prosody
9970d333a63f
spec/util_strbitop_spec.lua

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spec/util_strbitop_spec.lua @ 13532:9970d333a63f

mod_pubsub: Use error registry This is what util.error was made for! This replaces the custom error stanza builder with common code in util.stanza that knows enough about util.error and namespaced errors. Some awkwardness remains in the way util.pubsub returns conflicting form fields.
author Kim Alvefur <zash@zash.se>
date Sun, 27 Oct 2024 15:18:24 +0100
parent 13430:1a5e3cf037f6
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
11168
cde600e2fdf9 util.strbitop: Add tests covering basics
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1 local strbitop = require "util.strbitop";
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2 describe("util.strbitop", function ()
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3 describe("sand()", function ()
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4 it("works", function ()
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5 assert.equal(string.rep("Aa", 100), strbitop.sand(string.rep("a", 200), "Aa"));
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6 end);
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7 it("returns empty string if first argument is empty", function ()
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8 assert.equal("", strbitop.sand("", ""));
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9 assert.equal("", strbitop.sand("", "key"));
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10 end);
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11 it("returns initial string if key is empty", function ()
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12 assert.equal("hello", strbitop.sand("hello", ""));
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13 end);
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14 end);
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15
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16 describe("sor()", function ()
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17 it("works", function ()
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18 assert.equal(string.rep("a", 200), strbitop.sor(string.rep("Aa", 100), "a"));
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19 end);
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20 it("returns empty string if first argument is empty", function ()
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21 assert.equal("", strbitop.sor("", ""));
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22 assert.equal("", strbitop.sor("", "key"));
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23 end);
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24 it("returns initial string if key is empty", function ()
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25 assert.equal("hello", strbitop.sor("hello", ""));
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26 end);
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27 end);
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28
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29 describe("sxor()", function ()
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30 it("works", function ()
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31 assert.equal(string.rep("Aa", 100), strbitop.sxor(string.rep("a", 200), " \0"));
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32 end);
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33 it("returns empty string if first argument is empty", function ()
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34 assert.equal("", strbitop.sxor("", ""));
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35 assert.equal("", strbitop.sxor("", "key"));
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36 end);
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37 it("returns initial string if key is empty", function ()
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38 assert.equal("hello", strbitop.sxor("hello", ""));
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39 end);
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40 end);
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41
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42 describe("common_prefix_bits()", function ()
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43 local function B(s)
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44 assert(#s%8==0, "Invalid test input: B(s): s should be a multiple of 8 bits in length");
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45 local byte = 0;
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46 local out_str = {};
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47 for i = 1, #s do
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48 local bit_ascii = s:byte(i);
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49 if bit_ascii == 49 then -- '1'
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50 byte = byte + 2^((7-(i-1))%8);
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51 elseif bit_ascii ~= 48 then
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52 error("Invalid test input: B(s): s should contain only '0' or '1' characters");
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53 end
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54 if (i-1)%8 == 7 then
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55 table.insert(out_str, string.char(byte));
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56 byte = 0;
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57 end
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58 end
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59 return table.concat(out_str);
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60 end
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61
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62 local _cpb = strbitop.common_prefix_bits;
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63 local function test(a, b)
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64 local Ba, Bb = B(a), B(b);
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65 local ret1 = _cpb(Ba, Bb);
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66 local ret2 = _cpb(Bb, Ba);
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67 assert(ret1 == ret2, ("parameter order should not make a difference to the result (%s, %s) = %d, reversed = %d"):format(a, b, ret1, ret2));
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68 return ret1;
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69 end
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70
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71 it("works on single bytes", function ()
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72 assert.equal(0, test("00000000", "11111111"));
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73 assert.equal(1, test("10000000", "11111111"));
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74 assert.equal(0, test("01000000", "11111111"));
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75 assert.equal(0, test("01000000", "11111111"));
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76 assert.equal(8, test("11111111", "11111111"));
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77 end);
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78
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79 it("works on multiple bytes", function ()
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80 for i = 0, 16 do
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81 assert.equal(i, test(string.rep("1", i)..string.rep("0", 16-i), "1111111111111111"));
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82 end
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83 end);
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84 end);
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85 end);