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spec/util_dbuffer_spec.lua @ 12764:bf6d2f9fad4d
util.dbuffer: Add a bunch of missing test cases
Found via mutation testing.
| author | Matthew Wild <mwild1@gmail.com> |
|---|---|
| date | Tue, 11 Oct 2022 11:38:32 +0100 |
| parent | 11637:19cddf92fcc2 |
| rev | line source |
|---|---|
| 11105 | 1 local dbuffer = require "util.dbuffer"; |
| 2 describe("util.dbuffer", function () | |
| 3 describe("#new", function () | |
| 4 it("has a constructor", function () | |
| 5 assert.Function(dbuffer.new); | |
| 6 end); | |
| 7 it("can be created", function () | |
| 8 assert.truthy(dbuffer.new()); | |
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9 assert.truthy(dbuffer.new(1)); |
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10 assert.truthy(dbuffer.new(1024)); |
| 11105 | 11 end); |
| 12 it("won't create an empty buffer", function () | |
| 13 assert.falsy(dbuffer.new(0)); | |
| 14 end); | |
| 15 it("won't create a negatively sized buffer", function () | |
| 16 assert.falsy(dbuffer.new(-1)); | |
| 17 end); | |
| 18 end); | |
| 19 describe(":write", function () | |
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20 local b = dbuffer.new(10, 3); |
| 11105 | 21 it("works", function () |
| 22 assert.truthy(b:write("hi")); | |
| 23 end); | |
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24 it("fails when the buffer is full", function () |
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25 local ret = b:write(" there world, this is a long piece of data"); |
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26 assert.is_falsy(ret); |
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27 end); |
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28 it("works when max_chunks is reached", function () |
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29 -- Chunks are an optimization, dbuffer should collapse chunks when needed |
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30 for _ = 1, 8 do |
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31 assert.truthy(b:write("!")); |
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32 end |
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33 assert.falsy(b:write("!")); -- Length reached |
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34 end); |
| 11105 | 35 end); |
| 36 | |
| 37 describe(":read", function () | |
| 38 it("supports optional bytes parameter", function () | |
| 39 -- should return the frontmost chunk | |
| 40 local b = dbuffer.new(); | |
| 41 assert.truthy(b:write("hello")); | |
| 42 assert.truthy(b:write(" ")); | |
| 43 assert.truthy(b:write("world")); | |
| 44 assert.equal("h", b:read(1)); | |
| 45 | |
| 46 assert.equal("ello", b:read()); | |
| 47 assert.equal(" ", b:read()); | |
| 48 assert.equal("world", b:read()); | |
| 49 end); | |
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50 it("fails when there is not enough data in the buffer", function () |
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51 local b = dbuffer.new(12); |
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52 b:write("hello"); |
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53 b:write(" "); |
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54 b:write("world"); |
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55 assert.is_falsy(b:read(12)); |
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56 assert.is_falsy(b:read(13)); |
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57 end); |
| 11105 | 58 end); |
| 59 | |
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60 describe(":read_until", function () |
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61 it("works", function () |
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62 local b = dbuffer.new(); |
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63 b:write("hello\n"); |
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64 b:write("world"); |
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65 b:write("\n"); |
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66 b:write("\n\n"); |
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67 b:write("stuff"); |
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68 b:write("more\nand more"); |
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69 |
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70 assert.equal(nil, b:read_until(".")); |
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71 assert.equal(nil, b:read_until("%")); |
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72 assert.equal("hello\n", b:read_until("\n")); |
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73 assert.equal("world\n", b:read_until("\n")); |
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74 assert.equal("\n", b:read_until("\n")); |
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75 assert.equal("\n", b:read_until("\n")); |
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76 assert.equal("stu", b:read(3)); |
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77 assert.equal("ffmore\n", b:read_until("\n")); |
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78 assert.equal(nil, b:read_until("\n")); |
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79 assert.equal("and more", b:read_chunk()); |
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80 end); |
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81 end); |
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82 |
| 11105 | 83 describe(":discard", function () |
| 84 local b = dbuffer.new(); | |
| 85 it("works", function () | |
| 86 assert.truthy(b:write("hello world")); | |
| 87 assert.truthy(b:discard(6)); | |
| 88 assert.equal(5, b:length()); | |
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89 assert.equal(5, b:len()); |
| 11105 | 90 assert.equal("world", b:read(5)); |
| 91 end); | |
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92 it("works across chunks", function () |
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93 assert.truthy(b:write("hello")); |
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94 assert.truthy(b:write(" ")); |
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95 assert.truthy(b:write("world")); |
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96 assert.truthy(b:discard(3)); |
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97 assert.equal(8, b:length()); |
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98 assert.truthy(b:discard(3)); |
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99 assert.equal(5, b:length()); |
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100 assert.equal("world", b:read(5)); |
