prosody
d009a79f723a
spec/util_ringbuffer_spec.lua

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spec/util_ringbuffer_spec.lua @ 10904:d009a79f723a

util.human.io: Remove padding option and use $COLUMNS as default width
author Matthew Wild <mwild1@gmail.com>
date Thu, 04 Jun 2020 17:24:30 +0100
parent 10901:5e33926f4b43
child 10949:8b5b35baf370
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10897
37df1e757f02 util.ringbuffer: Add some initial tests
Kim Alvefur <zash@zash.se>
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1 local rb = require "util.ringbuffer";
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2 describe("util.ringbuffer", function ()
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3 describe("#new", function ()
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4 it("has a constructor", function ()
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5 assert.Function(rb.new);
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6 end);
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7 it("can be created", function ()
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8 assert.truthy(rb.new());
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9 end);
10898
c6465fb3c839 util.ringbuffer: Prevent creation of zero-size buffer
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10 it("won't create an empty buffer", function ()
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11 assert.has_error(function ()
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12 rb.new(0);
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13 end);
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14 end);
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15 it("won't create a negatively sized buffer", function ()
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16 assert.has_error(function ()
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17 rb.new(-1);
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18 end);
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19 end);
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20 end);
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21 describe(":write", function ()
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22 local b = rb.new();
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23 it("works", function ()
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24 assert.truthy(b:write("hi"));
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25 end);
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26 end);
10901
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27 describe(":sub", function ()
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28 -- Helper function to compare buffer:sub() with string:sub()
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29 local function test_sub(b, x, y)
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30 local s = b:read(#b, true);
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31 local string_result, buffer_result = s:sub(x, y), b:sub(x, y);
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32 assert.equals(string_result, buffer_result, ("buffer:sub(%d, %s) does not match string:sub()"):format(x, y and ("%d"):format(y) or "nil"));
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33 end
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34
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35 it("works", function ()
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36 local b = rb.new();
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37 b:write("hello world");
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38 assert.equals("hello", b:sub(1, 5));
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39 end);
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40
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41 it("supports optional end parameter", function ()
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42 local b = rb.new();
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43 b:write("hello world");
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44 assert.equals("hello world", b:sub(1));
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45 assert.equals("world", b:sub(-5));
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46 end);
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47
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48 it("is equivalent to string:sub", function ()
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49 local b = rb.new(6);
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50 b:write("foobar");
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51 b:read(3);
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52 b:write("foo");
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53 for i = -13, 13 do
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54 for j = -13, 13 do
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55 test_sub(b, i, j);
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56 end
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57 end
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58 end);
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59 end);
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60
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61 describe(":byte", function ()
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62 -- Helper function to compare buffer:byte() with string:byte()
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63 local function test_byte(b, x, y)
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64 local s = b:read(#b, true);
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65 local string_result, buffer_result = {s:byte(x, y)}, {b:byte(x, y)};
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66 assert.same(string_result, buffer_result, ("buffer:byte(%d, %s) does not match string:byte()"):format(x, y and ("%d"):format(y) or "nil"));
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67 end
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68
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69 it("is equivalent to string:byte", function ()
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70 local b = rb.new(6);
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71 b:write("foobar");
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72 b:read(3);
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73 b:write("foo");
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74 test_byte(b, 1);
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75 test_byte(b, 3);
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76 test_byte(b, -1);
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77 test_byte(b, -3);
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78 for i = -13, 13 do
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79 for j = -13, 13 do
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80 test_byte(b, i, j);
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81 end
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82 end
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83 end);
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84 end);
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85 end);