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description: connection establishment if loadBalanced is specified for non-load balanced clusters
schemaVersion: '1.3'
runOnRequirements:
# Don't run on replica sets because the URI used to configure the clients will contain multiple hosts and the
# replicaSet option, which will cause an error when constructing the lbTrueClient entity.
- topologies: [ single, sharded ]
createEntities:
- client:
id: &lbTrueClient lbTrueClient
# Restrict to a single mongos to ensure there are not multiple hosts in the URI, which would conflict with
# loadBalanced=true.
useMultipleMongoses: false
uriOptions:
loadBalanced: true
- database:
id: &lbTrueDatabase lbTrueDatabase
client: *lbTrueClient
databaseName: &lbTrueDatabaseName lbTrueDb
- client:
id: &lbFalseClient lbFalseClient
uriOptions:
loadBalanced: false
- database:
id: &lbFalseDatabase lbFalseDatabase
client: *lbFalseClient
databaseName: &lbFalseDatabaseName lbFalseDb
_yamlAnchors:
runCommandArguments:
- &pingArguments
arguments:
commandName: ping
command: { ping: 1 }
tests:
# These tests assert that drivers behave correctly if loadBalanced=true/false for non-load balanced clusters. Existing
# spec tests should cover the case where loadBalanced is unset.
# If the server is not configured to be behind a load balancer and the URI contains loadBalanced=true, the driver
# should error during the connection handshake because the server's hello response does not contain a serviceId field.
- description: operations against non-load balanced clusters fail if URI contains loadBalanced=true
operations:
- name: runCommand
object: *lbTrueDatabase
<<: *pingArguments
expectError:
errorContains: Driver attempted to initialize in load balancing mode, but the server does not support this mode
- description: operations against non-load balanced clusters succeed if URI contains loadBalanced=false
operations:
- name: runCommand
object: *lbFalseDatabase
<<: *pingArguments
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