spec/util_bitcompat_spec.lua
author Matthew Wild <mwild1@gmail.com>
Tue, 11 Oct 2022 11:37:55 +0100
changeset 12767 d26eefe98d09
parent 12370 c640717e01ca
child 13453 9912baa541c0
permissions -rw-r--r--
util.dbuffer: Add efficient shortcuts for discard() in certain cases If the buffer is already empty, nothing to do. If we're throwing away the whole buffer, we can just empty it and avoid read_chunk() (which in turn may collapse()). These shortcuts are much more efficient.
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describe("util.bitcompat", function ()
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	-- bitcompat will pass through to an appropriate implementation. Our
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	-- goal here is to check that whatever implementation is in use passes
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	-- these basic sanity checks.
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	local bit = require "util.bitcompat";
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	it("bor works", function ()
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		assert.equal(0xF0FF, bit.bor(0xF000, 0x00F0, 0x000F));
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	end);
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	it("band works", function ()
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		assert.equal(0x0F, bit.band(0xFF, 0x1F, 0x0F));
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	end);
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	it("bxor works", function ()
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		assert.equal(0x13, bit.bxor(0x10, 0x0F, 0x0C));
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	end);
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	it("rshift works", function ()
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		assert.equal(0x0F, bit.rshift(0xFF, 4));
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	end);
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	it("lshift works", function ()
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		assert.equal(0xFF00, bit.lshift(0xFF, 8));
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	end);
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end);