File

spec/util_indexedbheap_spec.lua @ 12630:781772c8b6d9

mod_mam: Store archives with sub-second precision timestamps Changes sub-second part of example timestamp to .5 in order to avoid floating point issues. Some clients use timestamps when ordering messages which can lead to messages having the same timestamp ending up in the wrong order. It would be better to preserve the order messages are sent in, which is the order they were stored in.
author Kim Alvefur <zash@zash.se>
date Sun, 14 Aug 2022 17:28:31 +0200
parent 11116:d334f2bebe55
line wrap: on
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local ibh = require"util.indexedbheap";

local function verify_heap_property(priorities)
	for k in ipairs(priorities) do
		local parent = priorities[k];
		local childA = priorities[2*k];
		local childB = priorities[2*k+1];
		-- print("-", parent, childA, childB)
		assert(childA == nil or childA > parent, "heap property violated");
		assert(childB == nil or childB > parent, "heap property violated");
	end
end

local h
setup(function ()
	h = ibh.create();
end)
describe("util.indexedbheap", function ()
	it("item can be moved from end to top", function ()
		verify_heap_property(h);
		h:insert("a", 1);
		verify_heap_property(h);
		h:insert("b", 2);
		verify_heap_property(h);
		h:insert("c", 3);
		verify_heap_property(h);
		local id = h:insert("*", 10);
		verify_heap_property(h);
		h:reprioritize(id, 0);
		verify_heap_property(h);
		assert.same({ 0, "*", id }, { h:pop() });
	end)
end);