Added: trunk/LayoutTests/streams/reference-implementation/writable-stream.html (0 => 189686)
--- trunk/LayoutTests/streams/reference-implementation/writable-stream.html (rev 0)
+++ trunk/LayoutTests/streams/reference-implementation/writable-stream.html 2015-09-14 07:53:04 UTC (rev 189686)
@@ -0,0 +1,254 @@
+<!DOCTYPE html>
+<script src=''></script>
+<script src=''></script>
+<script src=''></script>
+<script>
+function writeArrayToStream(array, writableStream) {
+ array.forEach(function(chunk) { writableStream.write(chunk); })
+ return writableStream.close();
+}
+
+var test1 = async_test('error argument is given to start method');
+test1.step(function() {
+ var error;
+ var ws = new WritableStream({
+ start: function(error_) {
+ error = error_;
+ }
+ });
+
+ // Now error the stream after its construction.
+ var passedError = new Error('horrible things');
+ error(passedError);
+ assert_equals(ws.state, 'errored');
+ ws.closed.catch(test1.step_func(function(r) {
+ assert_equals(r, passedError);
+ test1.done();
+ }));
+});
+
+var test2 = async_test('Underlying sink\'s write won\'t be called until start finishes');
+test2.step(function() {
+ var expectWriteCall = false;
+
+ var resolveStartPromise;
+ var ws = new WritableStream({
+ start: function() {
+ return new Promise(test2.step_func(function(resolve) { resolveStartPromise = resolve; }));
+ },
+ write: function(chunk) {
+ if (expectWriteCall) {
+ assert_equals(chunk, 'a');
+ test2.done();
+ } else {
+ assert_unreached('Unexpected write call');
+ }
+ },
+ close: function() {
+ assert_unreached('Unexpected close call');
+ }
+ });
+
+ ws.write('a');
+ assert_equals(ws.state, 'waiting', 'writable stream should be waiting, not ' + ws.state);
+
+ // Wait and see that write won't be called.
+ setTimeout(test2.step_func(function() {
+ expectWriteCall = true;
+ resolveStartPromise();
+ }), 200);
+});
+
+var test3 = async_test('Underlying sink\'s close won\'t be called until start finishes');
+test3.step(function() {
+ var expectCloseCall = false;
+
+ var resolveStartPromise;
+ var ws = new WritableStream({
+ start: function() {
+ return new Promise(test3.step_func(function(resolve, reject) { resolveStartPromise = resolve; }));
+ },
+ write: function(chunk) {
+ assert_unreached('Unexpected write call');
+ },
+ close: function() {
+ if (expectCloseCall) {
+ test3.done();
+ } else {
+ assert_unreached('Unexpected close call');
+ }
+ }
+ });
+ ws.close('a');
+ assert_equals(ws.state, 'closing');
+
+ // Wait and see that write won't be called.
+ setTimeout(test3.step_func(function() {
+ expectCloseCall = true;
+ resolveStartPromise();
+ }), 200);
+});
+
+var test4 = async_test('Fulfillment value of ws.close() call must be undefined even if the underlying sink returns a non-undefined value');
+test4.step(function() {
+ var ws = new WritableStream({
+ close: function() {
+ return 'Hello';
+ }
+ });
+
+ var closePromise = ws.close('a');
+ closePromise.then(test4.step_func(function(value) {
+ assert_equals(value, undefined, 'fulfillment value must be undefined');
+ test4.done();
+ })).catch(test4.step_func(function() {
+ assert_unreached('closePromise is rejected');
+ }));
+});
+
+var test5 = async_test('Underlying sink\'s write or close are never invoked if start throws');
+test5.step(function() {
+ var passedError = new Error('horrible things');
+
+ try {
+ var ws = new WritableStream({
+ start: function() {
+ throw passedError;
+ },
+ write: function(chunk) {
+ assert_unreached('Unexpected write call');
+ },
+ close: function() {
+ assert_unreached('Unexpected close call');
+ }
+ });
+ } catch (e) {
+ assert_equals(e, passedError);
+ test5.done();
+ }
+ assert_unreached('Constructor didn\'t throw');
+});
+
+var test6 = async_test('Underlying sink\'s write or close are never invoked if the promise returned by start is rejected');
+test6.step(function() {
+ var ws = new WritableStream({
+ start: function() {
+ return Promise.reject();
+ },
+ write: function(chunk) {
+ assert_unreached('Unexpected write call');
+ },
+ close: function() {
+ assert_unreached('Unexpected close call');
+ }
+ });
+
+ // Wait and see that write or close won't be called.
