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HHI files for DbUnit

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This package provides HHI files for the DbUnit package. It does not provide any runtime functionality.

HHI files are files which tell the Hack tools about non-Hack code, providing the necessary names and types to allow Hack to make sure you're using the non-Hack code correctly.


The easiest way to install this package is with Composer.

To do so, add "91carriage/dbunit-hhi": "~2.0.0" to the require-dev section of your composer.json or run composer require --dev '91carriage/dbunit-hhi:~2.0.0'.

It is not recommended to install this as part of your requires section as it should only be used during development.

Manual installation simply involves downloading the provided source code and copying it into your repository.


Issues can be submitted to the issue tacker.

If you are unable to create an issue through this, or think that it should not be publicly disclosed, they can also be emailed directly to or brought to my attention on IRC, where I go by the handles simon_w and simon_w|air in the offical #hhvm channel on FreeNode.


Contributions are very welcome. Please make sure that you run hh_client in the source directory with assume_php=false in your .hhconfig and no errors are reported.

Code style

For Hack files, the coding style is enforced by the hh_format command, which is included with the Hack tools alongside hh_client. As the files are decl files, you need to run hh_format with the --yolo option.

For other files, the basic requirements are:

  • Lines are no more than 80 characters wherever possible.
  • Indentation is 2 spaces.
  • Unix-style (\n) line endings.

File types

As these are HHI files, all files should be in decl mode.

Non-existent class types

If an object type is required and that object is in a different package or is built into HHVM and doesn't yet have a HHI file, add the expected type as a comment.

For example, if the function foo returns a SplObject and there's no inbuilt HHI file for SplObject, the definition of foo would be:

function foo() /*: SplObject*/;


This code is provided under the MIT (X11 variant) license. The full text of which can be found in the file.