mongoDB-2.7.1.3: test/QuerySpec.hs
{-# LANGUAGE OverloadedStrings, ExtendedDefaultRules, ScopedTypeVariables #-}
{-# OPTIONS_GHC -fno-warn-type-defaults #-}
module QuerySpec (spec) where
import Data.String (IsString(..))
import TestImport
import Control.Concurrent (threadDelay)
import Control.Exception
import Control.Monad (forM_, when)
import System.Environment (getEnv, lookupEnv)
import System.IO.Error (catchIOError)
import qualified Data.List as L
import qualified Data.Text as T
testDBName :: Database
testDBName = "mongodb-haskell-test"
db :: Action IO a -> IO a
db action = bracket start end inbetween
where
start = lookupEnv "CONNECTION_STRING" >>= getPipe
end (_, pipe) = close pipe
inbetween (testuser, pipe) = do
logged_in <-
access pipe master "admin" $ do
auth (u_name testuser) (u_passwd testuser)
assert logged_in $ pure ()
access pipe master testDBName action
getPipe Nothing = do
let user = TestUser "testadmin" "123"
mongodbHost <- getEnv mongodbHostEnvVariable `catchIOError` (\_ -> return "localhost")
pipe <- connect (host mongodbHost)
pure (user, pipe)
getPipe (Just cs) = do
let creds = extractMongoAtlasCredentials . T.pack $ cs
user = TestUser "testadmin" (atlas_password creds)
pipe <- connectAtlas creds
pure (user, pipe)
getWireVersion :: IO Int
getWireVersion = db $ do
sd <- retrieveServerData
return $ maxWireVersion sd
withCleanDatabase :: ActionWith () -> IO ()
withCleanDatabase action = dropDB >> action () >> dropDB >> return ()
where
dropDB = db $ dropDatabase testDBName
insertDuplicateWith :: (Collection -> [Document] -> Action IO a) -> IO ()
insertDuplicateWith testInsert = do
_id <- db $ insert "team" ["name" =: "Dodgers", "league" =: "American"]
_ <- db $ testInsert "team" [ ["name" =: "Yankees", "league" =: "American"]
-- Try to insert document with duplicate key
, ["name" =: "Dodgers", "league" =: "American", "_id" =: _id]
, ["name" =: "Indians", "league" =: "American"]
]
return ()
insertUsers :: IO ()
insertUsers = db $
insertAll_ "users" [ ["_id" =: "jane", "joined" =: parseDate "2011-03-02", "likes" =: ["golf", "racquetball"]]
, ["_id" =: "joe", "joined" =: parseDate "2012-07-02", "likes" =: ["tennis", "golf", "swimming"]]
, ["_id" =: "jill", "joined" =: parseDate "2013-11-17", "likes" =: ["cricket", "golf"]]
]
pendingIfMongoVersion :: ((Integer, Integer) -> Bool) -> SpecWith () -> Spec
pendingIfMongoVersion invalidVersion = before $ do
version <- db $ extractVersion . T.splitOn "." . at "version" <$> runCommand1 "buildinfo"
when (invalidVersion version) $ pendingWith "This test does not run in the current database version"
where
extractVersion (major:minor:_) = (read $ T.unpack major, read $ T.unpack minor)
extractVersion _ = error "Invalid version specification"
bigDocument :: Document
bigDocument = (flip map) [1..10000] $ \i -> (fromString $ "team" ++ (show i)) =: ("team " ++ (show i) ++ " name")
fineGrainedBigDocument :: Document
fineGrainedBigDocument = (flip map) [1..1000] $ \i -> (fromString $ "team" ++ (show i)) =: ("team " ++ (show i) ++ " name")
hugeDocument :: Document
hugeDocument = (flip map) [1..1000000] $ \i -> (fromString $ "team" ++ (show i)) =: ("team " ++ (show i) ++ " name")
data TestUser = TestUser {u_name :: T.Text, u_passwd :: T.Text}
spec :: Spec
spec = around withCleanDatabase $ do
describe "useDb" $ do
it "changes the db" $ do
let anotherDBName = "another-mongodb-haskell-test"
db thisDatabase `shouldReturn` testDBName
db (useDb anotherDBName thisDatabase) `shouldReturn` anotherDBName
describe "collectionWithDot" $ do
