tests: migrate unit tests to Rust

To avoid issues like python2 not available on distros, we should simply migrate unit tests to Rust. That would make more sense, as the main code is already written in Rust. Adding edition in Cargo.toml. Without edition = 2021, build fails due to a missing "extern crate subprocess". Specifying an edition, Build passes without having to add it. To run unit tests sequentially as expected, add an option --test-threads=1 to CI.
flatcar · Jul 13, 2023 · 08ba464 · 08ba464
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commit 08ba464
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Showing 6 changed files with 458 additions and 266 deletions.
diff --git a/.github/workflows/rust.yml b/.github/workflows/rust.yml
@@ -19,4 +19,4 @@ jobs:
     - name: Build
       run: cargo build --verbose
     - name: Run tests
-      run: cargo test --verbose
+      run: cargo test --verbose -- --test-threads=1
diff --git a/Cargo.lock b/Cargo.lock
diff --git a/Cargo.toml b/Cargo.toml
@@ -7,6 +7,7 @@ repository = "https://github.com/coreos/update-ssh-keys"
 documentation = "https://docs.rs/update-ssh-keys"
 description = "A tool for managing authorized SSH keys"
 version = "0.4.2-alpha.0"
+edition = "2021"
 
 [dependencies]
 # Private dependencies.
@@ -16,6 +17,7 @@ fs2 = "0.4"
 error-chain = { version = "0.12", default-features = false }
 openssh-keys = { git = "https://github.com/pothos/openssh-keys", branch = "add-sk-keys" }
 users = "0.9"
+lazy_static = "1.4.0"
 
 [[bin]]
 name = "update-ssh-keys"

diff --git a/tests/compat_python.rs b/tests/compat_python.rs
diff --git a/tests/test_update_ssh_keys.py b/tests/test_update_ssh_keys.py