+ setTimeout(test6.step_func(function() {
+ test6.done();
+ }), 500);
+});
+
+test(function() {
+ new WritableStream() // WritableStream constructed with no errors.
+}, 'WritableStream can be constructed with no arguments');
+
+test(function() {
+ var ws = new WritableStream();
+
+ assert_equals(typeof ws.write, 'function', 'has a write method');
+ assert_equals(typeof ws.abort, 'function', 'has an abort method');
+ assert_equals(typeof ws.close, 'function', 'has a close method');
+
+ assert_equals(ws.state, 'writable', 'state starts out writable');
+
+ assert_true('ready' in ws, 'has a ready property');
+ assert_true('then' in ws.ready, 'ready property is a thenable');
+ assert_true('closed' in ws, 'has a closed property');
+ assert_true('then' in ws.closed, 'closed property is thenable');
+}, 'WritableStream instances have the correct methods and properties');
+
+var test7 = async_test('WritableStream with simple input, processed asynchronously');
+test7.step(function() {
+ var storage;
+ var ws = new WritableStream({
+ start: function() {
+ storage = [];
+ },
+
+ write: function(chunk) {
+ return new Promise(test7.step_func(function(resolve) {
+ setTimeout(test7.step_func(function() {
+ storage.push(chunk);
+ resolve();
+ }), 0);
+ }));
+ },
+
+ close: function() {
+ return new Promise(test7.step_func(function(resolve) { setTimeout(test7.step_func(resolve), 0); }));
+ }
+ });
+
+ var input = [1, 2, 3, 4, 5];
+ writeArrayToStream(input, ws).then(
+ test7.step_func(function() {
+ assert_array_equals(storage, input, 'correct data was relayed to underlying sink');
+ test7.done();
+ }),
+ test7.step_func(function(r) { assert_unreached(r); })
+ );
+});
+
+var test8 = async_test('WritableStream with simple input, processed synchronously');
+test8.step(function() {
+ var storage;
+ var ws = new WritableStream({
+ start: function() {
+ storage = [];
+ },
+
+ write: function(chunk) {
+ storage.push(chunk);
+ },
+ });
+
+ var input = [1, 2, 3, 4, 5];
+ writeArrayToStream(input, ws).then(
+ test8.step_func(function() {
+ assert_array_equals(storage, input, 'correct data was relayed to underlying sink');
+ test8.done();
+ }),
+ test8.step_func(function(r) { assert_unreached(r); })
+ );
+});
+
+var test9 = async_test('WritableStream is writable and ready fulfills immediately if the strategy does not apply backpressure');
+test9.step(function() {
+ var ws = new WritableStream({}, {
+ highWaterMark: Infinity,
+ size() { return 0; }
+ });
+
+ assert_equals(ws.state, 'writable');
+
+ ws.ready.then(test9.step_func(function() {
+ test9.done('ready promise was fulfilled');
+ }));
+});
+
+var test10 = async_test('Fulfillment value of ws.write() call must be undefined even if the underlying sink returns a non-undefined ovalue');
+test10.step(function() {
+ var ws = new WritableStream({
+ write: function() {
+ return 'Hello';
+ }
+ });
+
+ var writePromise = ws.write('a');
+ writePromise.then(test10.step_func(function(value) {
+ assert_equals(value, undefined, 'fulfillment value must be undefined');
+ test10.done();
+ })).catch(test10.step_func(function() { assert_unreached('writePromise is rejected'); }));
+});
+</script>
