Set zone variant for unknown zones (#5695)

This should not be a missing field error.

Author: robertbastian

components/datetime/tests/fixtures/tests/components_with_zones.json

@@ -23,7 +23,7 @@
         },
         "output": {
             "values": {
-                "en": "Tuesday, January 21, 2020, 08:25:07 {v}"
+                "en": "Tuesday, January 21, 2020, 08:25:07 Unknown City Time"
             }
         }
     },
@@ -51,7 +51,7 @@
         },
         "output": {
             "values": {
-                "en": "Tuesday, January 21, 2020, 08:25:07 {v}"
+                "en": "Tuesday, January 21, 2020, 08:25:07 Unknown City Time"
             }
         }
     },
@@ -79,7 +79,7 @@
         },
         "output": {
             "values": {
-                "en": "Tuesday, January 21, 2020, 08:25:07 {z}"
+                "en": "Tuesday, January 21, 2020, 08:25:07 GMT+5"
             }
         }
     },
@@ -107,7 +107,7 @@
         },
         "output": {
             "values": {
-                "en": "Tuesday, January 21, 2020, 08:25:07 {z}"
+                "en": "Tuesday, January 21, 2020, 08:25:07 GMT+5"
             }
         }
     },

components/datetime/tests/patterns/tests/time_zones.json

@@ -986,13 +986,7 @@
         "patterns": [
           "z",
           "zz",
-          "zzz"
-        ],
-        "configs": [],
-        "expected": ["{z}"]
-      },
-      {
-        "patterns": [
+          "zzz",
           "O"
         ],
         "configs": [],
@@ -1001,6 +995,7 @@
       {
         "patterns": [
           "OOOO",
+          "zzzz",
           "ZZZZ"
         ],
         "configs": [],
@@ -1042,13 +1037,6 @@
           "z",
           "zz",
           "zzz",
-          "zzzz"
-        ],
-        "configs": [],
-        "expected": ["{z}"]
-      },
-      {
-        "patterns": [
           "O"
         ],
         "configs": [],
@@ -1057,6 +1045,7 @@
       {
         "patterns": [
           "ZZZZ",
+          "zzzz",
           "OOOO"
         ],
         "configs": [],
@@ -1081,13 +1070,7 @@
       {
         "patterns": [
           "v",
-          "vvvv"
-        ],
-        "configs": [],
-        "expected": ["{v}"]
-      },
-      {
-        "patterns": [
+          "vvvv",
           "VVVV"
         ],
         "configs": [],

components/timezone/src/ixdtf.rs

@@ -116,8 +116,8 @@ impl TimeZoneInfo {
         Ok(Self {
             time_zone_id: crate::TimeZoneBcp47Id::unknown(),
             offset: Some(UtcOffset::try_from_utc_offset_record(record)?),
-            zone_variant: None,
-            local_time: None,
+            zone_variant: Some(ZoneVariant::standard()),
+            local_time: Some((Date::unix_epoch(), Time::midnight())),
         })
     }
 
@@ -144,17 +144,22 @@ impl TimeZoneInfo {
                         time.second,
                     )?;
                     if let Some(offset) = offset {
-                        if let Some((std_offset, dst_offset)) = ZoneOffsetCalculator::new()
-                            .compute_offsets_from_time_zone(time_zone_id, &iso)
-                        {
-                            zone_variant = if offset == std_offset {
-                                Some(ZoneVariant::standard())
-                            } else if Some(offset) == dst_offset {
-                                Some(ZoneVariant::daylight())
+                        zone_variant = Some(
+                            if let Some((std_offset, dst_offset)) = ZoneOffsetCalculator::new()
+                                .compute_offsets_from_time_zone(time_zone_id, &iso)
+                            {
+                                if offset == std_offset {
+                                    ZoneVariant::standard()
+                                } else if Some(offset) == dst_offset {
+                                    ZoneVariant::daylight()
+                                } else {
+                                    return Err(ParseError::InvalidOffsetError);
+                                }
                             } else {
-                                return Err(ParseError::InvalidOffsetError);
-                            };
-                        }
+                                debug_assert_eq!(time_zone_id.0.as_str(), "unk");
+                                ZoneVariant::standard()
+                            },
+                        );
                     }
                     local_time = Some((iso.date, iso.time));
                 };