{
"description": "snapshot-sessions",
"schemaVersion": "1.0",
"runOnRequirements": [
{
"minServerVersion": "5.0",
"topologies": [
"replicaset",
"sharded-replicaset"
]
}
],
"createEntities": [
{
"client": {
"id": "client0",
"observeEvents": [
"commandStartedEvent"
],
"ignoreCommandMonitoringEvents": [
"findAndModify",
"insert",
"update"
]
}
},
{
"database": {
"id": "database0",
"client": "client0",
"databaseName": "database0"
}
},
{
"collection": {
"id": "collection0",
"database": "database0",
"collectionName": "collection0",
"collectionOptions": {
"writeConcern": {
"w": "majority"
}
}
}
},
{
"session": {
"id": "session0",
"client": "client0",
"sessionOptions": {
"snapshot": true
}
}
},
{
"session": {
"id": "session1",
"client": "client0",
"sessionOptions": {
"snapshot": true
}
}
}
],
"initialData": [
{
"collectionName": "collection0",
"databaseName": "database0",
"documents": [
{
"_id": 1,
"x": 11
},
{
"_id": 2,
"x": 11
}
]
}
],
"tests": [
{
"description": "Find operation with snapshot",
"operations": [
{
"name": "find",
"object": "collection0",
"arguments": {
"session": "session0",
"filter": {
"_id": 1
}
},
"expectResult": [
{
"_id": 1,
"x": 11
}
]
},
{
"name": "findOneAndUpdate",
"object": "collection0",
"arguments": {
"filter": {
"_id": 1
},
"update": {
"$inc": {
"x": 1
}
},
"returnDocument": "After"
},
"expectResult": {
"_id": 1,
"x": 12
}
},
{
"name": "find",
"object": "collection0",
"arguments": {
"session": "session1",
"filter": {
"_id": 1
}
},
"expectResult": [
{
"_id": 1,
"x": 12
}
]
},
{
"name": "findOneAndUpdate",
"object": "collection0",
"arguments": {
"filter": {
"_id": 1
},
"update": {
"$inc": {
"x": 1
}
},
"returnDocument": "After"
},
"expectResult": {
"_id": 1,
"x": 13
}
},
{
"name": "find",
"object": "collection0",
"arguments": {
"filter": {
"_id": 1
}
},
"expectResult": [
{
"_id": 1,
"x": 13
}
]
},
{
"name": "find",
"object": "collection0",
"arguments": {
"session": "session0",
"filter": {
"_id": 1
}
},
"expectResult": [
{
"_id": 1,
"x": 11
}
]
},
{
"name": "find",
"object": "collection0",
"arguments": {
"session": "session1",
"filter": {
"_id": 1
}
},
"expectResult": [
{
"_id": 1,
"x": 12
}
]
}
],
"expectEvents": [
{
"client": "client0",
"events": [
{
"commandStartedEvent": {
"command": {
"find": "collection0",
"readConcern": {
"level": "snapshot",
"atClusterTime": {
"$$exists": false
}
}
}
}
},
{
"commandStartedEvent": {
"command": {
"find": "collection0",
"readConcern": {
"level": "snapshot",
"atClusterTime": {
"$$exists": false
}
}
}
}
},
{
"commandStartedEvent": {
"command": {
"find": "collection0",
"readConcern": {
"$$exists": false
}
}
}
},
{
"commandStartedEvent": {
"command": {
"find": "collection0",
"readConcern": {
"level": "snapshot",
"atClusterTime": {
"$$exists": true
}
}
}
}
},
{
"commandStartedEvent": {
"command": {
"find": "collection0",
"readConcern": {
"level": "snapshot",
"atClusterTime": {
"$$exists": true
}
}
}
}
}
]
}
]
},
{
"description": "Distinct operation with snapshot",
"operations": [
{
"name": "distinct",
"object": "collection0",
"arguments": {
"fieldName": "x",
"filter": {},
"session": "session0"
},
"expectResult": [
11
]
},
{
"name": "findOneAndUpdate",
"object": "collection0",
"arguments": {
"filter": {
"_id": 2
},
"update": {
"$inc": {
"x": 1
}
},
"returnDocument": "After"
},
"expectResult": {
"_id": 2,
"x": 12
}
},
{
"name": "distinct",
"object": "collection0",
"arguments": {
"fieldName": "x",
"filter": {},
"session": "session1"
},
"expectResult": [
11,
12
]
},
{
"name": "findOneAndUpdate",
"object": "collection0",
"arguments": {
"filter": {
"_id": 2
},
"update": {
"$inc": {
"x": 1
}
},
