prosody
88cab98aa28c
spec/util_iterators_spec.lua

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spec/util_iterators_spec.lua @ 13535:88cab98aa28c

mod_pubsub: Move precondition error wrangling out of util.pubsub Removes dependency on util.error from util.pubsub which was only used for this one special case. Line count reduction! Would be even nicer if templating could be done by util.error itself.
author Kim Alvefur <zash@zash.se>
date Tue, 29 Oct 2024 14:56:02 +0100
parent 12744:e894677359e5
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1 local iter = require "util.iterators";
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2
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3 describe("util.iterators", function ()
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4 describe("join", function ()
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5 it("should produce a joined iterator", function ()
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6 local expect = { "a", "b", "c", 1, 2, 3 };
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7 local output = {};
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8 for x in iter.join(iter.values({"a", "b", "c"})):append(iter.values({1, 2, 3})) do
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9 table.insert(output, x);
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10 end
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11 assert.same(output, expect);
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12 end);
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13 it("should work with only a single iterator", function ()
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14 local expect = { "a", "b", "c" };
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15 local output = {};
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16 for x in iter.join(iter.values({"a", "b", "c"})) do
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17 table.insert(output, x);
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18 end
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19 assert.same(output, expect);
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20 end);
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21 end);
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22
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23 describe("sorted_pairs", function ()
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24 it("should produce sorted pairs", function ()
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25 local orig = { b = 1, c = 2, a = "foo", d = false };
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26 local n, last_key = 0, nil;
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27 for k, v in iter.sorted_pairs(orig) do
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28 n = n + 1;
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29 if last_key then
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30 assert(k > last_key, "Expected "..k.." > "..last_key)
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31 end
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32 assert.equal(orig[k], v);
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33 last_key = k;
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34 end
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35 assert.equal("d", last_key);
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36 assert.equal(4, n);
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37 end);
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38
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39 it("should allow a custom sort function", function ()
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40 local orig = { b = 1, c = 2, a = "foo", d = false };
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41 local n, last_key = 0, nil;
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42 for k, v in iter.sorted_pairs(orig, function (a, b) return a > b end) do
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43 n = n + 1;
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44 if last_key then
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45 assert(k < last_key, "Expected "..k.." > "..last_key)
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46 end
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47 assert.equal(orig[k], v);
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48 last_key = k;
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49 end
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50 assert.equal("a", last_key);
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51 assert.equal(4, n);
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52 end);
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53 end);
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54 end);