it "uses a collection with dots in the name" $ do
-- Dots in collection names are disallowed from Mongo 6 on
mongo_version <- getEnv "MONGO_VERSION"
when (mongo_version `elem` ["mongo:5.0", "mongo:4.0"]) $ do
let collec = "collection.with.dot"
_id <- db $ insert collec ["name" =: "jack", "color" =: "blue"]
Just doc <- db $ findOne (select ["name" =: "jack"] collec)
doc !? "color" `shouldBe` Just "blue"
describe "insert" $ do
it "inserts a document to the collection and returns its _id" $ do
_id <- db $ insert "team" ["name" =: "Yankees", "league" =: "American"]
result <- db $ rest =<< find (select [] "team")
result `shouldBe` [["_id" =: _id, "name" =: "Yankees", "league" =: "American"]]
describe "insert_" $ do
it "inserts a document to the collection and doesn't return _id" $ do
_id <- db $ insert_ "team" ["name" =: "Yankees", "league" =: "American"]
db (count $ select ["name" =: "Yankees", "league" =: "American"] "team") `shouldReturn` 1
_id `shouldBe` ()
describe "upsert" $ do
it "upserts a document twice with the same spec" $ do
let q = select ["name" =: "jack"] "users"
db $ upsert q ["color" =: "blue", "name" =: "jack"]
-- since there is no way to ask for a ack, we must wait for "a sufficient time"
-- for the write to be visible
threadDelay 10000
db (rest =<< find (select [] "users")) >>= print
db (count $ select ["name" =: "jack"] "users") `shouldReturn` 1
db $ upsert q ["color" =: "red", "name" =: "jack"]
threadDelay 10000
db (count $ select ["name" =: "jack"] "users") `shouldReturn` 1
Just doc <- db $ findOne (select ["name" =: "jack"] "users")
doc !? "color" `shouldBe` Just "red"
describe "insertMany" $ do
it "inserts documents to the collection and returns their _ids" $ do
(_id1:_id2:_) <- db $ insertMany "team" [ ["name" =: "Yankees", "league" =: "American"]
, ["name" =: "Dodgers", "league" =: "American"]
]
result <- db $ rest =<< find (select [] "team")
result `shouldBe` [ ["_id" =: _id1, "name" =: "Yankees", "league" =: "American"]
, ["_id" =: _id2, "name" =: "Dodgers", "league" =: "American"]
]
context "Insert a document with duplicating key" $ do
before (insertDuplicateWith insertMany `catch` \(_ :: Failure) -> return ()) $ do
it "inserts documents before it" $
db (count $ select ["name" =: "Yankees", "league" =: "American"] "team") `shouldReturn` 1
it "doesn't insert documents after it" $
db (count $ select ["name" =: "Indians", "league" =: "American"] "team") `shouldReturn` 0
it "raises exception" $
insertDuplicateWith insertMany `shouldThrow` anyException
-- TODO No way to call getLastError?
describe "insertMany_" $ do
it "inserts documents to the collection and returns nothing" $ do
ids <- db $ insertMany_ "team" [ ["name" =: "Yankees", "league" =: "American"]
, ["name" =: "Dodgers", "league" =: "American"]
]
ids `shouldBe` ()
it "fails if the document is too big" $ do
(db $ insertMany_ "hugeDocCollection" [hugeDocument]) `shouldThrow` anyException
context "Insert a document with duplicating key" $ do
before (insertDuplicateWith insertMany_ `catch` \(_ :: Failure) -> return ()) $ do
it "inserts documents before it" $
db (count $ select ["name" =: "Yankees", "league" =: "American"] "team") `shouldReturn` 1
it "doesn't insert documents after it" $
db (count $ select ["name" =: "Indians", "league" =: "American"] "team") `shouldReturn` 0
it "raises exception" $
insertDuplicateWith insertMany_ `shouldThrow` anyException
describe "insertAll" $ do
it "inserts documents to the collection and returns their _ids" $ do
(_id1:_id2:_) <- db $ insertAll "team" [ ["name" =: "Yankees", "league" =: "American"]
