prosody
f6f1dec164b5
spec/util_iterators_spec.lua

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spec/util_iterators_spec.lua @ 9327:f6f1dec164b5

util.iterators: Add sorted_pairs() method
author Matthew Wild <mwild1@gmail.com>
date Fri, 21 Sep 2018 14:27:46 +0100
parent 8805:82d68951ec2a
child 9328:a9592107021b
comparison
equal deleted inserted replaced
9326:c9c4b8bc53b1 9327:f6f1dec164b5
9 table.insert(output, x); 9 table.insert(output, x);
10 end 10 end
11 assert.same(output, expect); 11 assert.same(output, expect);
12 end); 12 end);
13 end); 13 end);
14
15 describe("sorted_pairs", function ()
16 it("should produce sorted pairs", function ()
17 local orig = { b = 1, c = 2, a = "foo", d = false };
18 local n, last_key = 0, nil;
19 for k, v in iter.sorted_pairs(orig) do
20 n = n + 1;
21 if last_key then
22 assert(k > last_key, "Expected "..k.." > "..last_key)
23 end
24 last_key = k;
25 end
26 assert.equal("d", last_key);
27 assert.equal(4, n);
28 end);
29
30 it("should allow a custom sort function", function ()
31 local orig = { b = 1, c = 2, a = "foo", d = false };
32 local n, last_key = 0, nil;
33 for k, v in iter.sorted_pairs(orig, function (a, b) return a > b end) do
34 n = n + 1;
35 if last_key then
36 assert(k < last_key, "Expected "..k.." > "..last_key)
37 end
38 last_key = k;
39 end
40 assert.equal("a", last_key);
41 assert.equal(4, n);
42 end);
43 end);
14 end); 44 end);