{
  "runOn": [
    {
      "minServerVersion": "4.0",
      "topology": [
        "replicaset"
      ]
    },
    {
      "minServerVersion": "4.1.8",
      "topology": [
        "sharded"
      ]
    }
  ],
  "database_name": "transaction-tests",
  "collection_name": "test",
  "data": [],
  "tests": [
    {
      "description": "no transaction options set",
      "operations": [
        {
          "name": "startTransaction",
          "object": "session0"
        },
        {
          "name": "insertOne",
          "object": "collection",
          "arguments": {
            "session": "session0",
            "document": {
              "_id": 1
            }
          },
          "result": {
            "insertedId": 1
          }
        },
        {
          "name": "commitTransaction",
          "object": "session0"
        },
        {
          "name": "startTransaction",
          "object": "session0"
        },
        {
          "name": "insertOne",
          "object": "collection",
          "arguments": {
            "session": "session0",
            "document": {
              "_id": 2
            }
          },
          "result": {
            "insertedId": 2
          }
        },
        {
          "name": "abortTransaction",
          "object": "session0"
        }
      ],
      "expectations": [
        {
          "command_started_event": {
            "command": {
              "insert": "test",
              "documents": [
                {
                  "_id": 1
                }
              ],
              "ordered": true,
              "lsid": "session0",
              "txnNumber": {
                "$numberLong": "1"
              },
              "startTransaction": true,
              "autocommit": false,
              "readConcern": null,
              "writeConcern": null,
              "maxTimeMS": null
            },
            "command_name": "insert",
            "database_name": "transaction-tests"
          }
        },
        {
          "command_started_event": {
            "command": {
              "commitTransaction": 1,
              "lsid": "session0",
              "txnNumber": {
                "$numberLong": "1"
              },
              "startTransaction": null,
              "autocommit": false,
              "readConcern": null,
              "writeConcern": null,
              "maxTimeMS": null
            },
            "command_name": "commitTransaction",
            "database_name": "admin"
          }
        },
        {
          "command_started_event": {
            "command": {
              "insert": "test",
              "documents": [
                {
                  "_id": 2
                }
              ],
              "ordered": true,
              "lsid": "session0",
              "txnNumber": {
                "$numberLong": "2"
              },
              "startTransaction": true,
              "autocommit": false,
              "readConcern": {
                "afterClusterTime": 42
              },
              "writeConcern": null,
              "maxTimeMS": null
            },
            "command_name": "insert",
            "database_name": "transaction-tests"
          }
        },
        {
          "command_started_event": {
            "command": {
              "abortTransaction": 1,
              "lsid": "session0",
              "txnNumber": {
                "$numberLong": "2"
              },
              "startTransaction": null,
              "autocommit": false,
              "readConcern": null,
              "writeConcern": null,
              "maxTimeMS": null
            },
            "command_name": "abortTransaction",
            "database_name": "admin"
          }
        }
      ],
      "outcome": {
        "collection": {
          "data": [
            {
              "_id": 1
            }
          ]
        }
      }
    },
    {
      "description": "transaction options inherited from client",
      "clientOptions": {
        "w": 1,
        "readConcernLevel": "local"
      },
      "operations": [
        {
          "name": "startTransaction",
          "object": "session0"
        },
        {
          "name": "insertOne",
          "object": "collection",
          "arguments": {
            "session": "session0",
            "document": {
              "_id": 1
            }
          },
          "result": {
            "insertedId": 1
          }
        },
        {
          "name": "commitTransaction",
          "object": "session0"
        },
        {
          "name": "startTransaction",
          "object": "session0"
        },
        {
          "name": "insertOne",
          "object": "collection",
          "arguments": {
            "session": "session0",
            "document": {
              "_id": 2
            }
          },
          "result": {
            "insertedId": 2
          }
        },
        {
          "name": "abortTransaction",
          "object": "session0"
        }
      ],
      "expectations": [
        {
          "command_started_event": {
            "command": {
              "insert": "test",
              "documents": [
                {
                  "_id": 1
                }
              ],
              "ordered": true,
              "lsid": "session0",
              "txnNumber": {
                "$numberLong": "1"
              },
              "startTransaction": true,
              "autocommit": false,
              "readConcern": {
