spec/util_ringbuffer_spec.lua
author Matthew Wild <mwild1@gmail.com>
Mon, 20 Feb 2023 18:10:15 +0000
branch0.12
changeset 12898 0598d822614f
parent 10964 f84e0e2faae2
permissions -rw-r--r--
mod_websocket: Fire pre-session-close event (fixes #1800) This event was added in a7c183bb4e64 and is required to make mod_smacks know that a session was intentionally closed and shouldn't be hibernated (see fcea4d9e7502). Because this was missing from mod_websocket's session.close(), mod_smacks would always attempt to hibernate websocket sessions even if they closed cleanly. That mod_websocket has its own copy of session.close() is something to fix another day (probably not in the stable branch). So for now this commit makes the minimal change to get things working again. Thanks to Damian and the Jitsi team for reporting.

local rb = require "util.ringbuffer";
describe("util.ringbuffer", function ()
	describe("#new", function ()
		it("has a constructor", function ()
			assert.Function(rb.new);
		end);
		it("can be created", function ()
			assert.truthy(rb.new());
		end);
		it("won't create an empty buffer", function ()
			assert.has_error(function ()
				rb.new(0);
			end);
		end);
		it("won't create a negatively sized buffer", function ()
			assert.has_error(function ()
				rb.new(-1);
			end);
		end);
	end);
	describe(":write", function ()
		local b = rb.new();
		it("works", function ()
			assert.truthy(b:write("hi"));
		end);
	end);

	describe(":discard", function ()
		local b = rb.new();
		it("works", function ()
			assert.truthy(b:write("hello world"));
			assert.truthy(b:discard(6));
			assert.equal(5, #b);
			assert.equal("world", b:read(5));
		end);
	end);

	describe(":sub", function ()
		-- Helper function to compare buffer:sub() with string:sub()
		local function test_sub(b, x, y)
			local s = b:read(#b, true);
			local string_result, buffer_result = s:sub(x, y), b:sub(x, y);
			assert.equals(string_result, buffer_result, ("buffer:sub(%d, %s) does not match string:sub()"):format(x, y and ("%d"):format(y) or "nil"));
		end

		it("works", function ()
			local b = rb.new();
			assert.truthy(b:write("hello world"));
			assert.equals("hello", b:sub(1, 5));
		end);

		it("supports optional end parameter", function ()
			local b = rb.new();
			assert.truthy(b:write("hello world"));
			assert.equals("hello world", b:sub(1));
			assert.equals("world", b:sub(-5));
		end);

		it("is equivalent to string:sub", function ()
			local b = rb.new(6);
			assert.truthy(b:write("foobar"));
			b:read(3);
			b:write("foo");
			for i = -13, 13 do
				for j = -13, 13 do
					test_sub(b, i, j);
				end
			end
		end);
	end);

	describe(":byte", function ()
		-- Helper function to compare buffer:byte() with string:byte()
		local function test_byte(b, x, y)
			local s = b:read(#b, true);
			local string_result, buffer_result = {s:byte(x, y)}, {b:byte(x, y)};
			assert.same(string_result, buffer_result, ("buffer:byte(%d, %s) does not match string:byte()"):format(x, y and ("%d"):format(y) or "nil"));
		end

		it("is equivalent to string:byte", function ()
			local b = rb.new(6);
			assert.truthy(b:write("foobar"));
			b:read(3);
			b:write("foo");
			test_byte(b, 1);
			test_byte(b, 3);
			test_byte(b, -1);
			test_byte(b, -3);
			for i = -13, 13 do
				for j = -13, 13 do
					test_byte(b, i, j);
				end
			end
		end);

		it("works with characters > 127", function ()
			local b = rb.new();
			b:write(string.char(0, 140));
			local r = { b:byte(1, 2) };
			assert.same({ 0, 140 }, r);
		end);
	end);
end);