src/dodb.cr"
require "./spec-database.cr"
# FIXME: Split the test data in separate files. We dont care about those here.
class Ship

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@ -1,6 +1,5 @@
require "spec"
require "./benchmark-utilities.cr"
require "./cars.cr"
require "./db-cars.cr"
corvet0 = Car.new "Corvet-0", "red", [ "shiny", "impressive", "fast", "elegant" ]

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@ -1,9 +1,6 @@
require "spec"
require "file_utils"
require "../src/dodb.cr"
require "./spec-database.cr"
require "./test-data.cr"
require "./db-ships.cr"
def fork_process(&)
Process.new Crystal::System::Process.fork { yield }
@ -480,3 +477,428 @@ describe "DODB::DataBase" do
end
end
# Basically the same thing as before, with some slight
# differences based on the fact that changing the on-disk data
# won't change the cached one.
describe "DODB::CachedDataBase" do
describe "basics" do
it "store and get data" do
db = DODB::CachedSpecDataBase(Ship).new
Ship.all_ships.each do |ship|
db << ship
end
db.to_a.sort.should eq(Ship.all_ships.sort)
db.rm_storage_dir
end
it "rewrite already stored data" do
db = DODB::CachedSpecDataBase(Ship).new
ship = Ship.all_ships[0]
key = db << ship
db[key] = Ship.new "broken"
db[key] = ship
db[key].should eq(ship)
db.rm_storage_dir
end
it "properly remove data" do
db = DODB::CachedSpecDataBase(Ship).new
Ship.all_ships.each do |ship|
db << ship
end
Ship.all_ships.each do |ship|
db.pop
end
Ship.all_ships.each_with_index do |ship, i|
# FIXME: Should it raise a particular exception?
expect_raises DODB::MissingEntry do
db[i]
end
db[i]?.should be_nil
end
db.rm_storage_dir
end
it "preserves data on reopening" do
db1 = DODB::CachedSpecDataBase(Ship).new
db1 << Ship.kisaragi
db1.to_a.size.should eq(1)
db2 = DODB::CachedSpecDataBase(Ship).new remove_previous_data: false
db2 << Ship.mutsuki
# Only difference with DODB::DataBase: concurrent DB cannot coexists.
db2.to_a.size.should eq(2)
db1.rm_storage_dir
db2.rm_storage_dir
end
it "iterates in normal and reversed order" do
db = DODB::CachedSpecDataBase(Ship).new
Ship.all_ships.each do |ship|
db << ship
end
# The two #each test iteration.
db.each_with_index do |item, index|
item.should eq Ship.all_ships[index]
end
db.each_with_index(reversed: true) do |item, index|
item.should eq Ship.all_ships[index]
end
# Actual reversal is tested here.
db.to_a(reversed: true).should eq db.to_a.reverse
db.rm_storage_dir
end
it "respects the provided offsets if any" do
db = DODB::CachedSpecDataBase(Ship).new
Ship.all_ships.each do |ship|
db << ship
end
db.to_a(start_offset: 0, end_offset: 0)[0]?.should eq Ship.mutsuki
db.to_a(start_offset: 1, end_offset: 1)[0]?.should eq Ship.kisaragi
db.to_a(start_offset: 2, end_offset: 2)[0]?.should eq Ship.yayoi
db.to_a(start_offset: 0, end_offset: 2).should eq [
Ship.mutsuki, Ship.kisaragi, Ship.yayoi
]
db.rm_storage_dir
end
end
describe "indices" do
it "do basic indexing" do
db = DODB::CachedSpecDataBase(Ship).new
db_ships_by_name = db.new_index "name", &.name
Ship.all_ships.each do |ship|
db << ship
end
Ship.all_ships.each_with_index do |ship|
db_ships_by_name.get?(ship.name).should eq(ship)
