implement Debug and PartialEq for TimeSpan.

src/time/time_span.rs

@@ -1,7 +1,8 @@
 use super::TimePoint;
+use std::fmt::{self, Debug};
 
 /// Define a time span with a start time and an end time.
-#[derive(Clone, Copy)]
+#[derive(Clone, Copy, PartialEq)]
 pub struct TimeSpan {
  /// Start time of the span
  pub start: TimePoint,
@@ -16,3 +17,9 @@ impl TimeSpan {
  Self { start, end }
  }
 }
+
+impl Debug for TimeSpan {
+ fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+ write!(f, "{} --> {}", self.start, self.end)
+ }
+}