                "level": "local"
              },
              "writeConcern": null,
              "maxTimeMS": null
            },
            "command_name": "insert",
            "database_name": "transaction-tests"
          }
        },
        {
          "command_started_event": {
            "command": {
              "commitTransaction": 1,
              "lsid": "session0",
              "txnNumber": {
                "$numberLong": "1"
              },
              "startTransaction": null,
              "autocommit": false,
              "readConcern": null,
              "writeConcern": {
                "w": 1
              },
              "maxTimeMS": null
            },
            "command_name": "commitTransaction",
            "database_name": "admin"
          }
        },
        {
          "command_started_event": {
            "command": {
              "insert": "test",
              "documents": [
                {
                  "_id": 2
                }
              ],
              "ordered": true,
              "lsid": "session0",
              "txnNumber": {
                "$numberLong": "2"
              },
              "startTransaction": true,
              "autocommit": false,
              "readConcern": {
                "level": "local",
                "afterClusterTime": 42
              },
              "writeConcern": null,
              "maxTimeMS": null
            },
            "command_name": "insert",
            "database_name": "transaction-tests"
          }
        },
        {
          "command_started_event": {
            "command": {
              "abortTransaction": 1,
              "lsid": "session0",
              "txnNumber": {
                "$numberLong": "2"
              },
              "startTransaction": null,
              "autocommit": false,
              "readConcern": null,
              "writeConcern": {
                "w": 1
              },
              "maxTimeMS": null
            },
            "command_name": "abortTransaction",
            "database_name": "admin"
          }
        }
      ],
      "outcome": {
        "collection": {
          "data": [
            {
              "_id": 1
            }
          ]
        }
      }
    },
    {
      "description": "transaction options inherited from defaultTransactionOptions",
      "sessionOptions": {
        "session0": {
          "defaultTransactionOptions": {
            "readConcern": {
              "level": "snapshot"
            },
            "writeConcern": {
              "w": 1
            },
            "maxCommitTimeMS": 60000
          }
        }
      },
      "operations": [
        {
          "name": "startTransaction",
          "object": "session0"
        },
        {
          "name": "insertOne",
          "object": "collection",
          "arguments": {
            "session": "session0",
            "document": {
              "_id": 1
            }
          },
          "result": {
            "insertedId": 1
          }
        },
        {
          "name": "commitTransaction",
          "object": "session0"
        },
        {
          "name": "startTransaction",
          "object": "session0"
        },
        {
          "name": "insertOne",
          "object": "collection",
          "arguments": {
            "session": "session0",
            "document": {
              "_id": 2
            }
          },
          "result": {
            "insertedId": 2
          }
        },
        {
          "name": "abortTransaction",
          "object": "session0"
        }
      ],
      "expectations": [
        {
          "command_started_event": {
            "command": {
              "insert": "test",
              "documents": [
                {
                  "_id": 1
                }
              ],
              "ordered": true,
              "lsid": "session0",
              "txnNumber": {
                "$numberLong": "1"
              },
              "startTransaction": true,
              "autocommit": false,
              "readConcern": {
                "level": "snapshot"
              },
              "writeConcern": null
            },
            "command_name": "insert",
            "database_name": "transaction-tests"
          }
        },
        {
          "command_started_event": {
            "command": {
              "commitTransaction": 1,
              "lsid": "session0",
              "txnNumber": {
                "$numberLong": "1"
              },
              "startTransaction": null,
              "autocommit": false,
              "readConcern": null,
              "writeConcern": {
                "w": 1
              },
              "maxTimeMS": 60000
            },
            "command_name": "commitTransaction",
            "database_name": "admin"
          }
        },
        {
          "command_started_event": {
            "command": {
              "insert": "test",
              "documents": [
                {
                  "_id": 2
                }
              ],
              "ordered": true,
              "lsid": "session0",
              "txnNumber": {
                "$numberLong": "2"
              },
              "startTransaction": true,
              "autocommit": false,
              "readConcern": {
                "level": "snapshot",
                "afterClusterTime": 42
              },
              "writeConcern": null
            },
