feat(pdf): add bulk PDF operations (watermark/compress/rotate/etc.) to batch converter

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2026-08-23 19:31:33 +05:30
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/**
* Tests for the PDF batch operations dialog (Task 22). Exercises the real
* dialog DOM in jsdom with the electron IPC surface mocked, following the
* jest.mock('electron') pattern in document-compare-dialog.test.js.
*
* These jsdom tests plus tests/main/PDFBatchOperations.test.js substitute for
* the brief's manual GUI verification step (batch-watermarking a folder of
* PDFs), which is not possible in this sandbox.
*/
jest.mock('electron', () => ({
ipcRenderer: {
invoke: jest.fn(),
send: jest.fn(),
on: jest.fn(),
once: jest.fn(),
removeAllListeners: jest.fn(),
},
}));
require('../src/utils/ModalManager'); // sets window.ModalManager for the dialog
const { ipcRenderer } = require('electron');
const { showPdfBatchDialog } = require('../src/renderer/pdf-batch-dialog');
// Captures the listeners the dialog registers (folder-selected, batch-progress,
// pdf-batch-complete) so tests can fire them like the main process would.
const listeners = {};
ipcRenderer.on.mockImplementation((channel, callback) => {
listeners[channel] = callback;
return () => delete listeners[channel];
});
const EXPECTED_OPERATIONS = [
'watermark',
'split',
'compress',
'rotate',
'delete',
'extractText',
'pageNumbers',
'crop',
'extractImages',
];
function openDialog(onConvertFormat = jest.fn()) {
showPdfBatchDialog({ onConvertFormat });
return onConvertFormat;
}
function selectBatchType(type) {
const select = document.getElementById('pdf-batch-type');
select.value = type;
select.dispatchEvent(new Event('change'));
}
function selectOperation(op) {
const select = document.getElementById('pdf-batch-operation');
select.value = op;
select.dispatchEvent(new Event('change'));
}
function setField(name, value) {
document.getElementById(`pdf-batch-field-${name}`).value = value;
}
// Conditional fields are hidden by toggling their wrapper section.
function fieldWrapperHidden(name) {
return document.getElementById(`pdf-batch-field-${name}-wrapper`).classList.contains('hidden');
}
function setFolders(input = '/batch/in', output = '/batch/out') {
setField('inputFolder', input);
setField('outputFolder', output);
}
function clickProcess() {
document.getElementById('pdf-batch-process').click();
}
function statusText() {
return document.getElementById('pdf-batch-status').textContent;
}
function lastSentPayload() {
const calls = ipcRenderer.send.mock.calls.filter((c) => c[0] === 'batch-pdf-operation');
return calls.length ? calls[calls.length - 1][1] : null;
}
describe('PDF batch operations dialog', () => {
beforeEach(() => {
ipcRenderer.send.mockReset();
ipcRenderer.invoke.mockReset();
});
describe('batch type selector', () => {
it('defaults to Convert Format and hides the bulk-operation controls', () => {
const onConvertFormat = openDialog();
expect(document.getElementById('pdf-batch-type').value).toBe('convert');
expect(
document.getElementById('pdf-batch-operation-panel').classList.contains('hidden')
).toBe(true);
expect(document.getElementById('pdf-batch-process').textContent).toContain('Batch Converter');
expect(document.getElementById('pdf-batch-operation').children.length).toBe(
EXPECTED_OPERATIONS.length
);
expect(onConvertFormat).not.toHaveBeenCalled();
});
it('delegates Convert Format to the existing batch converter without sending an operation', () => {
const onConvertFormat = openDialog();
clickProcess();
expect(onConvertFormat).toHaveBeenCalledTimes(1);
expect(ipcRenderer.send).not.toHaveBeenCalledWith('batch-pdf-operation', expect.anything());
});
it('shows the bulk-operation controls when Bulk PDF Operation is selected', () => {
openDialog();
selectBatchType('operation');
const opSelect = document.getElementById('pdf-batch-operation');
expect(
document.getElementById('pdf-batch-operation-panel').classList.contains('hidden')
).toBe(false);
expect(Array.from(opSelect.options).map((o) => o.value)).toEqual(EXPECTED_OPERATIONS);
expect(document.getElementById('pdf-batch-process').textContent).toBe('Process');
});
});
describe('bulk operation validation', () => {
it('warns when the input folder is missing and sends nothing', () => {
openDialog();
selectBatchType('operation');
setField('outputFolder', '/batch/out');
clickProcess();
expect(statusText()).toBe('Select an input folder.');
expect(lastSentPayload()).toBeNull();
});
it('warns when the output folder is missing and sends nothing', () => {
openDialog();
selectBatchType('operation');
setField('inputFolder', '/batch/in');
clickProcess();
expect(statusText()).toBe('Select an output folder.');
expect(lastSentPayload()).toBeNull();
});
});
describe('watermark operation', () => {
it('sends the batch-pdf-operation payload with the single-file dialog option shapes', () => {
openDialog();
selectBatchType('operation');
selectOperation('watermark');
setFolders();
setField('text', 'DRAFT');
clickProcess();
expect(lastSentPayload()).toEqual({
operation: 'watermark',
inputFolder: '/batch/in',
outputFolder: '/batch/out',
includeSubfolders: true,
data: {
text: 'DRAFT',
fontSize: 48,
opacity: 0.3,
position: 'center',
