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Ship it! cool stuff! - xiaojian zhou On Feb. 2, 2017, 9:35 p.m., Galen O'Sullivan wrote: > > ----------------------------------------------------------- > This is an automatically generated e-mail. To reply, visit: > https://reviews.apache.org/r/56242/ > ----------------------------------------------------------- > > (Updated Feb. 2, 2017, 9:35 p.m.) > > > Review request for geode, Bruce Schuchardt, Hitesh Khamesra, Kirk Lund, and > Udo Kohlmeyer. > > > Repository: geode > > > Description > ------- > > This adds a test dependency on `junit-quickcheck` (and > `junit-quickcheck-generators` and `junit-quickcheck-guava`) to geode-core. > I've included an example test of one of the cases in which property-based > testing is particularly nice: when you have two operations that should > reverse each other and want to test them with as much garbage as possible. > > Property-based testing means basically that you write a function that tests > some code and checks some conditions you expect to hold true for all inputs, > and then have a computer program test all sorts of weird inputs to try prove > you wrong. > > Because the test data is randomly generated, you get to test against more > inputs than you might even think of, and because the seed is saved, the test > is reproducible. If `junit-quickcheck` finds one failure, it will even try to > narrow down to a smallest example of a test failure. > > I'm about to send an email to the dev list soliciting feedback. > > > Diffs > ----- > > geode-core/build.gradle 3c2a2abf5 > > geode-core/src/test/java/org/apache/geode/internal/InternalDataSerializerQuickcheckStringTest.java > PRE-CREATION > > geode-core/src/test/java/org/apache/geode/internal/InternalDataSerializerRandomizedJUnitTest.java > f361de4a2 > gradle/dependency-versions.properties fbc76e012 > > Diff: https://reviews.apache.org/r/56242/diff/ > > > Testing > ------- > > The test passes on my machine. This is mostly just adding a dependency, so > there's not a lot here to test. > > I've read some of the source of junit-quickcheck and looked into the data it > generates: integral numbers seem pretty reasonable. Strings tend to be > short-ish (length up to hundreds with hundreds of iterations, thousands with > thousands), but are made up of random codepoints, which is nice. > > > Thanks, > > Galen O'Sullivan > >