end
db.rm_storage_dir
end
it "raise on index overload" do
db = DODB::CachedSpecDataBase(Ship).new
db_ships_by_name = db.new_index "name", &.name
db << Ship.kisaragi
# Should not be allowed to store an entry whose “name” field
# already exists.
expect_raises(DODB::IndexOverload) do
db << Ship.kisaragi
end
db.rm_storage_dir
end
it "properly deindex" do
db = DODB::CachedSpecDataBase(Ship).new
db_ships_by_name = db.new_index "name", &.name
Ship.all_ships.each do |ship|
db << ship
end
Ship.all_ships.each_with_index do |ship, i|
db.delete i
end
Ship.all_ships.each do |ship|
db_ships_by_name.get?(ship.name).should be_nil
end
db.rm_storage_dir
end
it "properly reindex" do
db = DODB::CachedSpecDataBase(Ship).new
db_ships_by_name = db.new_index "name", &.name
key = db << Ship.kisaragi
# We give the old id to the new ship, to get it replaced in
# the database.
some_new_ship = Ship.all_ships[2].clone
db[key] = some_new_ship
db[key].should eq(some_new_ship)
db_ships_by_name.get?(some_new_ship.name).should eq(some_new_ship)
db.rm_storage_dir
end
it "properly updates" do
db = DODB::CachedSpecDataBase(Ship).new
db_ships_by_name = db.new_index "name", &.name
Ship.all_ships.each do |ship|
db << ship
end
new_kisaragi = Ship.kisaragi.clone.tap do |s|
s.name = "Kisaragi Kai" # Dont think about it too much.
end
# Were changing an indexed value on purpose.
db_ships_by_name.update "Kisaragi", new_kisaragi
db_ships_by_name.get?("Kisaragi").should be_nil
db_ships_by_name.get?(new_kisaragi.name).should eq new_kisaragi
db.rm_storage_dir
end
end
describe "partitions" do
it "do basic partitioning" do
db = DODB::CachedSpecDataBase(Ship).new
db_ships_by_class = db.new_partition "class", &.klass
Ship.all_ships.each do |ship|
db << ship
end
Ship.all_ships.each do |ship|
db_ships_by_class.get(ship.klass).should contain(ship)
end
# We extract the possible classes to do test on them.
ship_classes = Ship.all_ships.map(&.klass).uniq
ship_classes.each do |klass|
partition = db_ships_by_class.get klass
# A partition on “class” should contain entries that all
# share the same value of “class”.
partition.map(&.klass.==(klass)).reduce { |a, b|
a && b
}.should be_true
end
db_ships_by_class.get?("does-not-exist").should be_nil
db.rm_storage_dir
end
it "removes select elements from partitions" do
db = DODB::CachedSpecDataBase(Ship).new
db_ships_by_class = db.new_partition "class", &.klass
Ship.all_ships.each do |ship|
db << ship
end
db_ships_by_class.delete "Mutsuki", &.name.==("Kisaragi")
Ship.all_ships.map(&.klass).uniq.each do |klass|
partition = db_ships_by_class.get klass
partition.any?(&.name.==("Kisaragi")).should be_false
end
db.rm_storage_dir
end
end
describe "tags" do
it "do basic tagging" do
db = DODB::CachedSpecDataBase(Ship).new
db_ships_by_tags = db.new_tags "tags", &.tags
Ship.all_ships.each do |ship|
db << ship
end
db_ships_by_tags.get("flagship").should eq([Ship.flagship])
# All returned entries should have the requested tag.
db_ships_by_tags.get("name ship")
.map(&.tags.includes?("name ship"))
