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comparison spec/util_ringbuffer_spec.lua @ 10901:5e33926f4b43

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util.ringbuffer: Add :sub() and :byte() methods equivalent to the string methods
author Matthew Wild <mwild1@gmail.com>
date Thu, 04 Jun 2020 15:19:20 +0100
parents 8048255ae61e
children 8b5b35baf370
comparison
equal deleted inserted replaced
10900:9e6d979dd603 10901:5e33926f4b43
22 local b = rb.new(); 22 local b = rb.new();
23 it("works", function () 23 it("works", function ()
24 assert.truthy(b:write("hi")); 24 assert.truthy(b:write("hi"));
25 end); 25 end);
26 end); 26 end);
27 describe(":sub", function ()
28 -- Helper function to compare buffer:sub() with string:sub()
29 local function test_sub(b, x, y)
30 local s = b:read(#b, true);
31 local string_result, buffer_result = s:sub(x, y), b:sub(x, y);
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"));
33 end
34
35 it("works", function ()
36 local b = rb.new();
37 b:write("hello world");
38 assert.equals("hello", b:sub(1, 5));
39 end);
40
41 it("supports optional end parameter", function ()
42 local b = rb.new();
43 b:write("hello world");
44 assert.equals("hello world", b:sub(1));
45 assert.equals("world", b:sub(-5));
46 end);
47
48 it("is equivalent to string:sub", function ()
49 local b = rb.new(6);
50 b:write("foobar");
51 b:read(3);
52 b:write("foo");
53 for i = -13, 13 do
54 for j = -13, 13 do
55 test_sub(b, i, j);
56 end
57 end
58 end);
59 end);
60
61 describe(":byte", function ()
62 -- Helper function to compare buffer:byte() with string:byte()
63 local function test_byte(b, x, y)
64 local s = b:read(#b, true);
65 local string_result, buffer_result = {s:byte(x, y)}, {b:byte(x, y)};
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"));
67 end
68
69 it("is equivalent to string:byte", function ()
70 local b = rb.new(6);
71 b:write("foobar");
72 b:read(3);
73 b:write("foo");
74 test_byte(b, 1);
75 test_byte(b, 3);
76 test_byte(b, -1);
77 test_byte(b, -3);
78 for i = -13, 13 do
79 for j = -13, 13 do
80 test_byte(b, i, j);
81 end
82 end
83 end);
84 end);
27 end); 85 end);