, ["name" =: "Dodgers", "league" =: "American"]
]
result <- db $ rest =<< find (select [] "team")
result `shouldBe` [["_id" =: _id1, "name" =: "Yankees", "league" =: "American"]
,["_id" =: _id2, "name" =: "Dodgers", "league" =: "American"]
]
context "Insert a document with duplicating key" $ do
before (insertDuplicateWith insertAll `catch` \(_ :: Failure) -> return ()) $ do
it "inserts all documents which can be inserted" $ do
db (count $ select ["name" =: "Yankees", "league" =: "American"] "team") `shouldReturn` 1
db (count $ select ["name" =: "Indians", "league" =: "American"] "team") `shouldReturn` 1
it "raises exception" $
insertDuplicateWith insertAll `shouldThrow` anyException
describe "insertAll_" $ do
it "inserts documents to the collection and returns their _ids" $ do
ids <- db $ insertAll_ "team" [ ["name" =: "Yankees", "league" =: "American"]
, ["name" =: "Dodgers", "league" =: "American"]
]
ids `shouldBe` ()
context "Insert a document with duplicating key" $ do
before (insertDuplicateWith insertAll_ `catch` \(_ :: Failure) -> return ()) $ do
it "inserts all documents which can be inserted" $ do
db (count $ select ["name" =: "Yankees", "league" =: "American"] "team") `shouldReturn` 1
db (count $ select ["name" =: "Indians", "league" =: "American"] "team") `shouldReturn` 1
it "raises exception" $
insertDuplicateWith insertAll_ `shouldThrow` anyException
describe "insertAll_" $ do
it "inserts documents and receives 100 000 of them" $ do
let docs = (flip map) [0..200000] $ \i ->
["name" =: (T.pack $ "name " ++ (show i))]
db $ insertAll_ "bigCollection" docs
db $ do
cur <- find $ (select [] "bigCollection") {limit = 100000, batchSize = 100000}
returnedDocs <- rest cur
liftIO $ (length returnedDocs) `shouldBe` 100000
describe "insertAll_" $ do
it "inserts big documents" $ do
let docs = replicate 100 bigDocument
db $ insertAll_ "bigDocCollection" docs
db $ do
cur <- find $ (select [] "bigDocCollection") {limit = 100000, batchSize = 100000}
returnedDocs <- rest cur
liftIO $ (length returnedDocs) `shouldBe` 100
it "inserts fine grained big documents" $ do
let docs = replicate 1000 fineGrainedBigDocument
db $ insertAll_ "bigDocFineGrainedCollection" docs
db $ do
cur <- find $ (select [] "bigDocFineGrainedCollection") {limit = 100000, batchSize = 100000}
returnedDocs <- rest cur
liftIO $ (length returnedDocs) `shouldBe` 1000
it "skips one too big document" $ do
(db $ insertAll_ "hugeDocCollection" [hugeDocument]) `shouldThrow` anyException
db $ do
cur <- find $ (select [] "hugeDocCollection") {limit = 100000, batchSize = 100000}
returnedDocs <- rest cur
liftIO $ (length returnedDocs) `shouldBe` 0
describe "rest" $ do
it "returns all documents from the collection" $ do
let docs = (flip map) [0..6000] $ \i ->
["name" =: (T.pack $ "name " ++ (show i))]
collectionName = "smallCollection"
db $ insertAll_ collectionName docs
db $ do
cur <- find $ (select [] collectionName)
returnedDocs <- rest cur
liftIO $ (length returnedDocs) `shouldBe` 6001
describe "updateMany" $ do
it "updates value" $ do
wireVersion <- getWireVersion
when (wireVersion > 1) $ do
_id <- db $ insert "team" ["name" =: "Yankees", "league" =: "American"]
result <- db $ rest =<< find (select [] "team")
result `shouldBe` [["_id" =: _id, "name" =: "Yankees", "league" =: "American"]]
_ <- db $ updateMany "team" [([ "_id" =: _id]
, ["$set" =: ["league" =: "European"]]
, [])]
updatedResult <- db $ rest =<< find (select [] "team")
updatedResult `shouldBe` [["_id" =: _id, "name" =: "Yankees", "league" =: "European"]]
