1 files changed, 155 insertions, 0 deletions
diff --git a/testing/web-platform/tests/streams/writable-streams/constructor.any.js b/testing/web-platform/tests/streams/writable-streams/constructor.any.js
new file mode 100644
index 0000000000..eaac90e48b
--- /dev/null
+++ b/testing/web-platform/tests/streams/writable-streams/constructor.any.js
@@ -0,0 +1,155 @@
+// META: global=window,worker
+'use strict';
+
+const error1 = new Error('error1');
+error1.name = 'error1';
+
+const error2 = new Error('error2');
+error2.name = 'error2';
+
+promise_test(() => {
+  let controller;
+  const ws = new WritableStream({
+    start(c) {
+      controller = c;
+    }
+  });
+
+  // Now error the stream after its construction.
+  controller.error(error1);
+
+  const writer = ws.getWriter();
+
+  assert_equals(writer.desiredSize, null, 'desiredSize should be null');
+  return writer.closed.catch(r => {
+    assert_equals(r, error1, 'ws should be errored by the passed error');
+  });
+}, 'controller argument should be passed to start method');
+
+promise_test(t => {
+  const ws = new WritableStream({
+    write(chunk, controller) {
+      controller.error(error1);
+    }
+  });
+
+  const writer = ws.getWriter();
+
+  return Promise.all([
+    writer.write('a'),
+    promise_rejects_exactly(t, error1, writer.closed, 'controller.error() in write() should error the stream')
+  ]);
+}, 'controller argument should be passed to write method');
+
+// Older versions of the standard had the controller argument passed to close(). It wasn't useful, and so has been
+// removed. This test remains to identify implementations that haven't been updated.
+promise_test(t => {
+  const ws = new WritableStream({
+    close(...args) {
+      t.step(() => {
+        assert_array_equals(args, [], 'no arguments should be passed to close');
+      });
+    }
+  });
+
+  return ws.getWriter().close();
+}, 'controller argument should not be passed to close method');
+
+promise_test(() => {
+  const ws = new WritableStream({}, {
+    highWaterMark: 1000,
+    size() { return 1; }
+  });
+
+  const writer = ws.getWriter();
+
+  assert_equals(writer.desiredSize, 1000, 'desiredSize should be 1000');
+  return writer.ready.then(v => {
+    assert_equals(v, undefined, 'ready promise should fulfill with undefined');
+  });
+}, 'highWaterMark should be reflected to desiredSize');
+
+promise_test(() => {
+  const ws = new WritableStream({}, {
+    highWaterMark: Infinity,
+    size() { return 0; }
+  });
+
+  const writer = ws.getWriter();
+
+  assert_equals(writer.desiredSize, Infinity, 'desiredSize should be Infinity');
+
+  return writer.ready;
+}, 'WritableStream should be writable and ready should fulfill immediately if the strategy does not apply ' +
+    'backpressure');
+
+test(() => {
+  new WritableStream();
+}, 'WritableStream should be constructible with no arguments');
+
+test(() => {
+  const underlyingSink = { get start() { throw error1; } };
+  const queuingStrategy = { highWaterMark: 0, get size() { throw error2; } };
+
+  // underlyingSink is converted in prose in the method body, whereas queuingStrategy is done at the IDL layer.
+  // So the queuingStrategy exception should be encountered first.
+  assert_throws_exactly(error2, () => new WritableStream(underlyingSink, queuingStrategy));
+}, 'underlyingSink argument should be converted after queuingStrategy argument');
+
+test(() => {
+  const ws = new WritableStream({});
+
+  const writer = ws.getWriter();
+
+  assert_equals(typeof writer.write, 'function', 'writer should have a write method');
+  assert_equals(typeof writer.abort, 'function', 'writer should have an abort method');
+  assert_equals(typeof writer.close, 'function', 'writer should have a close method');
+
+  assert_equals(writer.desiredSize, 1, 'desiredSize should start at 1');
+
+  assert_not_equals(typeof writer.ready, 'undefined', 'writer should have a ready property');
+  assert_equals(typeof writer.ready.then, 'function', 'ready property should be thenable');
+  assert_not_equals(typeof writer.closed, 'undefined', 'writer should have a closed property');
+  assert_equals(typeof writer.closed.then, 'function', 'closed property should be thenable');
+}, 'WritableStream instances should have standard methods and properties');
+
+test(() => {
+  let WritableStreamDefaultController;
+  new WritableStream({
+    start(c) {
+      WritableStreamDefaultController = c.constructor;
+    }
+  });
+
+  assert_throws_js(TypeError, () => new WritableStreamDefaultController({}),
+                   'constructor should throw a TypeError exception');
+}, 'WritableStreamDefaultController constructor should throw');
+
+test(() => {
+  let WritableStreamDefaultController;
+  const stream = new WritableStream({
+    start(c) {
+      WritableStreamDefaultController = c.constructor;
+    }
+  });
+
+  assert_throws_js(TypeError, () => new WritableStreamDefaultController(stream),
+                   'constructor should throw a TypeError exception');
+}, 'WritableStreamDefaultController constructor should throw when passed an initialised WritableStream');
+
+test(() => {
+  const stream = new WritableStream();
+  const writer = stream.getWriter();
+  const WritableStreamDefaultWriter = writer.constructor;
+  writer.releaseLock();
+  assert_throws_js(TypeError, () => new WritableStreamDefaultWriter({}),
+                   'constructor should throw a TypeError exception');
+}, 'WritableStreamDefaultWriter should throw unless passed a WritableStream');
+
+test(() => {
+  const stream = new WritableStream();
+  const writer = stream.getWriter();
+  const WritableStreamDefaultWriter = writer.constructor;
+  assert_throws_js(TypeError, () => new WritableStreamDefaultWriter(stream),
+                   'constructor should throw a TypeError exception');
+}, 'WritableStreamDefaultWriter constructor should throw when stream argument is locked');