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From Bryan Cutler <>
Subject Re: Completing additional Arrow Java/C++ integration tests
Date Tue, 23 May 2017 22:24:45 GMT
Wes, I could do the Java side for dictionary integration testing.  It looks
like ARROW-693 might have stalled, I'll ping to see if any work has been


On Mon, May 22, 2017 at 2:26 PM, Wes McKinney <> wrote:

> hi folks,
> We've come a long way in our integration testing in the last 6 months.
> For those who haven't followed actively, the integration tests verify
> wire compatibility between Java and C++ streaming and file binary
> formats. We run these tests continuously in Travis CI, which makes it
> safe for developers to refactor and improve the IPC / wire format code
> without breaking cross-implementation compatibility. I expect in the
> near future we will also see some JavaScript integration tests.
> The integration test suite works as follows:
> * Test data is specified in an Arrow-specific JSON format
> * Each application reads the JSON and converts it to the Arrow binary
> format according to its implementation
> * The other application reads the binary and compares the binary to
> the JSON "point of truth" file
> What is still missing from the current test suite:
> - Dictionary tests
> - Fixed size list
> - Decimal tests (first available in C++ in 0.3.0)
> - Unions
> - Intervals
> Otherwise we have pretty good coverage of the rest of the data types
> in; a
> lot of work in Arrow 0.3.0 was reconciling the date and time types.
> For the next release 0.5.0 the most important thing to test is
> dictionaries. It would be nice to test decimals also, but we have some
> specification work to do as the in-memory format for Decimals in C++
> and Java is currently different.
> I should have time to implement the C++ side of the dictionary
> integration tests (i.e. converting to/from the JSON format), but
> someone will need to implement the Java side. It would be great if we
> could get this done in the next few weeks if anyone has the time to do
> it.
> Thanks
> Wes

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