File

spec/util_datamanager_spec.lua @ 13134:638f627e707f

util.datamanager: Add O(1) list indexing with on-disk index Index file contains offsets and lengths of each item() which allows seeking directly to each item and reading it without parsing the entire file. Also allows tricks like binary search, assuming items have some defined order. We take advantage of the 1-based indexing in tables to store a magic header in the 0 position, so that table index 1 ends up at file index 1.
author Kim Alvefur <zash@zash.se>
date Tue, 11 May 2021 02:09:56 +0200
parent 11370:7c2ef5a1ec9c
line wrap: on
line source

describe("util.datamanager", function()
	local dm;
	setup(function()
		dm = require "util.datamanager";
		dm.set_data_path("./data");
	end);

	describe("keyvalue", function()
		local data = {hello = "world"};

		do
			local ok, err = dm.store("keyval-user", "datamanager.test", "testdata", data);
			assert.truthy(ok, err);
		end

		do
			local read, err = dm.load("keyval-user", "datamanager.test", "testdata")
			assert.same(data, read, err);
		end

		do
			local ok, err = dm.store("keyval-user", "datamanager.test", "testdata", nil);
			assert.truthy(ok, err);
		end

		do
			local read, err = dm.load("keyval-user", "datamanager.test", "testdata")
			assert.is_nil(read, err);
		end
	end)

	describe("lists", function()
		do
			local ok, err = dm.list_store("list-user", "datamanager.test", "testdata", {});
			assert.truthy(ok, err);
		end

		do
			local nothing, err = dm.list_load("list-user", "datamanager.test", "testdata");
			assert.is_nil(nothing, err);
			assert.is_nil(err);
		end

		do
			local ok, err = dm.list_append("list-user", "datamanager.test", "testdata", {id = 1});
			assert.truthy(ok, err);
		end

		do
			local ok, err = dm.list_append("list-user", "datamanager.test", "testdata", {id = 2});
			assert.truthy(ok, err);
		end

		do
			local ok, err = dm.list_append("list-user", "datamanager.test", "testdata", {id = 3});
			assert.truthy(ok, err);
		end

		do
			local list, err = dm.list_load("list-user", "datamanager.test", "testdata");
			assert.same(list, {{id = 1}; {id = 2}; {id = 3}}, err);
		end

		do
			local ok, err = dm.list_store("list-user", "datamanager.test", "testdata", {});
			assert.truthy(ok, err);
		end

		do
			local nothing, err = dm.list_load("list-user", "datamanager.test", "testdata");
			assert.is_nil(nothing, err);
			assert.is_nil(err);
		end

	end)
end)