color: '#000000',
pages: 'all',
},
});
});
it('warns when the watermark text is empty', () => {
openDialog();
selectBatchType('operation');
selectOperation('watermark');
setFolders();
clickProcess();
expect(statusText()).toBe('Enter watermark text.');
expect(lastSentPayload()).toBeNull();
});
it('warns when the font size is cleared', () => {
openDialog();
selectBatchType('operation');
selectOperation('watermark');
setFolders();
setField('text', 'DRAFT');
setField('fontSize', '');
clickProcess();
expect(statusText()).toBe('Enter a font size.');
expect(lastSentPayload()).toBeNull();
});
it('shows the custom-pages field only for custom pages and sends customPages', () => {
openDialog();
selectBatchType('operation');
selectOperation('watermark');
setFolders();
setField('text', 'DRAFT');
expect(fieldWrapperHidden('customPages')).toBe(true);
setField('pages', 'custom');
document.getElementById('pdf-batch-field-pages').dispatchEvent(new Event('change'));
expect(fieldWrapperHidden('customPages')).toBe(false);
setField('customPages', '1-2');
clickProcess();
expect(lastSentPayload().data).toMatchObject({ pages: 'custom', customPages: '1-2' });
});
it('requires custom pages when Pages is set to custom', () => {
openDialog();
selectBatchType('operation');
selectOperation('watermark');
setFolders();
setField('text', 'DRAFT');
setField('pages', 'custom');
document.getElementById('pdf-batch-field-pages').dispatchEvent(new Event('change'));
clickProcess();
expect(statusText()).toBe('Enter the custom pages to watermark.');
expect(lastSentPayload()).toBeNull();
});
});
describe('split operation', () => {
it('shows page-range or interval fields per split mode and validates them', () => {
openDialog();
selectBatchType('operation');
selectOperation('split');
setFolders();
// Default mode "pages": ranges required, interval hidden.
expect(fieldWrapperHidden('interval')).toBe(true);
clickProcess();
expect(statusText()).toBe('Enter page ranges (e.g. 1-5, 6-10).');
expect(lastSentPayload()).toBeNull();
// Interval mode: interval required, ranges hidden.
setField('splitMode', 'interval');
document.getElementById('pdf-batch-field-splitMode').dispatchEvent(new Event('change'));
expect(fieldWrapperHidden('pageRanges')).toBe(true);
setField('interval', '');
clickProcess();
expect(statusText()).toBe('Enter the number of pages per split file.');
expect(lastSentPayload()).toBeNull();
// Valid interval payload.
setField('interval', '2');
clickProcess();
expect(lastSentPayload().data).toEqual({ splitMode: 'interval', interval: 2 });
});
it('sends pageRanges in pages mode', () => {
openDialog();
selectBatchType('operation');
selectOperation('split');
setFolders();
setField('pageRanges', '1-2, 3');
clickProcess();
expect(lastSentPayload().data).toEqual({ splitMode: 'pages', pageRanges: '1-2, 3' });
});
it('sends only the mode for size splits', () => {
openDialog();
selectBatchType('operation');
selectOperation('split');
setFolders();
setField('splitMode', 'size');
document.getElementById('pdf-batch-field-splitMode').dispatchEvent(new Event('change'));
clickProcess();
expect(lastSentPayload().data).toEqual({ splitMode: 'size' });
});
});
describe('other operations', () => {
it('sends delete pages', () => {
openDialog();
selectBatchType('operation');
selectOperation('delete');
setFolders();
setField('pages', '2');
clickProcess();
expect(lastSentPayload().data).toEqual({ pages: '2' });
});
it('warns when delete pages is empty', () => {
openDialog();
selectBatchType('operation');
selectOperation('delete');
setFolders();
clickProcess();
expect(statusText()).toBe('Enter the pages to delete (e.g. 1-3, 5).');
expect(lastSentPayload()).toBeNull();
});
it('sends rotate with angle and optional pages', () => {
openDialog();
selectBatchType('operation');
selectOperation('rotate');
setFolders();
setField('pages', '1');
clickProcess();
expect(lastSentPayload().data).toEqual({ angle: 90, pages: '1' });
});
it('sends page numbers options', () => {
openDialog();
selectBatchType('operation');
selectOperation('pageNumbers');
setFolders();
clickProcess();
expect(lastSentPayload().data).toEqual({ position: 'bottom-center', startNumber: 1 });
});
it('sends crop margins', () => {
openDialog();
selectBatchType('operation');
selectOperation('crop');
setFolders();
setField('margins.top', '10');
setField('margins.left', '5');
clickProcess();
expect(lastSentPayload().data).toEqual({
margins: { top: 10, bottom: 0, left: 5, right: 0 },
});
});
it('sends an empty data object for parameterless operations', () => {
openDialog();
selectBatchType('operation');
selectOperation('compress');
setFolders();
clickProcess();
expect(lastSentPayload()).toEqual({
operation: 'compress',
inputFolder: '/batch/in',
outputFolder: '/batch/out',
includeSubfolders: true,
data: {},
});
});
});
describe('progress and completion events', () => {
it('sends only one operation while a run is in flight', () => {
openDialog();
selectBatchType('operation');
selectOperation('compress');
setFolders();
clickProcess();
clickProcess(); // second click while the first run is still active
const calls = ipcRenderer.send.mock.calls.filter((c) => c[0] === 'batch-pdf-operation');
expect(calls).toHaveLength(1);
// After completion, a new run can be started.