            "command_name": "insert",
            "database_name": "transaction-tests"
          }
        },
        {
          "command_started_event": {
            "command": {
              "abortTransaction": 1,
              "lsid": "session0",
              "txnNumber": {
                "$numberLong": "2"
              },
              "startTransaction": null,
              "autocommit": false,
              "readConcern": null,
              "writeConcern": {
                "w": 1
              }
            },
            "command_name": "abortTransaction",
            "database_name": "admin"
          }
        }
      ],
      "outcome": {
        "collection": {
          "data": [
            {
              "_id": 1
            }
          ]
        }
      }
    },
    {
      "description": "startTransaction options override defaults",
      "clientOptions": {
        "readConcernLevel": "local",
        "w": 1
      },
      "sessionOptions": {
        "session0": {
          "defaultTransactionOptions": {
            "readConcern": {
              "level": "majority"
            },
            "writeConcern": {
              "w": 1
            },
            "maxCommitTimeMS": 30000
          }
        }
      },
      "operations": [
        {
          "name": "startTransaction",
          "object": "session0",
          "arguments": {
            "options": {
              "readConcern": {
                "level": "snapshot"
              },
              "writeConcern": {
                "w": "majority"
              },
              "maxCommitTimeMS": 60000
            }
          }
        },
        {
          "name": "insertOne",
          "object": "collection",
          "arguments": {
            "session": "session0",
            "document": {
              "_id": 1
            }
          },
          "result": {
            "insertedId": 1
          }
        },
        {
          "name": "commitTransaction",
          "object": "session0"
        },
        {
          "name": "startTransaction",
          "object": "session0",
          "arguments": {
            "options": {
              "readConcern": {
                "level": "snapshot"
              },
              "writeConcern": {
                "w": "majority"
              }
            }
          }
        },
        {
          "name": "insertOne",
          "object": "collection",
          "arguments": {
            "session": "session0",
            "document": {
              "_id": 2
            }
          },
          "result": {
            "insertedId": 2
          }
        },
        {
          "name": "abortTransaction",
          "object": "session0"
        }
      ],
      "expectations": [
        {
          "command_started_event": {
            "command": {
              "insert": "test",
              "documents": [
                {
                  "_id": 1
                }
              ],
              "ordered": true,
              "lsid": "session0",
              "txnNumber": {
                "$numberLong": "1"
              },
              "startTransaction": true,
              "autocommit": false,
              "readConcern": {
                "level": "snapshot"
              },
              "writeConcern": null,
              "maxTimeMS": null
            },
            "command_name": "insert",
            "database_name": "transaction-tests"
          }
        },
        {
          "command_started_event": {
            "command": {
              "commitTransaction": 1,
              "lsid": "session0",
              "txnNumber": {
                "$numberLong": "1"
              },
              "startTransaction": null,
              "autocommit": false,
              "readConcern": null,
              "writeConcern": {
                "w": "majority"
              },
              "maxTimeMS": 60000
            },
            "command_name": "commitTransaction",
            "database_name": "admin"
          }
        },
        {
          "command_started_event": {
            "command": {
              "insert": "test",
              "documents": [
                {
                  "_id": 2
                }
              ],
              "ordered": true,
              "lsid": "session0",
              "txnNumber": {
                "$numberLong": "2"
              },
              "startTransaction": true,
              "autocommit": false,
              "readConcern": {
                "level": "snapshot",
                "afterClusterTime": 42
              },
              "writeConcern": null,
              "maxTimeMS": null
            },
            "command_name": "insert",
            "database_name": "transaction-tests"
          }
        },
        {
          "command_started_event": {
            "command": {
              "abortTransaction": 1,
              "lsid": "session0",
              "txnNumber": {
                "$numberLong": "2"
              },
              "startTransaction": null,
              "autocommit": false,
              "readConcern": null,
              "writeConcern": {
                "w": "majority"
              },
              "maxTimeMS": null
            },
            "command_name": "abortTransaction",
            "database_name": "admin"
          }
        }
      ],
      "outcome": {
        "collection": {
          "data": [
            {
              "_id": 1
            }
          ]
        }
      }
    },
    {
