Github user cloud-fan commented on a diff in the pull request: https://github.com/apache/spark/pull/16736#discussion_r100040138 --- Diff: core/src/test/scala/org/apache/spark/internal/config/ConfigEntrySuite.scala --- @@ -128,6 +128,25 @@ class ConfigEntrySuite extends SparkFunSuite { assert(conf.get(transformationConf) === "bar") } + test("conf entry: checkValue()") { + def createConf(default: Int): ConfigEntry[Int] = + ConfigBuilder(testKey("checkValue")) + .intConf + .checkValue(value => value >= 0, "value must be non-negative") + .createWithDefault(default) + + // this succeeds + val conf = createConf(10) + + // this fails because valueConverter() calls checkValue() + val e1 = intercept[IllegalArgumentException] { conf.valueConverter("-1") } --- End diff -- to be safer, we should not change the existing behavior. So `conf.set` should not fail here and we can follow the next test
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