Use test-tag crate for tagging root tests

The way we specify the tests to run as root is non-obvious and
error-prone: we just include "sudo" inside a tests name and then filter
for that when running.
The test_tag crate provides first class support for tagging of tests,
which makes what is going on a bit more obvious. Switch over to using
it.

Signed-off-by: Daniel Müller <[email protected]>

Author: d-e-s-o

.github/workflows/test.yml

@@ -60,9 +60,9 @@ jobs:
       run: cargo build --profile=${{ matrix.profile }} --locked --verbose --workspace --exclude runqslower
     - name: Run tests
       # Skip tests which require sudo
-      run: cargo test --profile=${{ matrix.profile }} --locked --verbose --workspace --exclude runqslower -- --skip test_sudo_  --include-ignored
+      run: cargo test --profile=${{ matrix.profile }} --locked --verbose --workspace --exclude runqslower -- --skip ':root:'  --include-ignored
     - name: Run root tests
-      run: cd libbpf-rs && cargo test --profile=${{ matrix.profile }} --locked --verbose -- test_sudo_
+      run: cd libbpf-rs && cargo test --profile=${{ matrix.profile }} --locked --verbose -- ':root:'
 
   build-features:
     name: Build [${{ matrix.args }}]

Cargo.lock

@@ -37,6 +37,7 @@ probe = "0.3"
 scopeguard = "1.1"
 serial_test = { version = "3.0", default-features = false }
 tempfile = "3.3"
+test-tag = "0.1"
 
 # A set of unused dependencies that we require to force correct minimum versions
 # of transitive dependencies, for cases where our dependencies have incorrect