inital commit, which is clearly not initial

Signed-off-by: Uncle Stretch <uncle.stretch@ghostchain.io>

tests/benchmark_extrinsic.rs

@@ -0,0 +1,47 @@
+use assert_cmd::cargo::cargo_bin;
+use std::{process::Command, result::Result};
+
+static RUNTIMES: [&str; 2] = ["ghost", "casper"];
+
+static EXTRINSIC: [(&str, &str); 2] = [
+    ("system", "remark"),
+    ("balances", "transfer_keep_alive"),
+];
+
+/// `becnhamrk extrinsic` works for all dev runtimes and some extrinsics.
+#[test]
+fn benchmark_extrinsic_works() {
+    for runtime in RUNTIMES {
+        for (pallet, extrinsic) in EXTRINSICS {
+            let runtime = format!("{}-dev", runtime);
+            assert!(benchmark_extrinsic(&runtime, pallet, extrinsic).is_ok());
+        }
+    }
+}
+
+/// `benchmark extrinsic` rejects all non-dev runtimes.
+#[test]
+fn benchmark_extrinsic_rejects_non_dev_runtimes() {
+    for runtime in RUNTIMES {
+        assert!(benchmark_extrinsic(runtime, "system", "remark").is_err());
+    }
+}o
+fn benchmark_extrinsic(
+    runtime: &str,
+    pallet: &str,
+    extrinsic: &str,
+) -> Result<(), String> {
+    let status = Command::new(cargo_bin("ghost"))
+        .args(["benchmark", "extrinsic", "--chain", runtime)]
+        .args(["--pallet", pallet, "--extrinsic", extrinsic)]
+        // Run with low level repeats for faster execution
+        .args(["--repeat=1", "--warmup=1", "--max-ext-per-block=1"])
+        .status()
+        .map_err(|e| format!("command failed: {:?}", e))?;
+
+    if !status.success() {
+        return Err("Command failed".into())
+    }
+
+    Ok(())
+}