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spec/util_dbuffer_spec.lua @ 11636:11e0a0a08da3
util.dbuffer: Add read_until() method
author | Matthew Wild <mwild1@gmail.com> |
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date | Tue, 29 Jun 2021 13:48:14 +0100 (2021-06-29) |
parent | 11158:3a72cb126d6c |
child | 11637:19cddf92fcc2 |
rev | line source |
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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()); | |
9 end); | |
10 it("won't create an empty buffer", function () | |
11 assert.falsy(dbuffer.new(0)); | |
12 end); | |
13 it("won't create a negatively sized buffer", function () | |
14 assert.falsy(dbuffer.new(-1)); | |
15 end); | |
16 end); | |
17 describe(":write", function () | |
18 local b = dbuffer.new(); | |
19 it("works", function () | |
20 assert.truthy(b:write("hi")); | |
21 end); | |
22 end); | |
23 | |
24 describe(":read", function () | |
25 it("supports optional bytes parameter", function () | |
26 -- should return the frontmost chunk | |
27 local b = dbuffer.new(); | |
28 assert.truthy(b:write("hello")); | |
29 assert.truthy(b:write(" ")); | |
30 assert.truthy(b:write("world")); | |
31 assert.equal("h", b:read(1)); | |
32 | |
33 assert.equal("ello", b:read()); | |
34 assert.equal(" ", b:read()); | |
35 assert.equal("world", b:read()); | |
36 end); | |
37 end); | |
38 | |
11636
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39 describe(":read_until", function () |
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40 it("works", function () |
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41 local b = dbuffer.new(); |
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42 b:write("hello\n"); |
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43 b:write("world"); |
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44 b:write("\n"); |
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45 b:write("\n\n"); |
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46 b:write("stuff"); |
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47 b:write("more\nand more"); |
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48 |
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49 assert.equal(nil, b:read_until(".")); |
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50 assert.equal(nil, b:read_until("%")); |
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51 assert.equal("hello\n", b:read_until("\n")); |
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52 assert.equal("world\n", b:read_until("\n")); |
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53 assert.equal("\n", b:read_until("\n")); |
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54 assert.equal("\n", b:read_until("\n")); |
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55 assert.equal("stu", b:read(3)); |
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56 assert.equal("ffmore\n", b:read_until("\n")); |
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57 assert.equal(nil, b:read_until("\n")); |
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58 assert.equal("and more", b:read_chunk()); |
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59 end); |
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60 |
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61 it("works with multi-character sequences", function () |
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62 local b = dbuffer.new(); |
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63 b:write("hello\r\n"); |
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64 b:write("world"); |
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65 b:write("\r\n"); |
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66 b:write("\r\n\r\n"); |
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67 b:write("stuff"); |
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68 b:write("more\r\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\r\n", b:read_until("\r\n")); |
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73 assert.equal("world\r\n", b:read_until("\r\n")); |
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74 assert.equal("\r\n", b:read_until("\r\n")); |
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75 assert.equal("\r\n", b:read_until("\r\n")); |
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76 assert.equal("stu", b:read(3)); |
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77 assert.equal("ffmore\r\n", b:read_until("\r\n")); |
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78 assert.equal(nil, b:read_until("\r\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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util.dbuffer: Expose length as :len() method, like strings
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89 assert.equal(5, b:len()); |
11105 | 90 assert.equal("world", b:read(5)); |
91 end); | |
92 end); | |
93 | |
94 describe(":collapse()", function () | |
95 it("works on an empty buffer", function () | |
96 local b = dbuffer.new(); | |
97 b:collapse(); | |
98 end); | |
99 end); | |
100 | |
101 describe(":sub", function () | |
102 -- Helper function to compare buffer:sub() with string:sub() | |
103 local s = "hello world"; | |
104 local function test_sub(b, x, y) | |
105 local string_result, buffer_result = s:sub(x, y), b:sub(x, y); | |
106 assert.equals(string_result, buffer_result, ("buffer:sub(%d, %s) does not match string:sub()"):format(x, y and ("%d"):format(y) or "nil")); | |
107 end | |
108 | |
109 it("works", function () | |
110 local b = dbuffer.new(); | |
111 assert.truthy(b:write("hello world")); | |
112 assert.equals("hello", b:sub(1, 5)); | |
113 end); | |
114 | |
115 it("works after discard", function () | |
116 local b = dbuffer.new(256); | |
117 assert.truthy(b:write("foobar")); | |
118 assert.equals("foobar", b:sub(1, 6)); | |
119 assert.truthy(b:discard(3)); -- consume "foo" | |
120 assert.equals("bar", b:sub(1, 3)); | |
121 end); | |
122 | |
123 it("supports optional end parameter", function () | |
124 local b = dbuffer.new(); | |
125 assert.truthy(b:write("hello world")); | |
126 assert.equals("hello world", b:sub(1)); | |
127 assert.equals("world", b:sub(-5)); | |
128 end); | |
129 | |
130 it("is equivalent to string:sub", function () | |
131 local b = dbuffer.new(11); | |
132 assert.truthy(b:write(s)); | |
133 for i = -13, 13 do | |
134 for j = -13, 13 do | |
135 test_sub(b, i, j); | |
136 end | |
137 end | |
138 end); | |
139 end); | |
140 | |
141 describe(":byte", function () | |
142 -- Helper function to compare buffer:byte() with string:byte() | |
143 local s = "hello world" | |
144 local function test_byte(b, x, y) | |
145 local string_result, buffer_result = {s:byte(x, y)}, {b:byte(x, y)}; | |
146 assert.same(string_result, buffer_result, ("buffer:byte(%d, %s) does not match string:byte()"):format(x, y and ("%d"):format(y) or "nil")); | |
147 end | |
148 | |
149 it("is equivalent to string:byte", function () | |
150 local b = dbuffer.new(11); | |
151 assert.truthy(b:write(s)); | |
152 test_byte(b, 1); | |
153 test_byte(b, 3); | |
154 test_byte(b, -1); | |
155 test_byte(b, -3); | |
156 for i = -13, 13 do | |
157 for j = -13, 13 do | |
158 test_byte(b, i, j); | |
159 end | |
160 end | |
161 end); | |
162 | |
163 it("works with characters > 127", function () | |
164 local b = dbuffer.new(); | |
165 b:write(string.char(0, 140)); | |
166 local r = { b:byte(1, 2) }; | |
167 assert.same({ 0, 140 }, r); | |
168 end); | |
169 | |
170 it("works on an empty buffer", function () | |
171 local b = dbuffer.new(); | |
172 assert.equal("", b:sub(1,1)); | |
173 end); | |
174 end); | |
175 end); |