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importScripts("/resources/testharness.js");
importScripts('resources/sync-access-handle-test.js');
'use strict';
sync_access_handle_test((t, handle) => {
// Without this assertion, the test passes even if truncate is not defined.
assert_implements(handle.truncate,
"SyncAccessHandle.truncate is not implemented.");
handle.truncate(4);
assert_equals(handle.getSize(), 4);
handle.truncate(2);
assert_equals(handle.getSize(), 2);
handle.truncate(7);
assert_equals(handle.getSize(), 7);
handle.truncate(0);
assert_equals(handle.getSize(), 0);
assert_throws_js(TypeError, () => handle.truncate(-4));
}, 'test SyncAccessHandle.truncate with different sizes');
sync_access_handle_test((t, handle) => {
const writeBuffer = new Uint8Array(4);
writeBuffer.set([96, 97, 98, 99]);
handle.write(writeBuffer, {at: 0});
handle.truncate(2);
let readBuffer = new Uint8Array(6);
assert_equals(2, handle.read(readBuffer, {at: 0}));
let expected = new Uint8Array(6);
expected.set([96, 97, 0, 0, 0, 0]);
assert_array_equals(expected, readBuffer);
// Resize the file to 6, expect that everything beyond the old size is '0'.
handle.truncate(6);
assert_equals(6, handle.read(readBuffer, {at: 0}));
assert_array_equals(expected, readBuffer);
}, 'test SyncAccessHandle.truncate after SyncAccessHandle.write');
done();
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