Add more tests for #203

photostructure · Sep 22, 2024 · a012098 · a012098
1 parent d5d27ae
commit a012098
Show file tree

Hide file tree

Showing 2 changed files with 7 additions and 0 deletions.
diff --git a/src/Timezones.spec.ts b/src/Timezones.spec.ts
@@ -48,6 +48,7 @@ describe("Timezones", () => {
         })
       }
     })
+
     describe("accepts valid inputs", () => {
       const ts = new Date("2023-01-01T01:00:00").getTime()
       for (const ea of [
@@ -128,6 +129,7 @@ describe("Timezones", () => {
   describe("extractTzOffsetFromTags", () => {
     describe("with TimeZone", () => {
       for (const { tzo, exp } of [
+        { tzo: "+00:00", exp: "UTC" },
         { tzo: "-9", exp: "UTC-9" },
         { tzo: "-09:00", exp: "UTC-9" },
         { tzo: "+5:30", exp: "UTC+5:30" },

diff --git a/src/Timezones.ts b/src/Timezones.ts
@@ -162,6 +162,11 @@ export function normalizeZone(
     if (input instanceof Zone) {
       return isZoneValid(input) ? input : undefined
     }
+
+    // This test and short-circuit may not be necessary, but it's cheap and
+    // explicit:
+    if (isUTC(input)) return FixedOffsetZone.utcInstance
+
     let z = input
     if (typeof z === "string") {
       z = z.replace(/^(?:Zulu|Z|GMT)(?:\b|$)/, "UTC")