michael@0: "use strict";
michael@0: 
michael@0: Components.utils.import("resource://gre/modules/osfile.jsm");
michael@0: Components.utils.import("resource://gre/modules/Task.jsm");
michael@0: 
michael@0: function run_test() {
michael@0:   do_test_pending();
michael@0:   run_next_test();
michael@0: }
michael@0: 
michael@0: /**
michael@0:  * Test to ensure that {bytes:} in options to |readTo| and |write| are correctly
michael@0:  * preserved.
michael@0:  */
michael@0: add_task(function* test_bytes() {
michael@0:   let path = OS.Path.join(OS.Constants.Path.tmpDir,
michael@0:                           "test_osfile_async_bytes.tmp");
michael@0:   let file = yield OS.File.open(path, {trunc: true, read: true, write: true});
michael@0:   try {
michael@0:     try {
michael@0:       // 1. Test write, by supplying {bytes:} options smaller than the actual
michael@0:       // buffer.
michael@0:       yield file.write(new Uint8Array(2048), {bytes: 1024});
michael@0:       do_check_eq((yield file.stat()).size, 1024);
michael@0: 
michael@0:       // 2. Test same for |readTo|.
michael@0:       yield file.setPosition(0, OS.File.POS_START);
michael@0:       let read = yield file.readTo(new Uint8Array(1024), {bytes: 512});
michael@0:       do_check_eq(read, 512);
michael@0: 
michael@0:       // 3. Test that passing nullish values for |options| still works.
michael@0:       yield file.setPosition(0, OS.File.POS_END);
michael@0:       yield file.write(new Uint8Array(1024), null);
michael@0:       yield file.write(new Uint8Array(1024), undefined);
michael@0:       do_check_eq((yield file.stat()).size, 3072);
michael@0:     } finally {
michael@0:       yield file.close();
michael@0:     }
michael@0:   } finally {
michael@0:     yield OS.File.remove(path);
michael@0:   }
michael@0: });
michael@0: 
michael@0: add_task(do_test_finished);