it "upserts value" $ do
wireVersion <- getWireVersion
when (wireVersion > 1) $ do
c <- db $ count (select [] "team")
c `shouldBe` 0
_ <- db $ updateMany "team" [( []
, ["name" =: "Giants", "league" =: "MLB"]
, [Upsert]
)]
updatedResult <- db $ rest =<< find ((select [] "team") {project = ["_id" =: (0 :: Int)]})
map L.sort updatedResult `shouldBe` [["league" =: "MLB", "name" =: "Giants"]]
it "updates all documents with Multi enabled" $ do
wireVersion <- getWireVersion
when (wireVersion > 1) $ do
_ <- db $ insert "team" ["name" =: "Yankees", "league" =: "American"]
_ <- db $ insert "team" ["name" =: "Yankees", "league" =: "MiLB"]
_ <- db $ updateMany "team" [( ["name" =: "Yankees"]
, ["$set" =: ["league" =: "MLB"]]
, [MultiUpdate]
)]
updatedResult <- db $ rest =<< find ((select [] "team") {project = ["_id" =: (0 :: Int)]})
(L.sort $ map L.sort updatedResult) `shouldBe` [ ["league" =: "MLB", "name" =: "Yankees"]
, ["league" =: "MLB", "name" =: "Yankees"]
]
it "updates one document when there is no Multi option" $ do
wireVersion <- getWireVersion
when (wireVersion > 1) $ do
_ <- db $ insert "team" ["name" =: "Yankees", "league" =: "American"]
_ <- db $ insert "team" ["name" =: "Yankees", "league" =: "MiLB"]
_ <- db $ updateMany "team" [( ["name" =: "Yankees"]
, ["$set" =: ["league" =: "MLB"]]
, []
)]
updatedResult <- db $ rest =<< find ((select [] "team") {project = ["_id" =: (0 :: Int)]})
(L.sort $ map L.sort updatedResult) `shouldBe` [ ["league" =: "MLB", "name" =: "Yankees"]
, ["league" =: "MiLB", "name" =: "Yankees"]
]
it "can process different updates" $ do
wireVersion <- getWireVersion
when (wireVersion > 1) $ do
_ <- db $ insert "team" ["name" =: "Yankees", "league" =: "American"]
_ <- db $ insert "team" ["name" =: "Giants" , "league" =: "MiLB"]
_ <- db $ updateMany "team" [ ( ["name" =: "Yankees"]
, ["$set" =: ["league" =: "MiLB"]]
, []
)
, ( ["name" =: "Giants"]
, ["$set" =: ["league" =: "MLB"]]
, []
)
]
updatedResult <- db $ rest =<< find ((select [] "team") {project = ["_id" =: (0 :: Int)]})
(L.sort $ map L.sort updatedResult) `shouldBe` [ ["league" =: "MLB" , "name" =: "Giants"]
, ["league" =: "MiLB", "name" =: "Yankees"]
]
it "can process different updates" $ do
wireVersion <- getWireVersion
when (wireVersion > 1) $ do
_ <- db $ insert "team" ["name" =: "Yankees", "league" =: "American", "score" =: (Nothing :: Maybe Int)]
_ <- db $ insert "team" ["name" =: "Giants" , "league" =: "MiLB", "score" =: (1 :: Int)]
updateResult <- (db $ updateMany "team" [ ( ["name" =: "Yankees"]
, ["$inc" =: ["score" =: (1 :: Int)]]
, []
)
, ( ["name" =: "Giants"]
, ["$inc" =: ["score" =: (2 :: Int)]]
, []
)
])
failed updateResult `shouldBe` True
updatedResult <- db $ rest =<< find ((select [] "team") {project = ["_id" =: (0 :: Int)]})
(L.sort $ map L.sort updatedResult) `shouldBe` [ ["league" =: "American", "name" =: "Yankees", "score" =: (Nothing :: Maybe Int)]
, ["league" =: "MiLB" , "name" =: "Giants" , "score" =: (1 :: Int)]
]
it "can handle big updates" $ do
wireVersion <- getWireVersion
when (wireVersion > 1) $ do
let docs = (flip map) [0..20000] $ \i ->
["name" =: (T.pack $ "name " ++ (show i))]
ids <- db $ insertAll "bigCollection" docs
let updateDocs = (flip map) ids (\i -> ( [ "_id" =: i]
, ["$set" =: ["name" =: ("name " ++ (show i))]]
, []
))
_ <- db $ updateMany "team" updateDocs
updatedResult <- db $ rest =<< find (select [] "team")
forM_ updatedResult $ \r -> let (i :: ObjectId) = "_id" `at` r
in (("name" `at` r) :: String) `shouldBe` ("name" ++ (show i))
describe "updateAll" $ do
