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server: add tests for transaction commit/rollback
PR-URL: https://github.com/hasura/graphql-engine-mono/pull/3418 GitOrigin-RevId: fde6ce718cebabed53c90369215358c248a9658f
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Evie Ciobanu
hasura-bot
parent
abefdd31d0
commit
dc113cc2b8
@ -125,7 +125,7 @@ singleRowQueryE ef = rawQueryE ef singleRowResult
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-- @
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--
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-- See 'multiRowQueryE' if you need to map the error type as well.
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multiRowQuery :: (MonadIO m, FromRow a) => ODBC.Query -> TxT m [a]
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multiRowQuery :: forall a m. (MonadIO m, FromRow a) => ODBC.Query -> TxT m [a]
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multiRowQuery = multiRowQueryE id
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-- | Useful for building query transactions which return multiple rows.
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@ -1,109 +1,251 @@
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module Database.MSSQL.TransactionSpec (spec) where
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import Control.Exception.Base (bracket)
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import Data.ByteString
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import Data.ByteString (ByteString)
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import Database.MSSQL.Pool
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import Database.MSSQL.Transaction
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import Database.ODBC.SQLServer as ODBC
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( ODBCException (DataRetrievalError, UnsuccessfulReturnCode),
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Query,
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)
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import Hasura.Prelude
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import Test.Hspec
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-- | Describe a TransactionSpec test, see 'runTest' for additional details.
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data TestCase a = TestCase
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{ -- | Specifies which transactions to run. They will be executed sequentially,
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-- and the value of the last query in the last transaction will be compared
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-- against 'expectation'.
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--
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-- Has to be non-empty (but kept as a list for simplicity/convenience).
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transactions :: [Transaction],
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-- | Expected result of the test. 'Right' represents a successful outcome.
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--
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-- Left is presented as a function because we want to be able to partially
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-- match error (messages).
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expectation :: Either (MSSQLTxError -> Expectation) a,
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-- | Which kind of parser to use on the last query of the last transaction:
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--
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-- * 'unitQuery' for queries returning '()'
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-- * 'singleRowQuery' for queries returning 'a'
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-- * 'multiRowQuery' for queries returning '[a]'
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--
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-- Use 'TypeApplications' to specify the return type (needed to disambiguate
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-- the 'a' type parameter when needed).
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runWith :: Query -> TxT IO a,
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-- | Description for the test, used in the test output.
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description :: String
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}
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newtype Transaction = Transaction
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{ unTransaction :: [Query]
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}
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spec :: Text -> Spec
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spec connString = do
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describe "runTx" $ do
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it "runs command in a transaction" $ do
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result <- runInConn connString selectQuery
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result `shouldBe` Right 1
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runBasicChecks connString
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transactionStateTests connString
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it "commits a successful transaction, returning a single field" $ do
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_ <- runInConn connString insertIdQuery
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result <- runInConn connString selectIdQuery
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result `shouldBe` Right 2
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runBasicChecks :: Text -> Spec
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runBasicChecks connString =
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describe "runTx transaction basic checks" $ do
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run
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TestCase
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{ transactions =
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[ Transaction
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[ "CREATE TABLE SingleCol (ID INT)",
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"INSERT INTO SingleCol VALUES (2)",
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"SELECT ID FROM SingleCol"
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]
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],
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expectation = Right 2,
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runWith = singleRowQuery @Int,
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description = "CREATE, INSERT, SELECT single column"
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}
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it "commits a successful transaction, returning multiple fields" $ do
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_ <- runInConn connString insertNameQuery
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result <- runInConn connString selectIdNameQuery
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result `shouldBe` Right (2, "A")
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run
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TestCase
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{ transactions =
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[ Transaction
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[ "CREATE TABLE MultiCol (ID INT, NAME VARCHAR(1))",
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"INSERT INTO MultiCol VALUES (2, 'A')",
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"SELECT ID, NAME FROM MultiCol"
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]
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],
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expectation = Right (2, "A"),
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runWith = singleRowQuery @(Int, ByteString),
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description = "CREATE, INSERT, SELECT single multiple columns"
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}
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it "an unsuccesful transaction, expecting Int" $ do
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result <- runInConn connString selectIntQueryFail
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either
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(matchDataRetrievalError "Expected Int, but got: ByteStringValue \"hello\"")
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(\r -> expectationFailure $ "expected Left, returned " <> show r)
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result
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run
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TestCase
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{ transactions = [Transaction ["SELECT 'hello'"]],
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expectation = matchDataRetrievalError "Expected Int, but got: ByteStringValue \"hello\"",
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runWith = singleRowQuery @Int,
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description = "SELECT the wrong type"
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}
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it "a successfull query expecting multiple rows" $ do
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result <- runInConn connString selectMultipleIdQuery
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result `shouldBe` Right [1, 2]
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run
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TestCase
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{ transactions = [Transaction ["select * from (values (1), (2)) as x(a)"]],
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expectation = Right [1, 2],
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runWith = multiRowQuery @Int,
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description = "SELECT multiple rows"
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}
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it "an unsuccesful transaction; expecting single row" $ do
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result <- runInConn connString selectIdQueryFail
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either
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(matchDataRetrievalError "expecting single row")
