tests: Add a function to exec snphost for tests

Signed-off-by: Tyler Fanelli <[email protected]>

tests/util/mod.rs

@@ -0,0 +1,21 @@
+// SPDX-License-Identifier: Apache-2.0
+
+use std::process:Command;
+
+pub const SNPHOST: &'static str = env!("CARGO_BIN_EXE_snphost");
+
+pub fn run(arglist: &[&str]) -> String {
+    let output = Command::new(SNPHOST).args(arglist).output().unwrap();
+
+    let stdout = String::from_utf8(output.stdout).unwrap();
+    let stderr = String::from_utf8(output.stderr).unwrap();
+
+    if !output.status.success() {
+        panic!(
+            "\nsnphost command failed.\narglist={:?}\nstdout={}\nstderr={}\n",
+            arglist, stdout, stderr
+        );
+    }
+
+    stdout
+}