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external files in test support on iOS #429

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external files in test support on iOS #429

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2 changes: 2 additions & 0 deletions src/bssl.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -38,6 +38,7 @@ macro_rules! bssl_test {
}

init::init_once();
::std::env::set_current_dir(::test::ring_src_path()).unwrap();
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I'm not quite sure why this is needed on iOS but not Android. Here's how we do it on Android; can we do the same thing on iOS?

ring/mk/travis.sh

Lines 82 to 90 in c84e411

adb wait-for-device
adb push $target_dir/ring-* /data/ring-test
for testfile in `find src crypto -name "*_test*.txt"`; do
adb shell mkdir -p /data/`dirname $testfile`
adb push $testfile /data/$testfile
done
adb shell mkdir -p /data/third-party/NIST
adb push third-party/NIST/SHAVS /data/third-party/NIST/SHAVS
adb shell 'cd /data && ./ring-test' 2>&1 | tee /tmp/ring-test

Also, why is it important to switch the current directory, instead of just changing file accesses to use the full path?

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On a non-jailbroken iOS, the only (known) way to start a process is to make it an app, and lauching it as an app. It will only be started with the working directory set to /, I could not find a way around that.

So we have two ways to solve this: using absolute paths (as I did for the pure Rust tests) or cd-ing to the right place just before running tests and keep relative paths. On principle, the first approach feels better as you're not altering what is basically a process-wide global variable. I used the cd strategy for the bn tests because I felt the required changes would be too invasive (as we need to pass the path through the rust-to-c test machinery), but if you feel otherwise, I can give it a shot.


let result = unsafe {
$bssl_test_main_fn_name()
Expand All @@ -61,6 +62,7 @@ macro_rules! bssl_test_rng {
}

init::init_once();
::std::env::set_current_dir(::test::ring_src_path()).unwrap();

let rng = rand::SystemRandom::new();
let mut rng = rand::RAND { rng: &rng };
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19 changes: 18 additions & 1 deletion src/test.rs
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Expand Up @@ -217,6 +217,23 @@ impl TestCase {
}
}

/// Returns the path for *ring* source code root.
///
/// On iOS, source are assumed to be copied in the application bundle, as
/// a "src" directory along the test runner.
#[cfg(target_os = "ios")]
pub fn ring_src_path() -> std::path::PathBuf {
std::env::current_exe().unwrap().parent().unwrap().join("src")
}

/// Returns the path for *ring* source code root.
///
/// On most platforms, the tests are run by cargo, so it's just the current
/// working directory.
#[cfg(not(target_os = "ios"))]
pub fn ring_src_path() -> std::path::PathBuf {
std::path::PathBuf::from(".")
}

/// Reads test cases out of the file with the path given by
/// `test_data_relative_file_path`, calling `f` on each vector until `f` fails
Expand All @@ -225,7 +242,7 @@ impl TestCase {
pub fn from_file<F>(test_data_relative_file_path: &str, mut f: F)
where F: FnMut(&str, &mut TestCase)
-> Result<(), error::Unspecified> {
let path = std::path::Path::new(test_data_relative_file_path);
let path = ring_src_path().join(test_data_relative_file_path);
let file = std::fs::File::open(path).unwrap();
let mut lines = std::io::BufReader::new(&file).lines();

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