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(\r -> expectationFailure $ "expected Left, returned " <> show r)
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result
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run
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TestCase
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{ transactions = [Transaction ["select * from (values (1), (2)) as x(a)"]],
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expectation = matchDataRetrievalError "expecting single row",
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runWith = singleRowQuery @Int,
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description = "SELECT multiple rows, expect single row"
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}
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it "displays the SQL Server error on an unsuccessful transaction" $ do
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result <- runInConn connString badQuery
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either
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(matchQueryError (UnsuccessfulReturnCode "odbc_SQLExecDirectW" (-1) invalidSyntaxError))
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(\() -> expectationFailure "expected Left, returned ()")
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result
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run
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TestCase
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{ transactions =
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[ Transaction
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[ "CREATE TABLE BadQuery (ID INT, INVALID_SYNTAX)",
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"INSERT INTO BadQuery VALUES (3)"
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]
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],
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expectation =
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matchQueryError
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(UnsuccessfulReturnCode "odbc_SQLExecDirectW" (-1) invalidSyntaxError),
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runWith = unitQuery,
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description = "Bad syntax error/transaction rollback"
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}
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where
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-- Partially apply connString to runTest for convenience
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run :: forall a. Eq a => Show a => TestCase a -> Spec
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run = runTest connString
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it "rolls back an unsuccessful transaction" $ do
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_ <- runInConn connString badQuery
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result <- runInConn connString selectIdQuery
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either
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(\err -> expectationFailure $ "expected Right, returned " <> show err)
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(\value -> value `shouldNotBe` 3)
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result
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-- | Test COMMIT and ROLLBACK for Active and NoActive states.
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--
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-- The Uncommittable state can be achieved by running the transaction enclosed
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-- in a TRY..CATCH block, which is not currently doable with our current API.
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-- Consider changing the API to allow such a test if we ever end up having
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-- bugs because of it.
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transactionStateTests :: Text -> Spec
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transactionStateTests connString =
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describe "runTx Transaction State -> Action" $ do
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run
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TestCase
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{ transactions = [Transaction ["SELECT 1"]],
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expectation = Right 1,
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runWith = singleRowQuery @Int,
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description = "Active -> COMMIT"
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}
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it "displays the connection error on an invalid connection string" $ do
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invalidPool <- createMinimalPool "some random invalid connection string"
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result <- runExceptT $ runTx selectQuery invalidPool
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either
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(`shouldBe` MSSQLConnError (UnsuccessfulReturnCode "odbc_SQLDriverConnect" (-1) invalidConnStringError))
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(\r -> expectationFailure $ "expected Left, returned " ++ show r)
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result
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run
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TestCase
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{ transactions =
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[ Transaction
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[ "CREATE TABLE SingleCol (ID INT)",
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"INSERT INTO SingleCol VALUES (2)"
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],
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Transaction -- Fail
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[ "CREATE TABLE BadQuery (ID INT, INVALID_SYNTAX)",
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"UPDATE SingleCol SET ID=3"
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],
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Transaction ["SELECT ID FROM SingleCol"] -- Grab data from setup
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],
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expectation = Right 2,
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runWith = singleRowQuery @Int,
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description = "Active -> ROLLBACK"
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}
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selectQuery :: TxT IO Int
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selectQuery = singleRowQuery "SELECT 1"
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run
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TestCase
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{ transactions =
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[ Transaction -- Fail
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["COMMIT; SELECT 1"]
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],
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expectation =
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Left
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(`shouldBe` MSSQLInternal "No active transaction exist; cannot commit"),
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runWith = singleRowQuery @Int,
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description = "NoActive -> COMMIT"
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}
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run
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TestCase
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{ transactions =
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[ Transaction
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[ "COMMIT;",
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"CREATE TABLE BadQuery (ID INT, INVALID_SYNTAX)"
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]
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],
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-- We should get the error rather than the cannot commit error from the
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-- NoActive -> Commit test.
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expectation =
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matchQueryError
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(UnsuccessfulReturnCode "odbc_SQLExecDirectW" (-1) invalidSyntaxError),
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runWith = unitQuery,
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description = "NoActive -> ROLLBACK"
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}
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where
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-- Partially apply connString to runTest for convenience
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run :: forall a. Eq a => Show a => TestCase a -> Spec
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run = runTest connString
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selectIntQueryFail :: TxT IO Int
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selectIntQueryFail = singleRowQuery "SELECT 'hello'"
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-- | Run a 'TestCase' by executing the queries in order. The last 'ODBC.Query'
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-- is the one we check he result against.
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--
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-- Beacuse we don't know the type of the result, we need it supplied as part
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-- of the 'TestCase':
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--
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-- * 'unitQuery' for queries returning '()'
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-- * 'singleRowQuery' for queries returning 'a'
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-- * 'multiRowQuery' for queries returning '[a]'
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--
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-- Note that we need to use TypeApplications on the 'runWith' function for type
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-- checking to work, especially if the values are polymorphic
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-- (e.g. numbers or strings).
