mongodb 0.9.1

The official MongoDB driver for Rust (currently in alpha)
Documentation 
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use bson::{bson, doc};

use super::RunCommand;
use crate::{
    cmap::{CommandResponse, StreamDescription},
    operation::Operation,
};

#[test]
fn build() {
    let op = RunCommand::new("foo".into(), doc! { "isMaster": 1 }, None);
    assert!(op.selection_criteria().is_none());

    let command = op.build(&StreamDescription::new_testing()).unwrap();

    assert_eq!(command.name, "isMaster");
    assert_eq!(command.target_db, "foo");
    assert!(command.read_pref.is_none());
    assert_eq!(
        command
            .body
            .get("isMaster")
            .and_then(crate::bson_util::get_int),
        Some(1)
    );
}

#[test]
fn no_error_ok_0() {
    let op = RunCommand::new("foo".into(), doc! { "isMaster": 1 }, None);
    assert!(op.selection_criteria().is_none());

    let command_response = CommandResponse::with_document(doc! {
        "ok": 0
    });

    assert_eq!(
        op.handle_response(command_response).ok(),
        Some(doc! { "ok": 0 })
    );
}