"returnDocument": "After"
},
"expectResult": {
"_id": 2,
"x": 13
}
},
{
"name": "distinct",
"object": "collection0",
"arguments": {
"fieldName": "x",
"filter": {}
},
"expectResult": [
11,
13
]
},
{
"name": "distinct",
"object": "collection0",
"arguments": {
"fieldName": "x",
"filter": {},
"session": "session0"
},
"expectResult": [
11
]
},
{
"name": "distinct",
"object": "collection0",
"arguments": {
"fieldName": "x",
"filter": {},
"session": "session1"
},
"expectResult": [
11,
12
]
}
],
"expectEvents": [
{
"client": "client0",
"events": [
{
"commandStartedEvent": {
"command": {
"distinct": "collection0",
"readConcern": {
"level": "snapshot",
"atClusterTime": {
"$$exists": false
}
}
}
}
},
{
"commandStartedEvent": {
"command": {
"distinct": "collection0",
"readConcern": {
"level": "snapshot",
"atClusterTime": {
"$$exists": false
}
}
}
}
},
{
"commandStartedEvent": {
"command": {
"distinct": "collection0",
"readConcern": {
"$$exists": false
}
}
}
},
{
"commandStartedEvent": {
"command": {
"distinct": "collection0",
"readConcern": {
"level": "snapshot",
"atClusterTime": {
"$$exists": true
}
}
}
}
},
{
"commandStartedEvent": {
"command": {
"distinct": "collection0",
"readConcern": {
"level": "snapshot",
"atClusterTime": {
"$$exists": true
}
}
}
}
}
]
}
]
},
{
"description": "Aggregate operation with snapshot",
"operations": [
{
"name": "aggregate",
"object": "collection0",
"arguments": {
"pipeline": [
{
"$match": {
"_id": 1
}
}
],
"session": "session0"
},
"expectResult": [
{
"_id": 1,
"x": 11
}
]
},
{
"name": "findOneAndUpdate",
"object": "collection0",
"arguments": {
"filter": {
"_id": 1
},
"update": {
"$inc": {
"x": 1
}
},
"returnDocument": "After"
},
"expectResult": {
"_id": 1,
"x": 12
}
},
{
"name": "aggregate",
"object": "collection0",
"arguments": {
"pipeline": [
{
"$match": {
"_id": 1
}
}
],
"session": "session1"
},
"expectResult": [
{
"_id": 1,
"x": 12
}
]
},
{
"name": "findOneAndUpdate",
"object": "collection0",
"arguments": {
"filter": {
"_id": 1
},
"update": {
"$inc": {
"x": 1
}
},
"returnDocument": "After"
},
"expectResult": {
"_id": 1,
"x": 13
}
},
{
"name": "aggregate",
"object": "collection0",
"arguments": {
"pipeline": [
{
"$match": {
"_id": 1
}
}
]
},
"expectResult": [
{
"_id": 1,
"x": 13
}
]
},
{
"name": "aggregate",
"object": "collection0",
"arguments": {
"pipeline": [
{
"$match": {
"_id": 1
}
}
],
"session": "session0"
},
"expectResult": [
{
"_id": 1,
"x": 11
}
]
},
{
"name": "aggregate",
"object": "collection0",
"arguments": {
"pipeline": [
{
"$match": {
"_id": 1
}
}
],
"session": "session1"
},
"expectResult": [
{
"_id": 1,
"x": 12
}
]
}
],
"expectEvents": [
{
"client": "client0",
"events": [
{
"commandStartedEvent": {
"command": {
"aggregate": "collection0",
"readConcern": {
"level": "snapshot",
"atClusterTime": {
"$$exists": false
}
}
}
}
},
{
"commandStartedEvent": {
"command": {
"aggregate": "collection0",
"readConcern": {
"level": "snapshot",
"atClusterTime": {
"$$exists": false
}
}
}
}
},
{
"commandStartedEvent": {
"command": {
"aggregate": "collection0",
"readConcern": {
"$$exists": false
}
}
}
},
{
"commandStartedEvent": {
"command": {
"aggregate": "collection0",
"readConcern": {
"level": "snapshot",
"atClusterTime": {
"$$exists": true
}
}
}
}
},
{
"commandStartedEvent": {
"command": {
"aggregate": "collection0",
"readConcern": {
"level": "snapshot",
"atClusterTime": {
"$$exists": true
}
}
}
}
}
]
}
]
},
{
"description": "countDocuments operation with snapshot",
"operations": [
{
"name": "countDocuments",
"object": "collection0",
"arguments": {
"filter": {},
"session": "session0"
},
"expectResult": 2
},
{
"name": "countDocuments",
