Consistently use UnixNanos default

Author: cjdsellers

nautilus_core/core/src/nanos.rs

@@ -296,13 +296,13 @@ mod tests {
     #[rstest]
     #[should_panic(expected = "Error subtracting with underflow")]
     fn test_overflow_sub() {
-        let _ = UnixNanos::from(0) - UnixNanos::from(1); // This should panic due to underflow
+        let _ = UnixNanos::default() - UnixNanos::from(1); // This should panic due to underflow
     }
 
     #[rstest]
     #[should_panic(expected = "Error subtracting with underflow")]
     fn test_overflow_sub_u64() {
-        let _ = UnixNanos::from(0) - 1_u64; // This should panic due to underflow
+        let _ = UnixNanos::default() - 1_u64; // This should panic due to underflow
     }
 
     #[rstest]

nautilus_core/model/src/data/bar.rs

@@ -333,7 +333,7 @@ pub mod stubs {
             low: Price::from("1.00002"),
             close: Price::from("1.00003"),
             volume: Quantity::from("100000"),
-            ts_event: UnixNanos::from(0),
+            ts_event: UnixNanos::default(),
             ts_init: UnixNanos::from(1),
         }
     }
@@ -544,8 +544,8 @@ mod tests {
             low: Price::from("1.00002"),
             close: Price::from("1.00003"),
             volume: Quantity::from("100000"),
-            ts_event: UnixNanos::from(0),
-            ts_init: UnixNanos::from(0),
+            ts_event: UnixNanos::default(),
+            ts_init: UnixNanos::from(1),
         };
 
         let bar2 = Bar {
@@ -555,8 +555,8 @@ mod tests {
             low: Price::from("1.00002"),
             close: Price::from("1.00003"),
             volume: Quantity::from("100000"),
-            ts_event: UnixNanos::from(0),
-            ts_init: UnixNanos::from(0),
+            ts_event: UnixNanos::default(),
+            ts_init: UnixNanos::from(1),
         };
         assert_eq!(bar1, bar1);
         assert_ne!(bar1, bar2);

nautilus_core/model/src/data/trade.rs

@@ -147,7 +147,7 @@ pub mod stubs {
             size: Quantity::from("1.00000000"),
             aggressor_side: AggressorSide::Buyer,
             trade_id: TradeId::new("123456789").unwrap(),
-            ts_event: UnixNanos::from(0),
+            ts_event: UnixNanos::default(),
             ts_init: UnixNanos::from(1),
         }
     }