display a nicer message when no entries are running with t now

src/commands/now.rs

@@ -40,6 +40,9 @@ impl<'a> Command<'a> for NowCommand {
 
         let (entries, needs_warning) = entries_or_warning(entries, &streams.db)?;
 
+        if entries.is_empty() {
+            streams.out.write_all(b"No running entries\n")?;
+        } else {
             let current = streams.db.current_sheet()?;
             let last = streams.db.last_sheet()?;
 
@@ -76,6 +79,7 @@ impl<'a> Command<'a> for NowCommand {
             }
 
             streams.out.write_all(tabs.print(facts.env.stdout_is_tty).as_bytes())?;
+        }
 
         warn_if_needed(&mut streams.err, needs_warning, &facts.env)?;
 
@@ -86,7 +90,7 @@ impl<'a> Command<'a> for NowCommand {
 #[cfg(test)]
 mod tests {
     use chrono::{Utc, TimeZone, Local};
-    use pretty_assertions::assert_eq;
+    use pretty_assertions::assert_str_eq;
 
     use crate::database::{SqliteDatabase, Database};
 
@@ -111,7 +115,7 @@ mod tests {
 
         NowCommand::handle(Default::default(), &mut streams, &facts).unwrap();
 
-        assert_eq!(&String::from_utf8_lossy(&streams.out), "  Timesheet   Running Activity
+        assert_str_eq!(&String::from_utf8_lossy(&streams.out), "  Timesheet   Running Activity
 
 - sheet4      1:52:45 some
 ");
@@ -128,14 +132,28 @@ mod tests {
 
         NowCommand::handle(Default::default(), &mut streams, &facts).unwrap();
 
-        assert_eq!(&String::from_utf8_lossy(&streams.out), "  Timesheet   Running Activity
+        assert_str_eq!(&String::from_utf8_lossy(&streams.out), "  Timesheet   Running Activity
 
 * default     0:10:24 que
 ");
 
-        assert_eq!(
+        assert_str_eq!(
             String::from_utf8_lossy(&streams.err),
             "[WARNING] You are using the old timetrap format, it is advised that you update your database using t migrate. To supress this warning set TIEMPO_SUPRESS_TIMETRAP_WARNING=1\n"
         );
     }
+
+    #[test]
+    fn with_no_running_entries_display_nicer_message() {
+        std::env::set_var("TZ", "CST+6");
+
+        let mut streams = Streams::fake(b"");
+        let now = Utc.ymd(2021, 1, 1).and_hms(13, 52, 45);
+        let facts = Facts::new().with_now(now);
+
+        NowCommand::handle(Default::default(), &mut streams, &facts).unwrap();
+
+        assert_str_eq!(&String::from_utf8_lossy(&streams.out), "No running entries
+");
+    }
 }