Write some tests to handle date parsing with a range of days

sgf/src/game.rs

@@ -911,4 +911,40 @@ mod file_test {
             },
         );
     }
+
+    #[ignore]
+    #[test]
+    fn it_handles_shuwa_genan_file() {
+        with_file(
+            std::path::Path::new("test_data/2019.02.15_shuwa_genan_annotated.sgf"),
+            |trees| {
+                assert_eq!(trees.len(), 1);
+                let game = &trees[0];
+                assert_eq!(game.game_type, GameType::Go);
+                assert_eq!(
+                    game.board_size,
+                    Size {
+                        width: 19,
+                        height: 19
+                    }
+                );
+                assert_eq!(
+                    game.black_player,
+                    Player {
+                        name: Some("Honinbo Shuwa".to_owned()),
+                        rank: Some("7P".to_owned()),
+                        team: None
+                    }
+                );
+                assert_eq!(
+                    game.white_player,
+                    Player {
+                        name: Some("Inoue(Genan)Inseki".to_owned()),
+                        rank: Some("8P".to_owned()),
+                        team: None
+                    }
+                );
+            },
+        )
+    }
 }

sgf/src/go.rs

@@ -463,4 +463,15 @@ mod tests {
             },
         );
     }
+
+    // This is a file 
+    #[test]
+    fn it_handles_shuwa_genan_file() {
+        with_file(
+            std::path::Path::new("test_data/2020 USGO DDK, Round 1.sgf"),
+            |trees| {
+                assert_eq!(trees.len(), 2);
+            },
+        )
+    }
 }

sgf/src/parser.rs

@@ -1252,6 +1252,15 @@ mod date_test {
                 Date::Date(NaiveDate::from_ymd_opt(1996, 12, 28).unwrap())
             ])
         );
+
+        assert_matches!(
+            parse_date_field::<nom::error::VerboseError<&str>>().parse("1842-5-16-18"),
+            Ok((_, date)) => assert_eq!(date, vec![
+                Date::Date(NaiveDate::from_ymd_opt(1842, 5, 16).unwrap()),
+                Date::Date(NaiveDate::from_ymd_opt(1842, 5, 17).unwrap()),
+                Date::Date(NaiveDate::from_ymd_opt(1842, 5, 18).unwrap()),
+            ])
+        );
     }
 
     #[test]