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--
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-- Please also note that we are discarding 'Left's from "setup" transactions
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-- (all but the last transaction). See the 'runSetup' helper below.
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runTest :: forall a. Eq a => Show a => Text -> TestCase a -> Spec
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runTest connString TestCase {..} =
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it description do
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case reverse transactions of
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[] -> expectationFailure "Empty transaction list: nothing to do."
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(mainTransaction : leadingTransactions) -> do
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-- Run all transactions before the last (main) transaction.
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runSetup (reverse leadingTransactions)
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-- Get the result from the last transaction.
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result <-
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runInConn connString $
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runQueries runWith $
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unTransaction mainTransaction
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case (result, expectation) of
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-- Validate the error is the one we were expecting.
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(Left err, Left expected) ->
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expected err
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-- Verify the success result is the expected one.
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(Right res, Right expected) ->
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res `shouldBe` expected
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-- Expected success but got error. Needs special case because the expected
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-- Left is a validator (function).
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(Left err, Right expected) ->
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expectationFailure $
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"Expected " <> show expected <> " but got error: " <> show err
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-- Expected error but got success. Needs special case because the expected
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-- Left is a validator (function).
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(Right res, Left _) ->
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expectationFailure $
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"Expected error but got success: " <> show res
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where
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runSetup :: [Transaction] -> IO ()
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runSetup [] = pure ()
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runSetup (t : ts) = do
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-- Discards 'Left's.
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_ <- runInConn connString (runQueries unitQuery $ unTransaction t)
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runSetup ts
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selectIdQueryFail :: TxT IO Int
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selectIdQueryFail = singleRowQuery "select * from (values (1), (2)) as x(a)"
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selectMultipleIdQuery :: TxT IO [Int]
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selectMultipleIdQuery = multiRowQuery "select * from (values (1), (2)) as x(a)"
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insertIdQuery :: TxT IO ()
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insertIdQuery =
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unitQuery
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"CREATE TABLE SingleCol (ID INT);INSERT INTO SingleCol VALUES (2);"
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selectIdQuery :: TxT IO Int
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selectIdQuery =
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singleRowQuery
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"SELECT ID FROM SingleCol;"
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insertNameQuery :: TxT IO ()
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insertNameQuery =
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unitQuery
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"CREATE TABLE MultiCol (ID INT, NAME VARCHAR(1));INSERT INTO MultiCol VALUES (2, 'A');"
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selectIdNameQuery :: TxT IO (Int, ByteString)
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selectIdNameQuery =
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singleRowQuery
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"SELECT ID, NAME FROM MultiCol;"
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badQuery :: TxT IO ()
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badQuery =
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unitQuery
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"CREATE TABLE BadQuery (ID INT, INVALID_SYNTAX);INSERT INTO BadQuery VALUES (3);"
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runQueries :: (Query -> TxT IO x) -> [Query] -> TxT IO x
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runQueries _ [] = error $ "Expected at least one query per transaction in " <> description
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runQueries f [q] = f q
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runQueries f (x : xs) = unitQuery x *> runQueries f xs
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-- | spec helper functions
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runInConn :: Text -> TxT IO a -> IO (Either MSSQLTxError a)
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@ -121,9 +263,14 @@ invalidSyntaxError :: String
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invalidSyntaxError =
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"[Microsoft][ODBC Driver 17 for SQL Server][SQL Server]The definition for column 'INVALID_SYNTAX' must include a data type."
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invalidConnStringError :: String
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invalidConnStringError =
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"[unixODBC][Driver Manager]Data source name not found and no default driver specified[unixODBC][Driver Manager]Data source name not found and no default driver specified"
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matchDataRetrievalError :: String -> Either (MSSQLTxError -> Expectation) a
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matchDataRetrievalError = matchQueryError . DataRetrievalError
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matchQueryError :: ODBCException -> Either (MSSQLTxError -> Expectation) a
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matchQueryError expectedErr = Left $ \case
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MSSQLQueryError _ err -> err `shouldBe` expectedErr
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MSSQLConnError _ -> expectationFailure unexpectedMSSQLConnError
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MSSQLInternal _ -> expectationFailure unexpectedMSSQLInternalError
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unexpectedMSSQLInternalError :: String
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unexpectedMSSQLInternalError =
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@ -132,13 +279,3 @@ unexpectedMSSQLInternalError =
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unexpectedMSSQLConnError :: String
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unexpectedMSSQLConnError =
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"Expected MSSQLQueryError, but got: MSSQLConnError"
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matchDataRetrievalError :: String -> MSSQLTxError -> Expectation
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matchDataRetrievalError errMessage =
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matchQueryError (DataRetrievalError errMessage)
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matchQueryError :: ODBCException -> MSSQLTxError -> Expectation
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matchQueryError expectedErr = \case
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MSSQLQueryError _ err -> err `shouldBe` expectedErr
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MSSQLConnError _ -> expectationFailure unexpectedMSSQLConnError
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MSSQLInternal _ -> expectationFailure unexpectedMSSQLInternalError
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