115 lines
4.1 KiB
JavaScript
115 lines
4.1 KiB
JavaScript
'use strict';
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directory_test(async (t, root) => {
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const handle = await createEmptyFile('trunc_shrink', root);
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const stream = await handle.createWritable();
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await stream.write('1234567890');
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await stream.truncate(5);
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await stream.close();
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assert_equals(await getFileContents(handle), '12345');
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assert_equals(await getFileSize(handle), 5);
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}, 'truncate() to shrink a file');
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directory_test(async (t, root) => {
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const handle = await createEmptyFile('trunc_grow', root);
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const stream = await handle.createWritable();
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await stream.write('abc');
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await stream.truncate(5);
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await stream.close();
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assert_equals(await getFileContents(handle), 'abc\0\0');
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assert_equals(await getFileSize(handle), 5);
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}, 'truncate() to grow a file');
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directory_test(async (t, root) => {
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const dir = await createDirectory('parent_dir', root);
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const file_name = 'create_writable_fails_when_dir_removed.txt';
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const handle = await createEmptyFile(file_name, dir);
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await root.removeEntry('parent_dir', {recursive: true});
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await promise_rejects_dom(t, 'NotFoundError', cleanup_writable(t, handle.createWritable()));
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}, 'createWritable() fails when parent directory is removed');
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directory_test(async (t, root) => {
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const handle =
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await createFileWithContents('atomic_file_is_copied.txt', 'fooks', root);
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const stream = await handle.createWritable({keepExistingData: true});
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await stream.write('bar');
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await stream.close();
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assert_equals(await getFileContents(handle), 'barks');
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assert_equals(await getFileSize(handle), 5);
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}, 'createWritable({keepExistingData: true}): atomic writable file stream initialized with source contents');
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directory_test(async (t, root) => {
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const handle = await createFileWithContents(
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'atomic_file_is_not_copied.txt', 'very long string', root);
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const stream = await handle.createWritable({keepExistingData: false});
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await stream.write('bar');
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assert_equals(await getFileContents(handle), 'very long string');
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await stream.close();
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assert_equals(await getFileContents(handle), 'bar');
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assert_equals(await getFileSize(handle), 3);
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}, 'createWritable({keepExistingData: false}): atomic writable file stream initialized with empty file');
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directory_test(async (t, root) => {
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const dir = await createDirectory(t, 'parent_dir', root);
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const file_name = 'create_writable_twice.txt';
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const handle1 = await createEmptyFile(t, file_name, dir);
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const handle2 = await dir.getFileHandle(file_name, {create: false});
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const stream1 = await handle1.createWritable();
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const stream2 = await handle2.createWritable();
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}, 'createWritable() can be called on two handles representing the same file');
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directory_test(async (t, root) => {
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const handle = await createFileWithContents(
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'trunc_smaller_offset.txt', '1234567890', root);
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const stream = await handle.createWritable({keepExistingData: true});
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await stream.truncate(5);
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await stream.write('abc');
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await stream.close();
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assert_equals(await getFileContents(handle), 'abc45');
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assert_equals(await getFileSize(handle), 5);
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}, 'cursor position: truncate size > offset');
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directory_test(async (t, root) => {
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const handle = await createFileWithContents(
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'trunc_bigger_offset.txt', '1234567890', root);
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const stream = await handle.createWritable({keepExistingData: true});
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await stream.seek(6);
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await stream.truncate(5);
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await stream.write('abc');
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await stream.close();
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assert_equals(await getFileContents(handle), '12345abc');
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assert_equals(await getFileSize(handle), 8);
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}, 'cursor position: truncate size < offset');
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directory_test(async (t, root) => {
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const handle = await createEmptyFile('contents', root);
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const stream = await handle.createWritable();
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assert_false(stream.locked);
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stream.write('abc');
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assert_false(stream.locked);
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stream.write('def');
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assert_false(stream.locked);
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stream.truncate(9);
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assert_false(stream.locked);
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stream.seek(0);
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assert_false(stream.locked);
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stream.write('xyz');
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assert_false(stream.locked);
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await stream.close();
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assert_equals(await getFileContents(handle), 'xyzdef\0\0\0');
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assert_equals(await getFileSize(handle), 9);
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}, 'commands are queued, stream is unlocked after each operation');
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