Software / code / prosody
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spec/util_hashring_spec.lua @ 13525:0f7e7311eebf
util.xtemplate: Use same argument order in filters even without 'args'
This removes the different argument order used between '{x|foo}' and
'{x|foo(y)}' because the differing order was awkward and confusing.
This util does not seem to be widely used so should not be problematic
to change this part. The only known use is in mod_pubsub, which does not
use the filter function feature.
| author | Kim Alvefur <zash@zash.se> |
|---|---|
| date | Wed, 16 Oct 2024 16:15:05 +0200 |
| parent | 12795:87424cbedc55 |
| rev | line source |
|---|---|
| 10007 | 1 local hashring = require "util.hashring"; |
| 2 | |
| 3 describe("util.hashring", function () | |
|
12794
249b01adc54a
util.hashring: tests: don't randomize order - they are written in a sequential style
Matthew Wild <mwild1@gmail.com>
parents:
10007
diff
changeset
|
4 randomize(false); |
| 10007 | 5 |
| 6 local sha256 = require "util.hashes".sha256; | |
| 7 | |
| 8 local ring = hashring.new(128, sha256); | |
| 9 | |
| 10 it("should fail to get a node that does not exist", function () | |
| 11 assert.is_nil(ring:get_node("foo")) | |
| 12 end); | |
| 13 | |
| 14 it("should support adding nodes", function () | |
| 15 ring:add_node("node1"); | |
| 16 end); | |
| 17 | |
| 18 it("should return a single node for all keys if only one node exists", function () | |
| 19 for i = 1, 100 do | |
| 20 assert.is_equal("node1", ring:get_node(tostring(i))) | |
| 21 end | |
| 22 end); | |
| 23 | |
| 24 it("should support adding a second node", function () | |
| 25 ring:add_node("node2"); | |
| 26 end); | |
| 27 | |
| 28 it("should fail to remove a non-existent node", function () | |
| 29 assert.is_falsy(ring:remove_node("node3")); | |
| 30 end); | |
| 31 | |
| 32 it("should succeed to remove a node", function () | |
| 33 assert.is_truthy(ring:remove_node("node1")); | |
| 34 end); | |
| 35 | |
| 36 it("should return the only node for all keys", function () | |
| 37 for i = 1, 100 do | |
| 38 assert.is_equal("node2", ring:get_node(tostring(i))) | |
| 39 end | |
| 40 end); | |
| 41 | |
| 42 it("should support adding multiple nodes", function () | |
| 43 ring:add_nodes({ "node1", "node3", "node4", "node5" }); | |
| 44 end); | |
| 45 | |
| 46 it("should disrupt a minimal number of keys on node removal", function () | |
| 47 local orig_ring = ring:clone(); | |
| 48 local node_tallies = {}; | |
| 49 | |
| 50 local n = 1000; | |
| 51 | |
| 52 for i = 1, n do | |
| 53 local key = tostring(i); | |
| 54 local node = ring:get_node(key); | |
| 55 node_tallies[node] = (node_tallies[node] or 0) + 1; | |
| 56 end | |
| 57 | |
| 58 --[[ | |
| 59 for node, key_count in pairs(node_tallies) do | |
| 60 print(node, key_count, ("%.2f%%"):format((key_count/n)*100)); | |
| 61 end | |
| 62 ]] | |
| 63 | |
| 64 ring:remove_node("node5"); | |
| 65 | |
| 66 local disrupted_keys = 0; | |
| 67 for i = 1, n do | |
| 68 local key = tostring(i); | |
| 69 if orig_ring:get_node(key) ~= ring:get_node(key) then | |
| 70 disrupted_keys = disrupted_keys + 1; | |
| 71 end | |
| 72 end | |
| 73 assert.is_equal(node_tallies["node5"], disrupted_keys); | |
| 74 end); | |
| 75 | |
| 76 it("should support removing multiple nodes", function () | |
| 77 ring:remove_nodes({"node2", "node3", "node4", "node5"}); | |
| 78 end); | |
| 79 | |
| 80 it("should return a single node for all keys if only one node remains", function () | |
| 81 for i = 1, 100 do | |
| 82 assert.is_equal("node1", ring:get_node(tostring(i))) | |
| 83 end | |
| 84 end); | |
| 85 | |
|
12795
87424cbedc55
util.hashring: Support associating arbitrary data with nodes
Matthew Wild <mwild1@gmail.com>
parents:
12794
diff
changeset
|
86 it("should support values associated with nodes", function () |
|
87424cbedc55
util.hashring: Support associating arbitrary data with nodes
Matthew Wild <mwild1@gmail.com>
parents:
12794
diff
changeset
|
87 local r = hashring.new(128, sha256); |
|
87424cbedc55
util.hashring: Support associating arbitrary data with nodes
Matthew Wild <mwild1@gmail.com>
parents:
12794
diff
changeset
|
88 r:add_node("node1", { a = 1 }); |
|
87424cbedc55
util.hashring: Support associating arbitrary data with nodes
Matthew Wild <mwild1@gmail.com>
parents:
12794
diff
changeset
|
89 local node, value = r:get_node("foo"); |
|
87424cbedc55
util.hashring: Support associating arbitrary data with nodes
Matthew Wild <mwild1@gmail.com>
parents:
12794
diff
changeset
|
90 assert.is_equal("node1", node); |
|
87424cbedc55
util.hashring: Support associating arbitrary data with nodes
Matthew Wild <mwild1@gmail.com>
parents:
12794
diff
changeset
|
91 assert.same({ a = 1 }, value); |
|
87424cbedc55
util.hashring: Support associating arbitrary data with nodes
Matthew Wild <mwild1@gmail.com>
parents:
12794
diff
changeset
|
92 end); |
| 10007 | 93 end); |
