pretty up the page and allow for local calendars

src/tests.rs

@@ -80,6 +80,55 @@ END:VCALENDAR
     Ok(())
 }
 
+#[test]
+fn hand_written() -> Result<()> {
+    let s = r#"
+BEGIN:VCALENDAR
+
+COMMENT:August
+
+BEGIN:VEVENT
+DTSTART;TZID=America/Chicago:20250819T210000
+DTEND;TZID=America/Chicago:20250819T223000
+SUMMARY:Redacted
+END:VEVENT
+
+BEGIN:VEVENT
+DTSTART;TZID=America/Chicago:20250823T170000
+SUMMARY:Redacted
+URL:https://www.example.com
+END:VEVENT
+
+END:VCALENDAR
+"#;
+
+    let ical = ICal::read_from_str(s)?;
+    let params = Parameters {
+        ignore_before: chicago_time(2025, 1, 1, 0, 0, 0),
+        output_start: chicago_time(2025, 7, 1, 0, 0, 0),
+        output_stop: chicago_time(2025, 10, 1, 0, 0, 0),
+        tz: chrono_tz::America::Chicago,
+    };
+    let instances = ical.event_instances(&params)?;
+
+    assert_eq!(
+        [instances[0].dtstart, instances[1].dtstart,],
+        [
+            DatePerhapsTime {
+                dt: chicago_time(2025, 8, 19, 21, 0, 0),
+                all_day: false,
+            },
+            DatePerhapsTime {
+                dt: chicago_time(2025, 8, 23, 17, 0, 0),
+                all_day: false,
+            },
+        ]
+    );
+    assert_eq!(instances.len(), 2);
+
+    Ok(())
+}
+
 /// Expect that recurrent exceptions work correctly and don't duplicate events
 #[test]
 fn recurrence_exceptions() -> Result<()> {