diff options
Diffstat (limited to 'testing/web-platform/tests/fs/resources/message-target.js')
| -rw-r--r-- | testing/web-platform/tests/fs/resources/message-target.js | 158 |
1 files changed, 158 insertions, 0 deletions
diff --git a/testing/web-platform/tests/fs/resources/message-target.js b/testing/web-platform/tests/fs/resources/message-target.js new file mode 100644 index 0000000000..7c29afb799 --- /dev/null +++ b/testing/web-platform/tests/fs/resources/message-target.js @@ -0,0 +1,158 @@ +'use strict'; + +// This script depends on the following scripts: +// /fs/resources/messaging-helpers.js +// /fs/resources/test-helpers.js + +// add_message_event_handlers() is the helper function used to setup all +// message targets, including iframes and workers. +// +// Adds a message event handler and a message error handler to |receiver|. +// The 'data' property from received MessageEvents must include a 'type' +// property. The 'type' selects the test logic to run. Most message type +// handlers use postMessage() to respond to the sender with test results. +// The sender then validates the test results after receiving the response. +// +// Both |target| and |target_origin| are optional. |target| is used +// to send message responses back to the sender. When omitted, the +// 'source' from received MessageEvents is used instead. +// +// For window messaging, |target_origin| specifies the origin to receive +// responses. Most window tests use '*' for the |target_origin|. Worker +// and message port tests must use undefined for |target_origin| to avoid +// exceptions. +function add_message_event_handlers(receiver, target, target_origin) { + receiver.addEventListener('message', async function (message_event) { + const message_data = message_event.data; + + // Reply to the sender using the 'source' from the received MessageEvent. + let message_source = message_event.source; + if (message_source === null) { + // However, some message senders, like DedicatedWorkers, don't include + // a source. Fallback to the target when the source is null. + message_source = target; + } + + try { + switch (message_data.type) { + case 'receive-message-port': + // Receive a MessagePort to use as a message target for testing. + add_message_event_handlers( + /*receiver=*/message_data.message_port, + /*target=*/message_data.message_port); + message_data.message_port.start(); + break; + + case 'create-broadcast-channel': + // Create a BroadcastChannel to use as a message target for testing. + const broadcast_channel = + new BroadcastChannel(message_data.broadcast_channel_name); + add_message_event_handlers( + /*receiver=*/broadcast_channel, + /*target=*/broadcast_channel); + message_source.postMessage( + { type: 'broadcast-channel-created' }, + { targetOrigin: target_origin }); + break; + + case 'receive-file-system-handles': + // Receive a list of cloned FileSystemFileHandles. Access the + // properties of each FileSystemFileHandle by serializing the + // handle to a JavaScript object. Then respond with the serialized + // results, enabling the sender to verify that the cloned handle + // produced the expected property values from this execution context. + const serialized_handles = []; + const cloned_handles = message_data.cloned_handles; + for (let i = 0; i < cloned_handles.length; ++i) { + const serialized = await serialize_handle(cloned_handles[i]); + serialized_handles.push(serialized); + } + message_source.postMessage({ + type: 'receive-serialized-file-system-handles', + serialized_handles, + // Respond with the cloned handles to create new clones for + // the sender to verify. + cloned_handles, + }, { targetOrigin: target_origin }); + break; + + case 'receive-serialized-file-system-handles': + // Do nothing. This message is meant for test runner validation. + // Other message targets may receive this message while testing + // broadcast channels. + break; + + case 'create-file': + // Create a new file and then respond to the sender with it. + const directory = await navigator.storage.getDirectory(); + const file_handle = + await directory.getFileHandle('temp-file', { create: true }); + message_source.postMessage( + { type: 'receive-file', file_handle }, + { targetOrigin: target_origin }); + break; + + case 'create-directory': + // Create a new directory and then respond to the sender with it. + const parent_directory = await navigator.storage.getDirectory(); + const directory_handle = + await parent_directory.getDirectoryHandle('temp-directory', + { create: true }); + message_source.postMessage( + { type: 'receive-directory', directory_handle }, + { targetOrigin: target_origin }); + break; + + case 'create-sync-access-handle': + // Receive a file and create a sync access handle out of it. Report + // success to the sender. + let success = true; + try { + const access_handle = await message_data.file_handle + .createSyncAccessHandle({mode: "in-place"}); + access_handle.close(); + } catch (error) { + success = false; + } + + message_source.postMessage( + { type: 'receive-sync-access-handle-result', success }, + { targetOrigin: target_origin }); + break; + + default: + throw `Unknown message type: '${message_data.type}'`; + } + } catch (error) { + // Respond with an error to trigger a failure in the sender's + // test runner. + message_source.postMessage(`ERROR: ${error}`, + { targetOrigin: target_origin }); + } + }); + + receiver.addEventListener('messageerror', async function (message_event) { + // Select the target for message responses (see comment in 'message' event + // listener above). + let message_source = message_event.source; + if (message_source === null) { + message_source = target; + } + + try { + // Respond with the MessageEvent's property values, enabling the sender + // to verify results. + const serialized_message_error_event = + serialize_message_error_event(message_event); + message_source.postMessage({ + type: 'serialized-message-error', + serialized_message_error_event + }, { targetOrigin: target_origin }); + } catch (error) { + // Respond with an error to trigger a failure in the sender's + // test runner. + message_source.postMessage(`ERROR: ${error}`, + { targetOrigin: target_origin }); + } + }); +} |