Fix testing for s390x

.github/workflows/checks.yaml

@@ -107,6 +107,7 @@ jobs:
             features: ""
             target: "s390x-unknown-linux-gnu"
             gcc: "s390x-linux-gnu-gcc"
+            runner: "qemu-s390x -L /usr/s390x-linux-gnu"
           - rust: stable
             os: ubuntu-latest
             features: ""
@@ -140,7 +141,7 @@ jobs:
       - name: cargo build
         run: cargo build --target ${{matrix.target}} ${{ matrix.features }}
       - name: cargo nextest # reports segfaults in a helpful way
-        run: cargo nextest run --target ${{matrix.target}} ${{ matrix.features }}
+        run: RUNNER="${{ matrix.target }}" cargo nextest run --target ${{matrix.target}} ${{ matrix.features }}
         env:
           RUST_BACKTRACE: 1
           CC: ${{matrix.gcc}}

tests/quick.rs

@@ -1,11 +1,27 @@
+use std::env;
+use std::process::{Command, Stdio};
+
 fn run_test(compressed: &str, expected: &[u8]) {
-    let output = std::process::Command::new(env!("CARGO_BIN_EXE_bzip2"))
+    let mut cmd;
+    match env::var("RUNNER") {
+        Ok(runner) if !runner.is_empty() => {
+            let mut runner_args = runner.split(' ');
+            cmd = Command::new(runner_args.next().unwrap());
+            cmd.args(runner_args);
+            cmd.arg(env!("CARGO_BIN_EXE_bzip2"));
+        }
+        _ => cmd = Command::new(env!("CARGO_BIN_EXE_bzip2")),
+    }
+    let output = match cmd
         .arg("-d")
         .arg(compressed)
         .arg("-c")
-        .stdout(std::process::Stdio::piped())
+        .stdout(Stdio::piped())
         .output()
-        .unwrap();
+    {
+        Ok(output) => output,
+        Err(err) => panic!("Running {cmd:?} failed with {err:?}"),
+    };
     assert!(
         output.status.success(),
         "status: {:?} stderr: {:?}",