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101 end); |
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102 it("can discard the entire buffer", function () |
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103 assert.equal(b:len(), 0); |
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104 assert.truthy(b:write("hello world")); |
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105 assert.truthy(b:discard(11)); |
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106 assert.equal(0, b:len()); |
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107 assert.truthy(b:write("hello world")); |
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108 assert.truthy(b:discard(12)); |
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109 assert.equal(0, b:len()); |
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110 assert.truthy(b:write("hello world")); |
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111 assert.truthy(b:discard(128)); |
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112 assert.equal(0, b:len()); |
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113 end); |
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114 it("works on an empty buffer", function () |
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115 assert.truthy(dbuffer.new():discard()); |
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116 assert.truthy(dbuffer.new():discard(0)); |
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117 assert.truthy(dbuffer.new():discard(1)); |
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118 end); |
| 11105 | 119 end); |
| 120 | |
| 121 describe(":collapse()", function () | |
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122 it("works", function () |
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123 local b = dbuffer.new(); |
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124 b:write("hello"); |
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125 b:write(" "); |
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126 b:write("world"); |
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127 b:collapse(6); |
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128 local ret, bytes = b:read_chunk(); |
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129 assert.equal("hello ", ret); |
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130 assert.equal(6, bytes); |
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131 end); |
| 11105 | 132 it("works on an empty buffer", function () |
| 133 local b = dbuffer.new(); | |
| 134 b:collapse(); | |
| 135 end); | |
| 136 end); | |
| 137 | |
| 138 describe(":sub", function () | |
| 139 -- Helper function to compare buffer:sub() with string:sub() | |
| 140 local s = "hello world"; | |
| 141 local function test_sub(b, x, y) | |
| 142 local string_result, buffer_result = s:sub(x, y), b:sub(x, y); | |
| 143 assert.equals(string_result, buffer_result, ("buffer:sub(%d, %s) does not match string:sub()"):format(x, y and ("%d"):format(y) or "nil")); | |
| 144 end | |
| 145 | |
| 146 it("works", function () | |
| 147 local b = dbuffer.new(); | |
| 148 assert.truthy(b:write("hello world")); | |
| 149 assert.equals("hello", b:sub(1, 5)); | |
| 150 end); | |
| 151 | |
| 152 it("works after discard", function () | |
| 153 local b = dbuffer.new(256); | |
| 154 assert.truthy(b:write("foobar")); | |
| 155 assert.equals("foobar", b:sub(1, 6)); | |
| 156 assert.truthy(b:discard(3)); -- consume "foo" | |
| 157 assert.equals("bar", b:sub(1, 3)); | |
| 158 end); | |
| 159 | |
| 160 it("supports optional end parameter", function () | |
| 161 local b = dbuffer.new(); | |
| 162 assert.truthy(b:write("hello world")); | |
| 163 assert.equals("hello world", b:sub(1)); | |
| 164 assert.equals("world", b:sub(-5)); | |
| 165 end); | |
| 166 | |
| 167 it("is equivalent to string:sub", function () | |
| 168 local b = dbuffer.new(11); | |
| 169 assert.truthy(b:write(s)); | |
| 170 for i = -13, 13 do | |
| 171 for j = -13, 13 do | |
| 172 test_sub(b, i, j); | |
| 173 end | |
| 174 end | |
| 175 end); | |
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176 |
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177 it("works on an empty buffer", function () |
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178 local b = dbuffer.new(); |
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179 assert.equal("", b:sub(1, 12)); |
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180 end); |
| 11105 | 181 end); |
| 182 | |
| 183 describe(":byte", function () | |
| 184 -- Helper function to compare buffer:byte() with string:byte() | |
| 185 local s = "hello world" | |
| 186 local function test_byte(b, x, y) | |
| 187 local string_result, buffer_result = {s:byte(x, y)}, {b:byte(x, y)}; | |
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188 assert.same( |
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189 string_result, |
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util.dbuffer: Add a bunch of missing test cases
Matthew Wild <mwild1@gmail.com>
parents:
11637
diff
changeset
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190 buffer_result, |
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bf6d2f9fad4d
util.dbuffer: Add a bunch of missing test cases
Matthew Wild <mwild1@gmail.com>
parents:
11637
diff
changeset
|
191 ("buffer:byte(%s, %s) does not match string:byte()"):format(x and ("%d"):format(x) or "nil", y and ("%d"):format(y) or "nil") |
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bf6d2f9fad4d
util.dbuffer: Add a bunch of missing test cases
Matthew Wild <mwild1@gmail.com>
parents:
11637
diff
changeset
|
192 ); |
| 11105 | 193 end |
| 194 | |
| 195 it("is equivalent to string:byte", function () | |
| 196 local b = dbuffer.new(11); | |
| 197 assert.truthy(b:write(s)); | |
| 198 test_byte(b, 1); | |
| 199 test_byte(b, 3); | |
| 200 test_byte(b, -1); | |
| 201 test_byte(b, -3); | |
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bf6d2f9fad4d
util.dbuffer: Add a bunch of missing test cases
Matthew Wild <mwild1@gmail.com>
parents:
11637
diff
changeset
|
202 test_byte(b, nil, 5); |
| 11105 | 203 for i = -13, 13 do |
| 204 for j = -13, 13 do | |
| 205 test_byte(b, i, j); | |
| 206 end | |
| 207 end | |
| 208 end); | |
| 209 | |
| 210 it("works with characters > 127", function () | |
| 211 local b = dbuffer.new(); | |
| 212 b:write(string.char(0, 140)); | |
| 213 local r = { b:byte(1, 2) }; | |
| 214 assert.same({ 0, 140 }, r); | |
| 215 end); | |
| 216 | |
| 217 it("works on an empty buffer", function () | |
| 218 local b = dbuffer.new(); | |
| 219 assert.equal("", b:sub(1,1)); | |
| 220 end); | |
| 221 end); | |
| 222 end); |