      "description": "defaultTransactionOptions override client options",
      "clientOptions": {
        "readConcernLevel": "local",
        "w": 1
      },
      "sessionOptions": {
        "session0": {
          "defaultTransactionOptions": {
            "readConcern": {
              "level": "snapshot"
            },
            "writeConcern": {
              "w": "majority"
            },
            "maxCommitTimeMS": 60000
          }
        }
      },
      "operations": [
        {
          "name": "startTransaction",
          "object": "session0"
        },
        {
          "name": "insertOne",
          "object": "collection",
          "arguments": {
            "session": "session0",
            "document": {
              "_id": 1
            }
          },
          "result": {
            "insertedId": 1
          }
        },
        {
          "name": "commitTransaction",
          "object": "session0"
        },
        {
          "name": "startTransaction",
          "object": "session0"
        },
        {
          "name": "insertOne",
          "object": "collection",
          "arguments": {
            "session": "session0",
            "document": {
              "_id": 2
            }
          },
          "result": {
            "insertedId": 2
          }
        },
        {
          "name": "abortTransaction",
          "object": "session0"
        }
      ],
      "expectations": [
        {
          "command_started_event": {
            "command": {
              "insert": "test",
              "documents": [
                {
                  "_id": 1
                }
              ],
              "ordered": true,
              "lsid": "session0",
              "txnNumber": {
                "$numberLong": "1"
              },
              "startTransaction": true,
              "autocommit": false,
              "readConcern": {
                "level": "snapshot"
              },
              "writeConcern": null,
              "maxTimeMS": null
            },
            "command_name": "insert",
            "database_name": "transaction-tests"
          }
        },
        {
          "command_started_event": {
            "command": {
              "commitTransaction": 1,
              "lsid": "session0",
              "txnNumber": {
                "$numberLong": "1"
              },
              "startTransaction": null,
              "autocommit": false,
              "readConcern": null,
              "writeConcern": {
                "w": "majority"
              },
              "maxTimeMS": 60000
            },
            "command_name": "commitTransaction",
            "database_name": "admin"
          }
        },
        {
          "command_started_event": {
            "command": {
              "insert": "test",
              "documents": [
                {
                  "_id": 2
                }
              ],
              "ordered": true,
              "lsid": "session0",
              "txnNumber": {
                "$numberLong": "2"
              },
              "startTransaction": true,
              "autocommit": false,
              "readConcern": {
                "level": "snapshot",
                "afterClusterTime": 42
              },
              "writeConcern": null,
              "maxTimeMS": null
            },
            "command_name": "insert",
            "database_name": "transaction-tests"
          }
        },
        {
          "command_started_event": {
            "command": {
              "abortTransaction": 1,
              "lsid": "session0",
              "txnNumber": {
                "$numberLong": "2"
              },
              "startTransaction": null,
              "autocommit": false,
              "readConcern": null,
              "writeConcern": {
                "w": "majority"
              },
              "maxTimeMS": null
            },
            "command_name": "abortTransaction",
            "database_name": "admin"
          }
        }
      ],
      "outcome": {
        "collection": {
          "data": [
            {
              "_id": 1
            }
          ]
        }
      }
    },
    {
      "description": "readConcern local in defaultTransactionOptions",
      "clientOptions": {
        "w": 1
      },
      "sessionOptions": {
        "session0": {
          "defaultTransactionOptions": {
            "readConcern": {
              "level": "local"
            }
          }
        }
      },
      "operations": [
        {
          "name": "startTransaction",
          "object": "session0"
        },
        {
          "name": "insertOne",
          "object": "collection",
          "arguments": {
            "session": "session0",
            "document": {
              "_id": 1
            }
          },
          "result": {
            "insertedId": 1
          }
        },
        {
          "name": "commitTransaction",
          "object": "session0"
        },
        {
          "name": "startTransaction",
          "object": "session0"
        },
        {
          "name": "insertOne",
          "object": "collection",
          "arguments": {
            "session": "session0",
            "document": {
              "_id": 2
            }
          },
          "result": {
            "insertedId": 2
          }
        },
        {
          "name": "abortTransaction",
          "object": "session0"
        }
      ],
      "expectations": [
        {
