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author | Daniel Mueller <deso@posteo.net> | 2019-01-05 21:41:22 -0800 |
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committer | Daniel Mueller <deso@posteo.net> | 2019-01-05 21:41:22 -0800 |
commit | 6d07a0c9d9a9b39247a9727dea2d90eba4e1fe9e (patch) | |
tree | 843fb189a543e6bc95ff9e5498f5ca2d09bc67a0 /libc/src/unix/notbsd/linux/musl/b32/x86.rs | |
parent | b750c4b13272908a51b85072008554c344b25016 (diff) | |
download | nitrocli-6d07a0c9d9a9b39247a9727dea2d90eba4e1fe9e.tar.gz nitrocli-6d07a0c9d9a9b39247a9727dea2d90eba4e1fe9e.tar.bz2 |
Supply customizable stdio channels to argparse
In order to properly test the program we need to have a way to
intercept data printed to the stdio channels. There are different ways
to accomplish that task. While it is reasonably easy to just start the
program as a dedicated process doing so properly may be problematic from
inside a test because either the path to the binary has to be retrieved
or cargo -- the entity which knows the path -- be invoked. None of these
approaches is very appealing from a testing and code complexity point of
view: an additional fork means additional sources of errors and
flakiness, executing cargo has the potential to even cause rebuilds of
parts of the program, and while we are already testing against a slow I/O
device this additional code running is unlikely to go unnoticed in the
long-term.
Lastly, doing so also means that we leave Rust's type safety behind when
dealing with errors that could be nicely match'ed on when the test
invocation is just a function call.
To avoid all this complexity we instead strive for basically just
running the main function.
This patch marks a first step towards achieving this goal. It introduces
the infrastructure to supply custom Write objects to the argument
parsing functionality. Once more we piggy-back on the command execution
context and add objects representing stdout and stderr to it. We further
ensure that this context is passed to the argument parser invocations.
Diffstat (limited to 'libc/src/unix/notbsd/linux/musl/b32/x86.rs')
0 files changed, 0 insertions, 0 deletions