Rory Mitchell 24ad9dec0b
Testing hist_util (#5251)
* Rank tests

* Remove categorical split specialisation

* Extend tests to multiple features, switch to WQSketch

* Add tests for SparseCuts

* Add external memory quantile tests, fix some existing tests
2020-02-14 14:36:43 +13:00
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2020-02-14 14:36:43 +13:00