          "command_started_event": {
            "command": {
              "insert": "test",
              "documents": [
                {
                  "_id": 1
                }
              ],
              "ordered": true,
              "lsid": "session0",
              "txnNumber": {
                "$numberLong": "1"
              },
              "startTransaction": true,
              "autocommit": false,
              "readConcern": {
                "level": "local"
              },
              "writeConcern": null
            },
            "command_name": "insert",
            "database_name": "transaction-tests"
          }
        },
        {
          "command_started_event": {
            "command": {
              "commitTransaction": 1,
              "lsid": "session0",
              "txnNumber": {
                "$numberLong": "1"
              },
              "startTransaction": null,
              "autocommit": false,
              "readConcern": null,
              "writeConcern": {
                "w": 1
              }
            },
            "command_name": "commitTransaction",
            "database_name": "admin"
          }
        },
        {
          "command_started_event": {
            "command": {
              "insert": "test",
              "documents": [
                {
                  "_id": 2
                }
              ],
              "ordered": true,
              "lsid": "session0",
              "txnNumber": {
                "$numberLong": "2"
              },
              "startTransaction": true,
              "autocommit": false,
              "readConcern": {
                "level": "local",
                "afterClusterTime": 42
              },
              "writeConcern": null
            },
            "command_name": "insert",
            "database_name": "transaction-tests"
          }
        },
        {
          "command_started_event": {
            "command": {
              "abortTransaction": 1,
              "lsid": "session0",
              "txnNumber": {
                "$numberLong": "2"
              },
              "startTransaction": null,
              "autocommit": false,
              "readConcern": null,
              "writeConcern": {
                "w": 1
              }
            },
            "command_name": "abortTransaction",
            "database_name": "admin"
          }
        }
      ],
      "outcome": {
        "collection": {
          "data": [
            {
              "_id": 1
            }
          ]
        }
      }
    },
    {
      "description": "readConcern snapshot in startTransaction options",
      "sessionOptions": {
        "session0": {
          "defaultTransactionOptions": {
            "readConcern": {
              "level": "majority"
            }
          }
        }
      },
      "operations": [
        {
          "name": "startTransaction",
          "object": "session0",
          "arguments": {
            "options": {
              "readConcern": {
                "level": "snapshot"
              }
            }
          }
        },
        {
          "name": "insertOne",
          "object": "collection",
          "arguments": {
            "session": "session0",
            "document": {
              "_id": 1
            }
          },
          "result": {
            "insertedId": 1
          }
        },
        {
          "name": "commitTransaction",
          "object": "session0"
        },
        {
          "name": "startTransaction",
          "object": "session0",
          "arguments": {
            "options": {
              "readConcern": {
                "level": "snapshot"
              }
            }
          }
        },
        {
          "name": "insertOne",
          "object": "collection",
          "arguments": {
            "session": "session0",
            "document": {
              "_id": 2
            }
          },
          "result": {
            "insertedId": 2
          }
        },
        {
          "name": "abortTransaction",
          "object": "session0"
        }
      ],
      "expectations": [
        {
          "command_started_event": {
            "command": {
              "insert": "test",
              "documents": [
                {
                  "_id": 1
                }
              ],
              "ordered": true,
              "lsid": "session0",
              "txnNumber": {
                "$numberLong": "1"
              },
              "startTransaction": true,
              "autocommit": false,
              "readConcern": {
                "level": "snapshot"
              },
              "writeConcern": null
            },
            "command_name": "insert",
            "database_name": "transaction-tests"
          }
        },
        {
          "command_started_event": {
            "command": {
              "commitTransaction": 1,
              "lsid": "session0",
              "txnNumber": {
                "$numberLong": "1"
              },
              "startTransaction": null,
              "autocommit": false,
              "readConcern": null,
              "writeConcern": null
            },
            "command_name": "commitTransaction",
            "database_name": "admin"
          }
        },
        {
          "command_started_event": {
            "command": {
              "insert": "test",
              "documents": [
                {
                  "_id": 2
