Enhance parseDate function to handle time input correctly and update related tests for improved UTC support

Author: ogroppo

src/helpers/parseDate.test.ts

@@ -93,9 +93,7 @@ describe("parseDate", () => {
         new Date("2000-02-21T00:00:00.000Z")
       );
     });
-
-    // TODO!!!! time still not working with asUTC: true
-    test.skip("time", async () => {
+    test("time", async () => {
       expect(parseDate("2000-02-02T40:00:00")).toBeUndefined();
 
       expect(parseDate("2000-02-21T01", { asUTC: true })).toStrictEqual(
@@ -106,8 +104,8 @@ describe("parseDate", () => {
         new Date("2000-02-21T00:01:00.000Z")
       );
 
-      expect(parseDate("2000-02-21T00:00:00", { asUTC: true })).toStrictEqual(
-        new Date("2000-02-21T00:00:00.000Z")
+      expect(parseDate("2000-02-21T00:00:01", { asUTC: true })).toStrictEqual(
+        new Date("2000-02-21T00:00:01.000Z")
       );
     });
   });

src/helpers/parseDate.ts

@@ -32,13 +32,21 @@ export const parseDate = (
     if (!Number.isFinite(arg)) return;
   }
 
-  if (isString(arg) && partialDateRegex.test(arg)) {
-    // Add time to date string because it will be interpreted
-    // as UTC date instead of local time, and there is no
-    // circumstance where UTC as default is desired.
-    arg = `${
-      arg + "-01-01".slice(arg.length - 4) // fill missing month and day if needed
-    }T00:00:00`;
+  if (isString(arg)) {
+    if (partialDateRegex.test(arg)) {
+      // Add time to date string because it will be interpreted
+      // as UTC date instead of local time, and there is no
+      // circumstance where UTC as default is desired.
+      arg = `${
+        arg + "-01-01".slice(arg.length - 4) // fill missing month and day if needed
+      }T00:00:00`;
+    }
+
+    const [date, time] = arg.split("T");
+    // 8 as in "HH:MM:SS"
+    if (time.length < 8) {
+      arg = `${date}T${time}${"00:00:00".slice(time.length)}`;
+    }
 
     if (options?.asUTC) {
       arg += "Z"; // In this case, force UTC

src/validators/isPastDate.test.ts

@@ -26,10 +26,10 @@ describe("isPastDate", () => {
     });
 
     it("should return false when date is after or equal to referenceDate", () => {
-      const referenceDate = new Date("2023-01-01");
-      expect(isPastDate("2023-06-01", { referenceDate })).toBe(false);
-      expect(isPastDate("2024-01-01", { referenceDate })).toBe(false);
-      expect(isPastDate("2023-01-01", { referenceDate })).toBe(false); // same date
+      const referenceDate = new Date("2023-01-01T00:00:00Z");
+      expect(isPastDate("2023-06-01T00:00:00Z", { referenceDate })).toBe(false);
+      expect(isPastDate("2024-01-01T00:00:00Z", { referenceDate })).toBe(false);
+      expect(isPastDate("2023-01-01T00:00:00Z", { referenceDate })).toBe(false); // same date
     });
 
     it("should work with different date formats as referenceDate", () => {