123 lines
3.9 KiB
Crystal
123 lines
3.9 KiB
Crystal
require "spec"
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require "./db-cars.cr"
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# NOTE: the following tests access both database and triggers' caches directly.
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# It must not be done in real applications.
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# `data` and `lru` properties are implementation details.
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describe "SPECDB::Common" do
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it "basics, 3 values" do
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car0 = Car.new "Corvet-0", "red", [] of String
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car1 = Car.new "Corvet-1", "red", [] of String
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car2 = Car.new "Corvet-2", "red", [] of String
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car3 = Car.new "Corvet-3", "red", [] of String
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db = SPECDB::Common(Car).new "", 3
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db.data.keys.sort.should eq([] of Int32)
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db << car0
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db.data.keys.sort.should eq([0] of Int32)
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db << car1
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db.data.keys.sort.should eq([0, 1] of Int32)
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db << car2
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db.data.keys.sort.should eq([0, 1, 2] of Int32)
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db[0] # Let's use the first value, it shouldn't be the one to be dropped.
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db << car3
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db.data.keys.sort.should eq([0, 2, 3] of Int32)
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db.lru.to_s.should eq "[ 3, 0, 2 ]"
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db.delete 2
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db.data.keys.sort.should eq([0, 3] of Int32)
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db.lru.to_s.should eq "[ 3, 0 ]"
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end
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it "add some values, reindex, check the values" do
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car0 = Car.new "Corvet-0", "red", [] of String
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car1 = Car.new "Corvet-1", "red", [] of String
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car2 = Car.new "Corvet-2", "red", [] of String
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car3 = Car.new "Corvet-3", "red", [] of String
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db = SPECDB::Common(Car).new "reindex", 2
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index_name = db.new_index "name", &.name
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index_color = db.new_partition "color", &.color
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db.data.keys.sort.should eq([] of Int32)
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db << car0
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db.data.keys.sort.should eq([0] of Int32)
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db << car1
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db.data.keys.sort.should eq([0, 1] of Int32)
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db.lru.to_s.should eq "[ 1, 0 ]"
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db.data.keys.sort.should eq([0, 1] of Int32)
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db.lru.to_s.should eq "[ 1, 0 ]"
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db << car2
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db.data.keys.sort.should eq([1, 2] of Int32)
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db.lru.to_s.should eq "[ 2, 1 ]"
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db[0] # Let's use the first value, it shouldn't be the one to be dropped.
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db << car3
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db.data.keys.sort.should eq([0, 3] of Int32)
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db.lru.to_s.should eq "[ 3, 0 ]"
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# Actually remove the value indexed "2".
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db.delete 2
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# The "delete" action actually puts the value in the cache before removing it.
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db.data.keys.sort.should eq([3] of Int32)
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db.lru.to_s.should eq "[ 3 ]"
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# db2: further tests for the LRU behavior, with `reindex_everything!` for example.
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db2 = SPECDB::Common(Car).new "reindex", 2, false
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index2_name = db2.new_index "name", &.name
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# For now, we didn't use any value in the database.
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# Also, triggers should have empty caches.
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db2.data.keys.sort.should eq([] of Int32)
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db2.lru.to_s.should eq "[ ]"
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index2_name.get?("Corvet-0").should eq car0
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# Reindex removes all triggers (hard rm -rf trigger-dir) then reads all
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# data from the file-system to run the triggers. Data is put into the cache
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# of the `Common` database.
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db2.reindex_everything!
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# Values 1 and 3 are the last recently used values following `reindex_everything!`.
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db2.data.keys.sort.should eq([1, 3] of Int32)
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db2.lru.to_s.should eq "[ 3, 1 ]"
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total_values = 0
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db2.each_with_key do |v, k|
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total_values += 1
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end
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total_values.should eq 3
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# db3: no need for a reindex to access values from the database,
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# with `each` or `each_with_key` for example.
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db3 = SPECDB::Common(Car).new "reindex", 2, false
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total_values = 0
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db3.each do |v|
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total_values += 1
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end
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total_values.should eq 3
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# db4: no need for a reindex to access values from triggers.
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db4 = SPECDB::Common(Car).new "reindex", 2, false
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index4_name = db4.new_index "name", &.name
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index4_color = db4.new_partition "color", &.color
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index4_name.data.size.should eq 0 # trigger cache is empty
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index4_name.get?("Corvet-3").should eq car3
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index4_name.data.size.should eq 1 # trigger cache: one value, Corvet-3
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index4_color.data.size.should eq 0 # trigger cache is empty
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index4_color.get("red").size.should eq 3 # read from the disk
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index4_color.data.size.should eq 1 # trigger cache: 1, the color "red"
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index4_color.data["red"].size.should eq 3 # 3 values in "red"
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end
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end
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