Add early returns for empty entries.

integration/hurl/tests_ok/color/color.ps1

@@ -1,4 +1,4 @@
 Set-StrictMode -Version latest
 $ErrorActionPreference = 'Stop'
 
-hurl  --color --verbose tests_ok/color/color.hurl
+hurl --color --verbose tests_ok/color/color.hurl

integration/hurl/tests_ok/color/color.sh

@@ -1,4 +1,4 @@
 #!/bin/bash
 set -Eeuo pipefail
 
-hurl  --color --verbose tests_ok/color/color.hurl
+hurl --color --verbose tests_ok/color/color.hurl

packages/hurl/src/runner/hurl_file.rs

@@ -153,6 +153,15 @@ pub fn run_entries(
     listener: Option<&dyn EventListener>,
     logger: &mut Logger,
 ) -> HurlResult {
+    // Early returns for empty entries.
+    if entries.is_empty() {
+        return HurlResult {
+            success: true,
+            variables: variables.clone(),
+            ..Default::default()
+        };
+    }
+
     let mut http_client = Client::new();
     let mut entries_result = vec![];
     let mut variables = variables.clone();