Add cli_run test for env.roc

crates/cli_utils/src/helpers.rs

@@ -161,10 +161,11 @@ where
     }
 }
 
-pub fn run_cmd<'a, I: IntoIterator<Item = &'a str>>(
+pub fn run_cmd<'a, I: IntoIterator<Item = &'a str>, E: IntoIterator<Item = (&'a str, &'a str)>>(
     cmd_name: &str,
     stdin_vals: I,
     args: &[String],
+    env: E,
 ) -> Out {
     let mut cmd = Command::new(cmd_name);
 
@@ -172,6 +173,10 @@ pub fn run_cmd<'a, I: IntoIterator<Item = &'a str>>(
         cmd.arg(arg);
     }
 
+    for (env, val) in env.into_iter() {
+        cmd.env(env, val);
+    }
+
     let mut child = cmd
         .stdin(Stdio::piped())
         .stdout(Stdio::piped())