listeners['pdf-batch-complete'](
{},
{ success: true, completed: 1, failed: 0, total: 1, outputFolder: '/batch/out' }
);
clickProcess();
expect(
ipcRenderer.send.mock.calls.filter((c) => c[0] === 'batch-pdf-operation')
).toHaveLength(2);
});
it('updates the progress bar from batch-progress events', () => {
openDialog();
selectBatchType('operation');
selectOperation('compress');
setFolders();
clickProcess();
listeners['batch-progress']({}, { completed: 1, failed: 0, total: 3, currentFile: 'a.pdf' });
const fill = document.getElementById('pdf-batch-progress-fill');
expect(fill.style.width).toBe('33%');
expect(document.getElementById('pdf-batch-progress-text').textContent).toContain('a.pdf');
expect(document.getElementById('pdf-batch-process').disabled).toBe(true);
});
it('re-enables Process and reports success on batch completion', () => {
openDialog();
selectBatchType('operation');
selectOperation('compress');
setFolders();
clickProcess();
listeners['pdf-batch-complete'](
{},
{ success: true, completed: 3, failed: 0, total: 3, outputFolder: '/batch/out' }
);
expect(statusText()).toContain('Batch complete: 3/3 file(s) processed');
expect(document.getElementById('pdf-batch-process').disabled).toBe(false);
expect(document.getElementById('pdf-batch-progress').classList.contains('hidden')).toBe(true);
});
it('reports failures in the completion status', () => {
openDialog();
selectBatchType('operation');
selectOperation('compress');
setFolders();
clickProcess();
listeners['pdf-batch-complete'](
{},
{ success: true, completed: 2, failed: 1, total: 3, outputFolder: '/batch/out' }
);
expect(statusText()).toContain('2/3 file(s) processed');
expect(statusText()).toContain('1 failed');
});
it('surfaces early errors (e.g. no matching files) as a warning', () => {
openDialog();
selectBatchType('operation');
selectOperation('compress');
setFolders();
clickProcess();
listeners['pdf-batch-complete'](
{},
{ success: false, error: 'No matching files found in the selected folder.' }
);
expect(statusText()).toBe('Error: No matching files found in the selected folder.');
expect(document.getElementById('pdf-batch-process').disabled).toBe(false);
});
it('ignores progress events while the dialog has no run in flight', () => {
openDialog();
selectBatchType('operation');
selectOperation('compress');
listeners['batch-progress']({}, { completed: 1, failed: 0, total: 3, currentFile: 'a.pdf' });
// Still the reset value — the event was ignored because no run is active.
expect(document.getElementById('pdf-batch-progress-fill').style.width).toBe('0%');
});
});
describe('folder picker replies', () => {
it('routes folder-selected events for its own pick types only', () => {
openDialog();
selectBatchType('operation');
selectOperation('watermark');
listeners['folder-selected']({}, { type: 'pdf-batch-input-dir', path: '/picked/in' });
listeners['folder-selected']({}, { type: 'pdf-batch-output-dir', path: '/picked/out' });
listeners['folder-selected']({}, { type: 'unrelated-type', path: '/elsewhere' });
expect(document.getElementById('pdf-batch-field-inputFolder').value).toBe('/picked/in');
expect(document.getElementById('pdf-batch-field-outputFolder').value).toBe('/picked/out');
});
});
});