1description: server selection for load-balanced clusters
2
3schemaVersion: '1.3'
4
5runOnRequirements:
6 - topologies: [ load-balanced ]
7
8createEntities:
9 - client:
10 id: &client0 client0
11 useMultipleMongoses: true
12 observeEvents:
13 - commandStartedEvent
14 - database:
15 id: &database0 database0
16 client: *client0
17 databaseName: &database0Name database0Name
18 - collection:
19 id: &collection0 collection0
20 database: *database0
21 collectionName: &collection0Name coll0
22 collectionOptions:
23 readPreference:
24 # Use secondaryPreferred to ensure that operations can succeed even if the shards are only comprised of one
25 # server.
26 mode: &readPrefMode secondaryPreferred
27
28initialData:
29 - collectionName: *collection0Name
30 databaseName: *database0Name
31 documents: []
32
33tests:
34 - description: $readPreference is sent for load-balanced clusters
35 operations:
36 - name: find
37 object: *collection0
38 arguments:
39 filter: {}
40 expectEvents:
41 - client: *client0
42 events:
43 - commandStartedEvent:
44 command:
45 find: *collection0Name
46 filter: {}
47 $readPreference:
48 mode: *readPrefMode
49 commandName: find
50 databaseName: *database0Name
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