Github user tdas commented on a diff in the pull request:
https://github.com/apache/spark/pull/19327#discussion_r142335578
--- Diff:
sql/core/src/test/scala/org/apache/spark/sql/streaming/StreamingJoinSuite.scala
---
@@ -425,6 +426,10 @@ class StreamingJoinSuite extends StreamTest with
StateStoreMetricsTest with Befo
// Test static comparisons
assert(watermarkFrom("cast(leftTime AS LONG) > 10") === Some(10000))
+
+ // Test non-positive results
+ assert(watermarkFrom("CAST(leftTime AS LONG) > CAST(rightTime AS LONG)
- 10") === Some(0))
+ assert(watermarkFrom("CAST(leftTime AS LONG) > CAST(rightTime AS LONG)
- 100") === Some(-90000))
--- End diff --
These tests should be moved to a catalyst test suite
(SteamingJoinHelperSuite) as the code it tests has moved to the
StreamingJoinHelper.
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