cloud-fan commented on code in PR #45963:
URL: https://github.com/apache/spark/pull/45963#discussion_r1560358232
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sql/core/src/test/scala/org/apache/spark/sql/CollationStringExpressionsSuite.scala:
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@@ -89,6 +89,73 @@ class CollationStringExpressionsSuite
testRepeat("UNICODE_CI", 3, "abc", 2)
}
+ test("Levenshtein expressions with collation") {
+ def prepareLevenshtein(
+ left: String,
+ right: String,
+ collation: String): Levenshtein = {
+ val collationId = CollationFactory.collationNameToId(collation)
+ val leftLit = Literal.create(left, StringType(collationId))
+ val rightLit = Literal.create(right, StringType(collationId))
+ Levenshtein(leftLit, rightLit)
+ }
+
+ Seq(
+ // scalastyle:off nonascii
+ CollationTestCase("", "", "UTF8_BINARY", 0),
+ CollationTestCase("", "something", "UTF8_BINARY", 9),
+ CollationTestCase("a", "a", "UTF8_BINARY", 0),
+ CollationTestCase("a", "A", "UTF8_BINARY", 1),
+ CollationTestCase("a", "a", "UTF8_BINARY_LCASE", 0),
+ CollationTestCase("a", "A", "UTF8_BINARY_LCASE", 0),
+ CollationTestCase("bd", "ABc", "UTF8_BINARY_LCASE", 2),
+ CollationTestCase("Xü", "Ü", "UTF8_BINARY_LCASE", 1),
+ CollationTestCase("Xũ", "Üx", "UTF8_BINARY_LCASE", 2),
+ CollationTestCase("", "something", "UTF8_BINARY_LCASE", 9),
+ CollationTestCase("sOmeThINg", "SOMETHING", "UTF8_BINARY_LCASE", 0),
+ CollationTestCase("sOmeThINg", "SOMETHING", "UNICODE", 5),
+ CollationTestCase("sOmeThINg", "SOMETHING", "UNICODE_CI", 0)
+ // scalastyle:on nonascii
+ ).foreach(c => checkEvaluation(prepareLevenshtein(c.s1, c.s2,
c.collation), c.expectedResult))
+ }
+
Review Comment:
Yea we need both unit tests and end-to-end tests
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