Bugzilla

The L10nRegistry was originally written out of tree and then migrated in. When running `./mach rusttests` the unit tests and docs tests correctly run.

```
 0:09.91      Running unittests src/lib.rs (/Users/greg/dev/gecko/obj-ff-release/x86_64-apple-darwin/release/deps/l10nregistry-2922a2fc815d9b72)
 0:09.92 running 1 test
 0:09.92 test source::tests::calculate_source_pos ... ok
 0:09.92 test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s

...

 2:22.22    Doc-tests l10nregistry
 2:22.37 running 0 tests
 2:22.37 test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
```

However there are also [integration tests for l10nregistry-rs defined in the Cargo.toml](https://searchfox.org/mozilla-central/rev/a64647a2125cf3d334451051491fef6772e8eb57/intl/l10n/rust/l10nregistry-rs/Cargo.toml#60-83). Locally I can run them doing:

```
cd intl/l10n/rust/l10nregistry-rs
cargo test --all-features
```

However, these are not running in CI nor with `mach rusttests`. I tried looking a bit at the `rusttests` implementation, but couldn't really make sense of how it all works and actually runs the tests.

The [L10nRegistry](https://searchfox.org/mozilla-central/source/intl/l10n/rust/l10nregistry-rs) was originally written out of tree and then migrated in. When running `./mach rusttests` the unit tests and docs tests correctly run.

```
 0:09.91      Running unittests src/lib.rs (/Users/greg/dev/gecko/obj-ff-release/x86_64-apple-darwin/release/deps/l10nregistry-2922a2fc815d9b72)
 0:09.92 running 1 test
 0:09.92 test source::tests::calculate_source_pos ... ok
 0:09.92 test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s

...

 2:22.22    Doc-tests l10nregistry
 2:22.37 running 0 tests
 2:22.37 test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
```

However there are also [integration tests for l10nregistry-rs defined in the Cargo.toml](https://searchfox.org/mozilla-central/rev/a64647a2125cf3d334451051491fef6772e8eb57/intl/l10n/rust/l10nregistry-rs/Cargo.toml#60-83). Locally I can run them doing:

```
cd intl/l10n/rust/l10nregistry-rs
cargo test --all-features
```

However, these are not running in CI nor with `mach rusttests`. I tried looking a bit at the `rusttests` implementation, but couldn't really make sense of how it all works and actually runs the tests.