From 2fb3f257618a756605f9d89a994326ba71fe5f32 Mon Sep 17 00:00:00 2001
From: ClementTsang <clement.tsang@datadoghq.com>
Date: Fri, 24 Mar 2023 01:08:23 -0400
Subject: [PATCH] add test

---
 src/apple/macos/system.rs | 26 ++++++++++++++++++++++++++
 1 file changed, 26 insertions(+)

diff --git a/src/apple/macos/system.rs b/src/apple/macos/system.rs
index 1fbe13fc0..bf1fb233d 100644
--- a/src/apple/macos/system.rs
+++ b/src/apple/macos/system.rs
@@ -137,3 +137,29 @@ impl SystemTimeInfo {
         }
     }
 }
+
+#[cfg(test)]
+mod test {
+
+    use super::*;
+
+    /// Regression test for <https://github.com/GuillaumeGomez/sysinfo/issues/956>.
+    #[test]
+    fn test_getting_time_interval() {
+        if !crate::System::IS_SUPPORTED || cfg!(feature = "apple-sandbox") {
+            return;
+        }
+
+        let port = unsafe { libc::mach_host_self() };
+        let mut info = SystemTimeInfo::new(port).unwrap();
+        info.get_time_interval(port);
+
+        std::thread::sleep(crate::System::MINIMUM_CPU_UPDATE_INTERVAL.saturating_mul(2));
+
+        let val = info.get_time_interval(port);
+        assert!(
+            val > crate::System::MINIMUM_CPU_UPDATE_INTERVAL.as_secs_f64() * 1_000_000_000.0
+                / info.timebase_to_ns
+        );
+    }
+}