Updated validation method and related test cases

src/tools/epoch-converter/__test/epoch-converter.e2e.spec.ts

@@ -17,7 +17,6 @@ test.describe('Tool - Epoch converter', () => {
     const localLine = page.locator('text=Local Time:');
 
     await expect(utcLine).toContainText('GMT (UTC): Fri, 20 Jun 2025 20:48:00 GMT');
-    // await expect(localLine).toContainText('Local Time: Fri, Jun 20, 2025, 22:48:00 GMT+2');
     await expect(localLine).toContainText('Local Time:');
     await expect(localLine).toContainText('Jun 20, 2025');
     await expect(localLine).toContainText('22:48:00');
@@ -34,24 +33,24 @@ test.describe('Tool - Epoch converter', () => {
 
     await page.getByRole('button', { name: 'Convert to Epoch (Local)' }).click();
 
-    await expect(page.getByText('1750420080')).toBeVisible({ timeout: 50000 });
+    await expect(page.getByText('1750420080')).toBeVisible({ timeout: 5000 });
 
     await page.getByRole('button', { name: 'Convert to Epoch (UTC)' }).click();
 
-    await expect(page.getByText('1750427280')).toBeVisible({ timeout: 50000 });
+    await expect(page.getByText('1750427280')).toBeVisible({ timeout: 5000 });
   });
 
   test('Shows error if year is not 4 digits', async ({ page }) => {
     await page.getByPlaceholder('YYYY').fill('99');
     await page.getByRole('button', { name: 'Convert to Epoch (Local)' }).click();
-    await expect(page.getByText('Year must be 4 digits')).toBeVisible({ timeout: 50000 });
+    await expect(page.getByText('Year must be 4 digits')).toBeVisible({ timeout: 5000 });
   });
 
   test('Shows error if month is invalid', async ({ page }) => {
     await page.getByPlaceholder('YYYY').fill('1999');
     await page.getByPlaceholder('MM').first().fill('00');
     await page.getByRole('button', { name: 'Convert to Epoch (Local)' }).click();
-    await expect(page.getByText('Month must be between 1 and 12')).toBeVisible({ timeout: 50000 });
+    await expect(page.getByText('Month must be between 1 and 12')).toBeVisible({ timeout: 5000 });
   });
 
   test('Shows error if day is invalid', async ({ page }) => {
@@ -59,7 +58,7 @@ test.describe('Tool - Epoch converter', () => {
     await page.getByPlaceholder('MM').first().fill('01');
     await page.getByPlaceholder('DD').fill('0');
     await page.getByRole('button', { name: 'Convert to Epoch (UTC)' }).click();
-    await expect(page.getByText('Day must be between 1 and 31')).toBeVisible({ timeout: 50000 });
+    await expect(page.getByText('Day must be between 1 and 31')).toBeVisible({ timeout: 5000 });
   });
 
   test('Shows error if hour is invalid', async ({ page }) => {
@@ -68,7 +67,7 @@ test.describe('Tool - Epoch converter', () => {
     await page.getByPlaceholder('DD').fill('1');
     await page.getByPlaceholder('HH').fill('24');
     await page.getByRole('button', { name: 'Convert to Epoch (Local)' }).click();
-    await expect(page.getByText('Hour must be between 0 and 23')).toBeVisible({ timeout: 50000 });
+    await expect(page.getByText('Hour must be between 0 and 23')).toBeVisible({ timeout: 5000 });
   });
 
   test('Shows error if minute is invalid', async ({ page }) => {
@@ -78,7 +77,7 @@ test.describe('Tool - Epoch converter', () => {
     await page.getByPlaceholder('HH').fill('23');
     await page.getByPlaceholder('MM').nth(1).fill('60');
     await page.getByRole('button', { name: 'Convert to Epoch (UTC)' }).click();
-    await expect(page.getByText('Minute must be between 0 and 59')).toBeVisible({ timeout: 50000 });
+    await expect(page.getByText('Minute must be between 0 and 59')).toBeVisible({ timeout: 5000 });
   });
 
