{
  "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"
          }
        }
      ]
    }
  ]
}
