[fields] Fix section pasting

packages/x-date-pickers/src/DateField/tests/editing.DateField.test.tsx

@@ -745,7 +745,7 @@ describe('<DateField /> - Editing', () => {
   );
 
   describeAdapters('Pasting', DateField, ({ adapter, render, renderWithProps, clickOnInput }) => {
-    const firePasteEvent = (input: HTMLInputElement, pastedValue: string) => {
+    const firePasteEvent = (input: HTMLInputElement, pastedValue?: string, rawValue?: string) => {
       act(() => {
         const clipboardEvent = new window.Event('paste', {
           bubbles: true,
@@ -755,14 +755,18 @@ describe('<DateField /> - Editing', () => {
 
         // @ts-ignore
         clipboardEvent.clipboardData = {
-          getData: () => pastedValue,
+          getData: () => pastedValue ?? rawValue ?? '',
         };
         // canContinue is `false` if default have been prevented
         const canContinue = input.dispatchEvent(clipboardEvent);
         if (!canContinue) {
           return;
         }
 
+        if (!pastedValue) {
+          return;
+        }
+
         const prevValue = input.value;
         const nextValue = `${prevValue.slice(
           0,
@@ -927,6 +931,24 @@ describe('<DateField /> - Editing', () => {
       fireEvent.change(input, { target: { value: '09/2/2022' } }); // Press 2
       expectInputValue(input, '09/02/2022'); // If internal state is not reset it would be 22 instead of 02
     });
+
+    it('should allow pasting a section', () => {
+      const { input, selectSection } = renderWithProps({
+        defaultValue: adapter.date('2018-12-05'),
+      });
+
+      selectSection('month');
+
+      fireEvent.change(input, { target: { value: '1/05/2018' } }); // initiate search query on month section
+      expectInputValue(input, '01/05/2018');
+
+      firePasteEvent(input, undefined, '05');
+      expectInputValue(input, '05/05/2018');
+
+      selectSection('month'); // move back to month section
+      fireEvent.change(input, { target: { value: '2/05/2018' } }); // check that the search query has been cleared after pasting
+      expectInputValue(input, '02/05/2018'); // If internal state is not reset it would be 12 instead of 02
+    });
   });
 
   describeAdapters(

packages/x-date-pickers/src/internals/hooks/useField/useField.ts

@@ -180,7 +180,14 @@ export const useField = <
         (activeSection.contentType === 'digit' && digitsOnly) ||
         (activeSection.contentType === 'digit-with-letter' && digitsAndLetterOnly);
       if (isValidPastedValue) {
-        // Early return to let the paste update section, value
+        resetCharacterQuery();
+        updateSectionValue({
+          activeSection,
+          newSectionValue: pastedValue,
+          shouldGoToNextSection: true,
+        });
+        // prevent default to avoid the input change handler being called
+        event.preventDefault();
         return;
       }
       if (lettersOnly || digitsOnly) {

test/e2e/index.test.ts

@@ -1,3 +1,4 @@
+import { platform } from 'node:os';
 import { expect } from 'chai';
 import {
   chromium,
@@ -547,10 +548,44 @@ async function initializeEnvironment(
           const input = page.getByRole('textbox');
 
           await input.focus();
-          await input.type('04/11/2022');
+          await input.fill('04/11/2022');
 
           expect(await input.inputValue()).to.equal('04/11/2022');
         });
+
+        it('should allow pasting a section', async () => {
+          // Only firefox is capable of reliably running this test in CI and headless browsers
+          if (browserType.name() !== 'firefox' && process.env.CIRCLECI) {
+            return;
+          }
+          await renderFixture('DatePicker/BasicDesktopDatePicker');
+          const input = page.getByRole('textbox');
+
+          const isMac = platform() === 'darwin';
+          const modifier = isMac ? 'Meta' : 'Control';
+
+          await input.focus();
+          // ensure that the focus is moved to the end section by typing naturally - with a timeout
+          await input.pressSequentially('04/11/2022');
+          // move to day section
+          await input.press('ArrowLeft');
+          // copy day section value
+          await input.press(`${modifier}+KeyC`);
+          // move to month section
+          await input.press('ArrowLeft');
+          // initiate search query on month section
+          await input.press('1');
+          // paste day section value to month section
+          await input.press(`${modifier}+KeyV`);
+
+          expect(await input.inputValue()).to.equal('11/11/2022');
+
+          // move back to month section
+          await input.press('ArrowLeft');
+          // check that the search query has been cleared after pasting
+          await input.press('2');
+          expect(await input.inputValue()).to.equal('02/11/2022');
+        });
       });
       describe('<MobileDatePicker />', () => {
         it('should allow selecting a value', async () => {