it "can process different updates" $ do
wireVersion <- getWireVersion
when (wireVersion > 1) $ do
_ <- db $ insert "team" ["name" =: "Yankees", "league" =: "American", "score" =: (Nothing :: Maybe Int)]
_ <- db $ insert "team" ["name" =: "Giants" , "league" =: "MiLB", "score" =: (1 :: Int)]
updateResult <- (db $ updateAll "team" [ ( ["name" =: "Yankees"]
, ["$inc" =: ["score" =: (1 :: Int)]]
, []
)
, ( ["name" =: "Giants"]
, ["$inc" =: ["score" =: (2 :: Int)]]
, []
)
])
failed updateResult `shouldBe` True
updatedResult <- db $ rest =<< find ((select [] "team") {project = ["_id" =: (0 :: Int)]})
(L.sort $ map L.sort updatedResult) `shouldBe` [ ["league" =: "American", "name" =: "Yankees", "score" =: (Nothing :: Maybe Int)]
, ["league" =: "MiLB" , "name" =: "Giants" , "score" =: (3 :: Int)]
]
it "returns correct number of matched and modified" $ do
wireVersion <- getWireVersion
when (wireVersion > 1) $ do
_ <- db $ insertMany "testCollection" [["myField" =: "myValue"], ["myField2" =: "myValue2"]]
_ <- db $ insertMany "testCollection" [["myField" =: "myValue"], ["myField2" =: "myValue2"]]
res <- db $ updateMany "testCollection" [(["myField" =: "myValue"], ["$set" =: ["myField" =: "newValue"]], [MultiUpdate])]
nMatched res `shouldBe` 2
nModified res `shouldBe` (Just 2)
it "returns correct number of upserted" $ do
wireVersion <- getWireVersion
when (wireVersion > 1) $ do
res <- db $ updateMany "testCollection" [(["myField" =: "myValue"], ["$set" =: ["myfield" =: "newValue"]], [Upsert])]
(length $ upserted res) `shouldBe` 1
it "updates only one doc without multi update" $ do
wireVersion <- getWireVersion
when (wireVersion > 1) $ do
_ <- db $ insertMany "testCollection" [["myField" =: "myValue"], ["myField2" =: "myValue2"]]
_ <- db $ insertMany "testCollection" [["myField" =: "myValue"], ["myField2" =: "myValue2"]]
res <- db $ updateMany "testCollection" [(["myField" =: "myValue"], ["$set" =: ["myField" =: "newValue"]], [])]
nMatched res `shouldBe` 1
nModified res `shouldBe` (Just 1)
describe "delete" $ do
it "actually deletes something" $ do
_ <- db $ insert "team" ["name" =: ("Giants" :: String)]
db $ delete $ select ["name" =: "Giants"] "team"
updatedResult <- db $ rest =<< find ((select [] "team") {project = ["_id" =: (0 :: Int)]})
length updatedResult `shouldBe` 0
it "deletes all matching entries" $ do
_ <- db $ insert "team" ["name" =: ("Giants" :: String)]
_ <- db $ insert "team" [ "name" =: ("Giants" :: String)
, "score" =: (10 :: Int)
]
db $ delete $ select ["name" =: "Giants"] "team"
updatedResult <- db $ rest =<< find ((select [] "team") {project = ["_id" =: (0 :: Int)]})
length updatedResult `shouldBe` 0
it "works if there is no matching document" $ do
db $ delete $ select ["name" =: "Giants"] "team"
updatedResult <- db $ rest =<< find ((select [] "team") {project = ["_id" =: (0 :: Int)]})
length updatedResult `shouldBe` 0
describe "deleteOne" $ do
it "actually deletes something" $ do
_ <- db $ insert "team" ["name" =: ("Giants" :: String)]
db $ deleteOne $ select ["name" =: "Giants"] "team"
updatedResult <- db $ rest =<< find ((select [] "team") {project = ["_id" =: (0 :: Int)]})
length updatedResult `shouldBe` 0
it "deletes only one matching entry" $ do
_ <- db $ insert "team" ["name" =: ("Giants" :: String)]
_ <- db $ insert "team" [ "name" =: ("Giants" :: String)
, "score" =: (10 :: Int)
]
db $ deleteOne $ select ["name" =: "Giants"] "team"
updatedResult <- db $ rest =<< find ((select [] "team") {project = ["_id" =: (0 :: Int)]})
length updatedResult `shouldBe` 1