                }
              ],
              "ordered": true,
              "lsid": "session0",
              "txnNumber": {
                "$numberLong": "2"
              },
              "startTransaction": true,
              "autocommit": false,
              "readConcern": {
                "level": "snapshot",
                "afterClusterTime": 42
              },
              "writeConcern": null
            },
            "command_name": "insert",
            "database_name": "transaction-tests"
          }
        },
        {
          "command_started_event": {
            "command": {
              "abortTransaction": 1,
              "lsid": "session0",
              "txnNumber": {
                "$numberLong": "2"
              },
              "startTransaction": null,
              "autocommit": false,
              "readConcern": null,
              "writeConcern": null
            },
            "command_name": "abortTransaction",
            "database_name": "admin"
          }
        }
      ],
      "outcome": {
        "collection": {
          "data": [
            {
              "_id": 1
            }
          ]
        }
      }
    },
    {
      "description": "client writeConcern ignored for bulk",
      "clientOptions": {
        "w": "majority"
      },
      "operations": [
        {
          "name": "startTransaction",
          "object": "session0",
          "arguments": {
            "options": {
              "writeConcern": {
                "w": 1
              }
            }
          }
        },
        {
          "name": "bulkWrite",
          "object": "collection",
          "arguments": {
            "requests": [
              {
                "name": "insertOne",
                "arguments": {
                  "document": {
                    "_id": 1
                  }
                }
              }
            ],
            "session": "session0"
          },
          "result": {
            "deletedCount": 0,
            "insertedCount": 1,
            "insertedIds": {
              "0": 1
            },
            "matchedCount": 0,
            "modifiedCount": 0,
            "upsertedCount": 0,
            "upsertedIds": {}
          }
        },
        {
          "name": "commitTransaction",
          "object": "session0"
        }
      ],
      "expectations": [
        {
          "command_started_event": {
            "command": {
              "insert": "test",
              "documents": [
                {
                  "_id": 1
                }
              ],
              "ordered": true,
              "readConcern": null,
              "lsid": "session0",
              "txnNumber": {
                "$numberLong": "1"
              },
              "startTransaction": true,
              "autocommit": false,
              "writeConcern": null
            },
            "command_name": "insert",
            "database_name": "transaction-tests"
          }
        },
        {
          "command_started_event": {
            "command": {
              "commitTransaction": 1,
              "lsid": "session0",
              "txnNumber": {
                "$numberLong": "1"
              },
              "startTransaction": null,
              "autocommit": false,
              "writeConcern": {
                "w": 1
              }
            },
            "command_name": "commitTransaction",
            "database_name": "admin"
          }
        }
      ],
      "outcome": {
        "collection": {
          "data": [
            {
              "_id": 1
            }
          ]
        }
      }
    },
    {
      "description": "readPreference inherited from client",
      "clientOptions": {
        "readPreference": "secondary"
      },
      "operations": [
        {
          "name": "startTransaction",
          "object": "session0"
        },
        {
          "name": "insertOne",
          "object": "collection",
          "arguments": {
            "session": "session0",
            "document": {
              "_id": 1
            }
          },
          "result": {
            "insertedId": 1
          }
        },
        {
          "name": "find",
          "object": "collection",
          "arguments": {
            "session": "session0",
            "filter": {
              "_id": 1
            }
          },
          "result": {
            "errorContains": "read preference in a transaction must be primary"
          }
        },
        {
          "name": "commitTransaction",
          "object": "session0"
        }
      ],
      "expectations": [
        {
          "command_started_event": {
            "command": {
              "insert": "test",
              "documents": [
                {
                  "_id": 1
                }
              ],
              "ordered": true,
              "lsid": "session0",
              "txnNumber": {
                "$numberLong": "1"
              },
              "startTransaction": true,
              "autocommit": false,
              "readConcern": null,
              "writeConcern": null
            },
            "command_name": "insert",
            "database_name": "transaction-tests"
          }
        },
        {
          "command_started_event": {
            "command": {
              "commitTransaction": 1,
              "lsid": "session0",
              "txnNumber": {
                "$numberLong": "1"
              },
              "startTransaction": null,
