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spec/util_dbuffer_spec.lua @ 11466:c098d07e6717
util.datamapper: Finally implement support for parsing arrays
author | Kim Alvefur <zash@zash.se> |
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date | Sat, 20 Mar 2021 20:45:06 +0100 |
parent | 11158:3a72cb126d6c |
child | 11636:11e0a0a08da3 |
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()); | |
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 | |
39 describe(":discard", function () | |
40 local b = dbuffer.new(); | |
41 it("works", function () | |
42 assert.truthy(b:write("hello world")); | |
43 assert.truthy(b:discard(6)); | |
44 assert.equal(5, b:length()); | |
11156
a8ef69f7fc35
util.dbuffer: Expose length as :len() method, like strings
Kim Alvefur <zash@zash.se>
parents:
11105
diff
changeset
|
45 assert.equal(5, b:len()); |
11105 | 46 assert.equal("world", b:read(5)); |
47 end); | |
48 end); | |
49 | |
50 describe(":collapse()", function () | |
51 it("works on an empty buffer", function () | |
52 local b = dbuffer.new(); | |
53 b:collapse(); | |
54 end); | |
55 end); | |
56 | |
57 describe(":sub", function () | |
58 -- Helper function to compare buffer:sub() with string:sub() | |
59 local s = "hello world"; | |
60 local function test_sub(b, x, y) | |
61 local string_result, buffer_result = s:sub(x, y), b:sub(x, y); | |
62 assert.equals(string_result, buffer_result, ("buffer:sub(%d, %s) does not match string:sub()"):format(x, y and ("%d"):format(y) or "nil")); | |
63 end | |
64 | |
65 it("works", function () | |
66 local b = dbuffer.new(); | |
67 assert.truthy(b:write("hello world")); | |
68 assert.equals("hello", b:sub(1, 5)); | |
69 end); | |
70 | |
71 it("works after discard", function () | |
72 local b = dbuffer.new(256); | |
73 assert.truthy(b:write("foobar")); | |
74 assert.equals("foobar", b:sub(1, 6)); | |
75 assert.truthy(b:discard(3)); -- consume "foo" | |
76 assert.equals("bar", b:sub(1, 3)); | |
77 end); | |
78 | |
79 it("supports optional end parameter", function () | |
80 local b = dbuffer.new(); | |
81 assert.truthy(b:write("hello world")); | |
82 assert.equals("hello world", b:sub(1)); | |
83 assert.equals("world", b:sub(-5)); | |
84 end); | |
85 | |
86 it("is equivalent to string:sub", function () | |
87 local b = dbuffer.new(11); | |
88 assert.truthy(b:write(s)); | |
89 for i = -13, 13 do | |
90 for j = -13, 13 do | |
91 test_sub(b, i, j); | |
92 end | |
93 end | |
94 end); | |
95 end); | |
96 | |
97 describe(":byte", function () | |
98 -- Helper function to compare buffer:byte() with string:byte() | |
99 local s = "hello world" | |
100 local function test_byte(b, x, y) | |
101 local string_result, buffer_result = {s:byte(x, y)}, {b:byte(x, y)}; | |
102 assert.same(string_result, buffer_result, ("buffer:byte(%d, %s) does not match string:byte()"):format(x, y and ("%d"):format(y) or "nil")); | |
103 end | |
104 | |
105 it("is equivalent to string:byte", function () | |
106 local b = dbuffer.new(11); | |
107 assert.truthy(b:write(s)); | |
108 test_byte(b, 1); | |
109 test_byte(b, 3); | |
110 test_byte(b, -1); | |
111 test_byte(b, -3); | |
112 for i = -13, 13 do | |
113 for j = -13, 13 do | |
114 test_byte(b, i, j); | |
115 end | |
116 end | |
117 end); | |
118 | |
119 it("works with characters > 127", function () | |
120 local b = dbuffer.new(); | |
121 b:write(string.char(0, 140)); | |
122 local r = { b:byte(1, 2) }; | |
123 assert.same({ 0, 140 }, r); | |
124 end); | |
125 | |
126 it("works on an empty buffer", function () | |
127 local b = dbuffer.new(); | |
128 assert.equal("", b:sub(1,1)); | |
129 end); | |
130 end); | |
131 end); |