it "works if there is no matching document" $ do
db $ deleteOne $ select ["name" =: "Giants"] "team"
updatedResult <- db $ rest =<< find ((select [] "team") {project = ["_id" =: (0 :: Int)]})
length updatedResult `shouldBe` 0
describe "deleteMany" $ do
it "actually deletes something" $ do
wireVersion <- getWireVersion
when (wireVersion > 1) $ do
_ <- db $ insert "team" ["name" =: ("Giants" :: String)]
_ <- db $ insert "team" ["name" =: ("Yankees" :: String)]
_ <- db $ deleteMany "team" [ (["name" =: ("Giants" :: String)], [])
, (["name" =: ("Yankees" :: String)], [])
]
updatedResult <- db $ rest =<< find ((select [] "team") {project = ["_id" =: (0 :: Int)]})
length updatedResult `shouldBe` 0
describe "deleteAll" $ do
it "actually deletes something" $ do
wireVersion <- getWireVersion
when (wireVersion > 1) $ do
_ <- db $ insert "team" [ "name" =: ("Giants" :: String)
, "score" =: (Nothing :: Maybe Int)
]
_ <- db $ insert "team" [ "name" =: ("Yankees" :: String)
, "score" =: (1 :: Int)
]
_ <- db $ deleteAll "team" [ (["name" =: ("Giants" :: String)], [])
, (["name" =: ("Yankees" :: String)], [])
]
updatedResult <- db $ rest =<< find ((select [] "team") {project = ["_id" =: (0 :: Int)]})
length updatedResult `shouldBe` 0
it "can handle big deletes" $ do
wireVersion <- getWireVersion
when (wireVersion > 1) $ do
let docs = (flip map) [0..20000] $ \i ->
["name" =: (T.pack $ "name " ++ (show i))]
_ <- db $ insertAll "bigCollection" docs
_ <- db $ deleteAll "bigCollection" $ map (\d -> (d, [])) docs
updatedResult <- db $ rest =<< find ((select [] "bigCollection") {project = ["_id" =: (0 :: Int)]})
length updatedResult `shouldBe` 0
it "returns correct result" $ do
wireVersion <- getWireVersion
when (wireVersion > 1) $ do
_ <- db $ insert "testCollection" [ "myField" =: "myValue" ]
_ <- db $ insert "testCollection" [ "myField" =: "myValue" ]
res <- db $ deleteAll "testCollection" [ (["myField" =: "myValue"], []) ]
nRemoved res `shouldBe` 2
describe "allCollections" $ do
it "returns all collections in a database" $ do
_ <- db $ insert "team1" ["name" =: "Yankees", "league" =: "American"]
_ <- db $ insert "team2" ["name" =: "Yankees", "league" =: "American"]
_ <- db $ insert "team3" ["name" =: "Yankees", "league" =: "American"]
collections <- db $ allCollections
liftIO $ (L.sort collections) `shouldContain` ["team1", "team2", "team3"]
describe "aggregate" $ before_ insertUsers $
it "aggregates to normalize and sort documents" $ do
result <- db $ aggregate "users" [ ["$project" =: ["name" =: ["$toUpper" =: "$_id"], "_id" =: 0]]
, ["$sort" =: ["name" =: 1]]
]
result `shouldBe` [["name" =: "JANE"], ["name" =: "JILL"], ["name" =: "JOE"]]
-- This feature was introduced in MongoDB version 3.2
-- https://docs.mongodb.com/manual/reference/command/find/
describe "findCommand" $ pendingIfMongoVersion (< (3,2)) $
context "when mongo version is 3.2 or superior" $ before insertUsers $ do
it "fetches all the records" $ do
result <- db $ rest =<< findCommand (select [] "users")
length result `shouldBe` 3
it "filters the records" $ do
result <- db $ rest =<< findCommand (select ["_id" =: "joe"] "users")
length result `shouldBe` 1
it "projects the records" $ do
result <- db $ rest =<< findCommand
(select [] "users") { project = [ "_id" =: 1 ] }
result `shouldBe` [["_id" =: "jane"], ["_id" =: "joe"], ["_id" =: "jill"]]
it "sorts the records" $ do
result <- db $ rest =<< findCommand
(select [] "users") { project = [ "_id" =: 1 ]
, sort = [ "_id" =: 1 ]
}
result `shouldBe` [["_id" =: "jane"], ["_id" =: "jill"], ["_id" =: "joe"]]