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Adam Simpkins d5e3d5dd63 add initial test code for FUSE channel communication 
Summary:
This adds a FakeFuse class to simulate a FUSE connection to the kernel, but
that is actually communicating with our userspace test harness code.  This also
adds a FakePrivHelper class which implements the PrivHelper interface but
returns FakeFuse connections rather than real FUSE connections to the kernel.

This will enable us to write unit tests that exercise more of the FUSE and
EdenMount logic, and will also enable us to test error conditions and ordering
behaviors that are difficult to reliably reproduce with a real FUSE mount.

This also includes some very basic tests using this new code.  The code in
fuse/test/FuseChannelTest.cpp creates a FuseChannel using a FakeFuse object,
and the code in inodes/test/FuseTest.cpp creates a full EdenMount object using
FakePrivHelper and FakeFuse.  The tests are pretty similar for now, and only
exercise the FUSE initialization code.  I will expand these tests in subsequent
diffs.

Reviewed By: wez

Differential Revision: D7050826

fbshipit-source-id: 4f82375d65664ca3a5a228a577caa4d1d47454fe
2018-02-27 22:57:09 -08:00
common Remove TARGETS files 2018-02-20 19:57:45 -08:00
eden add initial test code for FUSE channel communication 2018-02-27 22:57:09 -08:00
external remove files related to open-source buck builds 2018-02-05 12:21:16 -08:00
.gitignore Initial commit 2016-05-12 14:09:13 -07:00
CONTRIBUTING.md Initial commit 2016-05-12 14:09:13 -07:00
getdeps.py getdeps: fix fbthrift build 2018-01-08 12:10:19 -08:00
LICENSE Initial commit 2016-05-12 14:09:13 -07:00
PATENTS Initial commit 2016-05-12 14:09:13 -07:00
README.md Fix a typo in Eden's README.md. 2016-05-13 09:32:03 -07:00

README.md

Eden

Eden is a project with several components, the most prominent of which is a virtual filesystem built using FUSE.

Caveat Emptor

Eden is still in early stages of development. We are making it available now because we plan to start making references to it from our other open source projects, such as Buck, Watchman, and Nuclide.

The version that we provide on GitHub does not build yet.

This is because the code is exported verbatim from an internal repository at Facebook, and not all of the scaffolding from our internal repository can be easily extracted. The key areas where we need to shore things up are:

  • The reinterpretations of build macros in DEFS.
  • A process for including third-party dependencies (presumably via Git submodules) and wiring up the external_deps argument in the build macros to point to them.
  • Providing the toolchain needed to power the [undocumented] thrift_library() rule in Buck.

The goal is to get Eden building on both Linux and OS X, though Linux support is expected to come first.