Merge branch 'rightlib' into mergelibs-241120-1113

1 files changed, 38 insertions, 0 deletions

diff --git a/yql/essentials/tests/s-expressions/suites/Casts/SafeCastOverNull.yql b/yql/essentials/tests/s-expressions/suites/Casts/SafeCastOverNull.yql
new file mode 100644
index 0000000000..6044a39e4e
--- /dev/null
+++ b/yql/essentials/tests/s-expressions/suites/Casts/SafeCastOverNull.yql
@@ -0,0 +1,38 @@
+(
+
+(let config (DataSource 'config))
+(let world (Configure! world config 'PureDataSource 'yt))
+(let res_sink (DataSink 'result))
+
+# Null -> Uint16
+(let cast (SafeCast (Null) (DataType 'Uint16)))
+(let world (Write! world res_sink (Key) cast '('('type))))
+
+# Null -> Uint16?
+(let cast (SafeCast (Null) (OptionalType (DataType 'Uint16))))
+(let world (Write! world res_sink (Key) cast '('('type))))
+
+# Just(Null) -> Null
+(let cast (SafeCast (Just (Null)) (NullType)))
+(let world (Write! world res_sink (Key) cast '('('type))))
+
+# Nothing(Null?) -> Null
+(let cast (SafeCast (Nothing (OptionalType (NullType))) (NullType)))
+(let world (Write! world res_sink (Key) cast '('('type))))
+
+# Uint16 -> Null
+(let cast (SafeCast (Uint16 '0) (NullType)))
+(let world (Write! world res_sink (Key) cast '('('type))))
+
+# Nothing(Uint16?) -> Null
+(let cast (SafeCast (Nothing (OptionalType (DataType 'Uint16))) (NullType)))
+(let world (Write! world res_sink (Key) cast '('('type))))
+
+# Null -> Null?
+(let cast (SafeCast (Null) (OptionalType (NullType))))
+(let world (Write! world res_sink (Key) cast '('('type))))
+
+(let world (Commit! world res_sink))
+(return world)
+
+)