.reduce { |a, e| a && e }
.should be_true
# There shouldnt be one in our data about WWII Japanese warships…
db_ships_by_tags.get?("starship").should be_nil
db.rm_storage_dir
end
it "properly removes tags" do
db = DODB::CachedSpecDataBase(Ship).new
db_ships_by_tags = db.new_tags "tags", &.tags
Ship.all_ships.each do |ship|
db << ship
end
# Removing the “flagship” tag, brace for impact.
flagship, index = db_ships_by_tags.get_with_indice("flagship")[0]
flagship = flagship.clone
flagship.tags = [] of String
db[index] = flagship
# ship, index = db_ships_by_tags.update(tag: "flagship") do |ship, index|
# ship.tags = [] of String
# db[index] = ship
# end
db_ships_by_tags.get("flagship").should eq([] of Ship)
db.rm_storage_dir
end
it "gets items that have multiple tags" do
db = DODB::CachedSpecDataBase(Ship).new
db_ships_by_tags = db.new_tags "tags", &.tags
Ship.all_ships.each do |ship|
db << ship
end
results = db_ships_by_tags.get(["flagship", "name ship"])
results.should eq([Ship.yamato])
results = db_ships_by_tags.get(["name ship", "flagship"])
results.should eq([Ship.yamato])
results = db_ships_by_tags.get(["flagship"])
results.should eq([Ship.yamato])
db.rm_storage_dir
end
end
describe "atomic operations" do
it "safe_get and safe_get?" do
db = DODB::CachedSpecDataBase(Ship).new
db_ships_by_name = db.new_index "name", &.name
Ship.all_ships.each do |ship|
db << ship
end
Ship.all_ships.each do |ship|
db_ships_by_name.safe_get ship.name do |results|
results.should eq(ship)
end
db_ships_by_name.safe_get? ship.name do |results|
results.should eq(ship)
end
end
db.rm_storage_dir
end
end
describe "tools" do
it "rebuilds indexes" do
db = DODB::CachedSpecDataBase(Ship).new
db_ships_by_name = db.new_index "name", &.name
db_ships_by_class = db.new_partition "class", &.klass
db_ships_by_tags = db.new_tags "tags", &.tags
Ship.all_ships.each do |ship|
db << ship
end
db.reindex_everything!
Ship.all_ships.each do |ship|
db_ships_by_name.get?(ship.name).should eq(ship)
db_ships_by_class.get(ship.klass).should contain(ship)
end
db.rm_storage_dir
end
it "migrates properly" do
old_db = DODB::CachedSpecDataBase(PrimitiveShip).new "-migration-origin"
old_ships_by_name = old_db.new_index "name", &.name
old_ships_by_class = old_db.new_partition "class", &.class_name
PrimitiveShip.all_ships.each do |ship|
old_db << ship
end
# At this point, the “old” DB is filled. Now we need to convert
# to the new DB.
new_db = DODB::CachedSpecDataBase(Ship).new "-migration-target"
new_ships_by_name = new_db.new_index "name", &.name
new_ships_by_class = new_db.new_partition "class", &.klass
new_ships_by_tags = new_db.new_tags "tags", &.tags
old_db.each_with_index do |ship, index|
new_ship = Ship.new ship.name,
klass: ship.class_name,
id: ship.id,
tags: Array(String).new.tap { |tags|
tags << "name ship" if ship.name == ship.class_name
}
new_db[index] = new_ship
end
# At this point, the conversion is done, so… were making a few
# arbitrary tests on the new data.
old_db.each_with_index do |old_ship, old_index|
ship = new_db[old_index]
ship.id.should eq(old_ship.id)
ship.klass.should eq(old_ship.class_name)
ship.tags.any?(&.==("name ship")).should be_true if ship.name == ship.klass
end
old_db.rm_storage_dir
new_db.rm_storage_dir
end
end
end

17
spec/utilities.cr Normal file
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@ -0,0 +1,17 @@
def perform_something(&block)
start = Time.monotonic
yield
Time.monotonic - start
end
def perform_benchmark_average(ntimes : Int32, &block)
i = 1
sum = Time::Span.zero
while i <= ntimes
elapsed_time = perform_something &block
sum += elapsed_time
i += 1
end
sum / ntimes
end