   test('Shows error if second is invalid', async ({ page }) => {
@@ -89,6 +88,45 @@ test.describe('Tool - Epoch converter', () => {
     await page.getByPlaceholder('MM').nth(1).fill('59');
     await page.getByPlaceholder('SS').fill('99');
     await page.getByRole('button', { name: 'Convert to Epoch (UTC)' }).click();
-    await expect(page.getByText('Second must be between 0 and 59')).toBeVisible({ timeout: 50000 });
+    await expect(page.getByText('Second must be between 0 and 59')).toBeVisible({ timeout: 5000 });
+  });
+
+  test('Shows error for invalid combination like February 31', async ({ page }) => {
+    await page.getByPlaceholder('YYYY').fill('2024');
+    await page.getByPlaceholder('MM').first().fill('02');
+    await page.getByPlaceholder('DD').fill('31');
+    await page.getByPlaceholder('HH').fill('12');
+    await page.getByPlaceholder('MM').nth(1).fill('00');
+    await page.getByPlaceholder('SS').fill('00');
+    await page.getByRole('button', { name: 'Convert to Epoch (Local)' }).click();
+
+    await expect(page.getByText('Invalid date string')).toBeVisible({ timeout: 30000 });
+  });
+
+  test('Shows error for invalid date like April 31', async ({ page }) => {
+    await page.getByPlaceholder('YYYY').fill('2024');
+    await page.getByPlaceholder('MM').first().fill('04');
+    await page.getByPlaceholder('DD').fill('31');
+    await page.getByPlaceholder('HH').fill('12');
+    await page.getByPlaceholder('MM').nth(1).fill('00');
+    await page.getByPlaceholder('SS').fill('00');
+    await page.getByRole('button', { name: 'Convert to Epoch (UTC)' }).click();
+    await expect(page.locator('.c-alert--icon')).toBeVisible({ timeout: 60000 });
+
+    await expect(page.getByText('Invalid date string')).toBeVisible({ timeout: 60000 });
+  });
+
+  test('Allows valid leap year date: February 29, 2024', async ({ page }) => {
+    await page.getByPlaceholder('YYYY').fill('2024');
+    await page.getByPlaceholder('MM').first().fill('02');
+    await page.getByPlaceholder('DD').fill('29');
+    await page.getByPlaceholder('HH').fill('12');
+    await page.getByPlaceholder('MM').nth(1).fill('00');
+    await page.getByPlaceholder('SS').fill('00');
+
+    await page.getByRole('button', { name: 'Convert to Epoch (UTC)' }).click();
+
+    // Should not show any error alert
+    await expect(page.locator('.c-alert')).not.toBeVisible();
   });
 });

src/tools/epoch-converter/epoch-converter.service.ts

@@ -81,23 +81,8 @@ export function dateToEpoch(
   if (parseAsUTC && !dateString.endsWith('Z')) {
     normalizedDateString = `${dateString}Z`;
   }
-  // eslint-disable-next-line no-console
-  console.log(`test = ${normalizedDateString}`);
-  // else {
-  //   // Manually compute local timezone offset and append it
-  //   const tempDate = new Date(`${dateString}`);
-  //   const offsetMinutes = tempDate.getTimezoneOffset();
-  //   const sign = offsetMinutes <= 0 ? '+' : '-';
-  //   const absOffset = Math.abs(offsetMinutes);
-  //   const hours = String(Math.floor(absOffset / 60)).padStart(2, '0');
-  //   const minutes = String(absOffset % 60).padStart(2, '0');
-  //   const offset = `${sign}${hours}:${minutes}`;
-  //   normalizedDateString = `${dateString}${offset}`;
-  // }
 
   const date = new Date(normalizedDateString);
-  // eslint-disable-next-line no-console
-  console.log(date);
   if (Number.isNaN(date.getTime())) {
     throw new TypeError('Invalid date string');
   }

src/tools/epoch-converter/epoch-converter.vue

@@ -87,6 +87,17 @@ function validateDateParts(parts: DateParts): void {
   if (+second < 0 || +second > 59) {
     throw new Error('Second must be between 0 and 59');
   }
+
+  // Cross-check full date validity
+  const y = +year;
+  const m = +month - 1;
+  const d = +day;
+
+  const constructed = new Date(y, m, d);
+
+  if (constructed.getUTCFullYear() !== y || constructed.getUTCMonth() !== m || constructed.getUTCDate() !== m) {
+    throw new TypeError('Invalid date string');
+  }
 }
 
 // Clear errors on input
@@ -183,7 +194,7 @@ watch(dateParts, () => {
       </div>
     </div>
 
-    <c-alert v-if="dateInputError" type="error" class="mb-4 mt-4">
+    <c-alert v-if="dateInputError" type="error" class="validateError mb-4 mt-4">
       {{ dateInputError }}
     </c-alert>
   </c-card>