fix me lol

tests/ndi_runtime.rs

@@ -0,0 +1,86 @@
+//! Process-level checks for the NDI runtime boundary.
+//!
+//! These deliberately run the real binary in fresh processes so the loader's
+//! one-time cache cannot leak from one assertion into another.
+
+use std::path::PathBuf;
+use std::process::Command;
+use std::time::{SystemTime, UNIX_EPOCH};
+
+fn binary() -> &'static str {
+    env!("CARGO_BIN_EXE_video-output")
+}
+
+fn definitely_missing_runtime_dir() -> PathBuf {
+    let nonce = SystemTime::now()
+        .duration_since(UNIX_EPOCH)
+        .expect("the system clock should be after 1970")
+        .as_nanos();
+    std::env::temp_dir().join(format!(
+        "video-output-missing-ndi-runtime-{}-{nonce}",
+        std::process::id()
+    ))
+}
+
+#[test]
+fn missing_ndi_runtime_is_clear_and_does_not_affect_non_ndi_commands() {
+    let missing = definitely_missing_runtime_dir();
+
+    let ndi = Command::new(binary())
+        .args(["ndi-sources", "--timeout", "1"])
+        .env("NDI_RUNTIME_DIR_V6", &missing)
+        .env_remove("JOURNAL_STREAM")
+        .output()
+        .expect("run video-output ndi-sources");
+    assert!(!ndi.status.success(), "NDI discovery must fail without its runtime");
+
+    let diagnostic = format!(
+        "{}{}",
+        String::from_utf8_lossy(&ndi.stdout),
+        String::from_utf8_lossy(&ndi.stderr)
+    )
+    .to_ascii_lowercase();
+    assert!(
+        diagnostic.contains("could not load the ndi runtime"),
+        "expected a clear NDI loader error, got: {diagnostic}"
+    );
+
+    let version = Command::new(binary())
+        .arg("--version")
+        .env("NDI_RUNTIME_DIR_V6", &missing)
+        .env_remove("JOURNAL_STREAM")
+        .output()
+        .expect("run video-output --version");
+    assert!(
+        version.status.success(),
+        "a missing NDI runtime must not affect non-NDI commands: {}",
+        String::from_utf8_lossy(&version.stderr)
+    );
+    assert!(String::from_utf8_lossy(&version.stdout).contains("video-output"));
+}
+
+#[cfg(target_os = "linux")]
+#[test]
+fn elf_has_no_hard_dependency_on_libndi() {
+    let output = match Command::new("readelf").args(["-d", binary()]).output() {
+        Ok(output) => output,
+        Err(e) if e.kind() == std::io::ErrorKind::NotFound => {
+            eprintln!("skipping ELF dependency check: readelf is not installed");
+            return;
+        }
+        Err(e) => panic!("could not run readelf: {e}"),
+    };
+    assert!(
+        output.status.success(),
+        "readelf failed: {}",
+        String::from_utf8_lossy(&output.stderr)
+    );
+
+    let dynamic = String::from_utf8_lossy(&output.stdout);
+    let needed: Vec<&str> = dynamic.lines().filter(|line| line.contains("(NEEDED)")).collect();
+    assert!(
+        needed.iter().all(|line| !line.to_ascii_lowercase().contains("libndi")),
+        "binary acquired a hard NDI dependency:\n{}",
+        needed.join("\n")
+    );
+}