Software / code / prosody
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spec/util_hashring_spec.lua @ 13147:e560f7c691ce
util.sqlite3: Don't cache prepared statements for one-off queries
The :execute method is mainly used for one-off queries such as creating
tables and indices. There is no need to cache this prepared statement,
as those queries are only done on startup.
Further, prepared statements can't be reused without being reset, so
this was likely broken anyway.
| author | Kim Alvefur <zash@zash.se> |
|---|---|
| date | Sat, 10 Jun 2023 22:20:26 +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); |