              "autocommit": false,
              "readConcern": null,
              "writeConcern": null
            },
            "command_name": "commitTransaction",
            "database_name": "admin"
          }
        }
      ],
      "outcome": {
        "collection": {
          "data": [
            {
              "_id": 1
            }
          ]
        }
      }
    },
    {
      "description": "readPreference inherited from defaultTransactionOptions",
      "clientOptions": {
        "readPreference": "primary"
      },
      "sessionOptions": {
        "session0": {
          "defaultTransactionOptions": {
            "readPreference": {
              "mode": "Secondary"
            }
          }
        }
      },
      "operations": [
        {
          "name": "startTransaction",
          "object": "session0"
        },
        {
          "name": "insertOne",
          "object": "collection",
          "arguments": {
            "session": "session0",
            "document": {
              "_id": 1
            }
          },
          "result": {
            "insertedId": 1
          }
        },
        {
          "name": "find",
          "object": "collection",
          "arguments": {
            "session": "session0",
            "filter": {
              "_id": 1
            }
          },
          "result": {
            "errorContains": "read preference in a transaction must be primary"
          }
        },
        {
          "name": "commitTransaction",
          "object": "session0"
        }
      ],
      "expectations": [
        {
          "command_started_event": {
            "command": {
              "insert": "test",
              "documents": [
                {
                  "_id": 1
                }
              ],
              "ordered": true,
              "lsid": "session0",
              "txnNumber": {
                "$numberLong": "1"
              },
              "startTransaction": true,
              "autocommit": false,
              "readConcern": null,
              "writeConcern": null
            },
            "command_name": "insert",
            "database_name": "transaction-tests"
          }
        },
        {
          "command_started_event": {
            "command": {
              "commitTransaction": 1,
              "lsid": "session0",
              "txnNumber": {
                "$numberLong": "1"
              },
              "startTransaction": null,
              "autocommit": false,
              "readConcern": null,
              "writeConcern": null
            },
            "command_name": "commitTransaction",
            "database_name": "admin"
          }
        }
      ],
      "outcome": {
        "collection": {
          "data": [
            {
              "_id": 1
            }
          ]
        }
      }
    },
    {
      "description": "startTransaction overrides readPreference",
      "clientOptions": {
        "readPreference": "primary"
      },
      "sessionOptions": {
        "session0": {
          "defaultTransactionOptions": {
            "readPreference": {
              "mode": "Primary"
            }
          }
        }
      },
      "operations": [
        {
          "name": "startTransaction",
          "object": "session0",
          "arguments": {
            "options": {
              "readPreference": {
                "mode": "Secondary"
              }
            }
          }
        },
        {
          "name": "insertOne",
          "object": "collection",
          "arguments": {
            "session": "session0",
            "document": {
              "_id": 1
            }
          },
          "result": {
            "insertedId": 1
          }
        },
        {
          "name": "find",
          "object": "collection",
          "arguments": {
            "session": "session0",
            "filter": {
              "_id": 1
            }
          },
          "result": {
            "errorContains": "read preference in a transaction must be primary"
          }
        },
        {
          "name": "commitTransaction",
          "object": "session0"
        }
      ],
      "expectations": [
        {
          "command_started_event": {
            "command": {
              "insert": "test",
              "documents": [
                {
                  "_id": 1
                }
              ],
              "ordered": true,
              "lsid": "session0",
              "txnNumber": {
                "$numberLong": "1"
              },
              "startTransaction": true,
              "autocommit": false,
              "readConcern": null,
              "writeConcern": null
            },
            "command_name": "insert",
            "database_name": "transaction-tests"
          }
        },
        {
          "command_started_event": {
            "command": {
              "commitTransaction": 1,
              "lsid": "session0",
              "txnNumber": {
                "$numberLong": "1"
              },
              "startTransaction": null,
              "autocommit": false,
              "readConcern": null,
              "writeConcern": null
            },
            "command_name": "commitTransaction",
            "database_name": "admin"
          }
        }
      ],
      "outcome": {
        "collection": {
          "data": [
            {
              "_id": 1
            }
          ]
        }
      }
    }
  ]
}