"object": "collection0",
"arguments": {
"filter": {},
"session": "session0"
},
"expectResult": 2
}
],
"expectEvents": [
{
"client": "client0",
"events": [
{
"commandStartedEvent": {
"command": {
"aggregate": "collection0",
"readConcern": {
"level": "snapshot",
"atClusterTime": {
"$$exists": false
}
}
}
}
},
{
"commandStartedEvent": {
"command": {
"aggregate": "collection0",
"readConcern": {
"level": "snapshot",
"atClusterTime": {
"$$exists": true
}
}
}
}
}
]
}
]
},
{
"description": "Mixed operation with snapshot",
"operations": [
{
"name": "find",
"object": "collection0",
"arguments": {
"session": "session0",
"filter": {
"_id": 1
}
},
"expectResult": [
{
"_id": 1,
"x": 11
}
]
},
{
"name": "findOneAndUpdate",
"object": "collection0",
"arguments": {
"filter": {
"_id": 1
},
"update": {
"$inc": {
"x": 1
}
},
"returnDocument": "After"
},
"expectResult": {
"_id": 1,
"x": 12
}
},
{
"name": "find",
"object": "collection0",
"arguments": {
"filter": {
"_id": 1
}
},
"expectResult": [
{
"_id": 1,
"x": 12
}
]
},
{
"name": "aggregate",
"object": "collection0",
"arguments": {
"pipeline": [
{
"$match": {
"_id": 1
}
}
],
"session": "session0"
},
"expectResult": [
{
"_id": 1,
"x": 11
}
]
},
{
"name": "distinct",
"object": "collection0",
"arguments": {
"fieldName": "x",
"filter": {},
"session": "session0"
},
"expectResult": [
11
]
}
],
"expectEvents": [
{
"client": "client0",
"events": [
{
"commandStartedEvent": {
"command": {
"find": "collection0",
"readConcern": {
"level": "snapshot",
"atClusterTime": {
"$$exists": false
}
}
}
}
},
{
"commandStartedEvent": {
"command": {
"find": "collection0",
"readConcern": {
"$$exists": false
}
}
}
},
{
"commandStartedEvent": {
"command": {
"aggregate": "collection0",
"readConcern": {
"level": "snapshot",
"atClusterTime": {
"$$exists": true
}
}
}
}
},
{
"commandStartedEvent": {
"command": {
"distinct": "collection0",
"readConcern": {
"level": "snapshot",
"atClusterTime": {
"$$exists": true
}
}
}
}
}
]
}
]
},
{
"description": "Write commands with snapshot session do not affect snapshot reads",
"operations": [
{
"name": "find",
"object": "collection0",
"arguments": {
"filter": {},
"session": "session0"
}
},
{
"name": "insertOne",
"object": "collection0",
"arguments": {
"document": {
"_id": 22,
"x": 33
}
}
},
{
"name": "updateOne",
"object": "collection0",
"arguments": {
"filter": {
"_id": 1
},
"update": {
"$inc": {
"x": 1
}
}
}
},
{
"name": "find",
"object": "collection0",
"arguments": {
"filter": {
"_id": 1
},
"session": "session0"
},
"expectResult": [
{
"_id": 1,
"x": 11
}
]
}
],
"expectEvents": [
{
"client": "client0",
"events": [
{
"commandStartedEvent": {
"command": {
"find": "collection0",
"readConcern": {
"level": "snapshot",
"atClusterTime": {
"$$exists": false
}
}
}
}
},
{
"commandStartedEvent": {
"command": {
"find": "collection0",
"readConcern": {
"level": "snapshot",
"atClusterTime": {
"$$exists": true
}
}
}
}
}
]
}
]
},
{
"description": "First snapshot read does not send atClusterTime",
"operations": [
{
"name": "find",
"object": "collection0",
"arguments": {
"filter": {},
"session": "session0"
}
}
],
"expectEvents": [
{
"client": "client0",
"events": [
{
"commandStartedEvent": {
"command": {
"find": "collection0",
"readConcern": {
"level": "snapshot",
"atClusterTime": {
"$$exists": false
}
}
},
"commandName": "find",
"databaseName": "database0"
}
}
]
}
]
},
{
"description": "StartTransaction fails in snapshot session",
"operations": [
{
"name": "startTransaction",
"object": "session0",
"expectError": {
"isError": true,
"isClientError": true,
"errorContains": "Transactions are not supported in snapshot sessions"
}
}
]
}
]
}