Implementation of WritableStream

third_party/WebKit/LayoutTests/http/tests/streams/resources/recording-streams.js

Index: third_party/WebKit/LayoutTests/http/tests/streams/resources/recording-streams.js
diff --git a/third_party/WebKit/LayoutTests/http/tests/streams/resources/recording-streams.js b/third_party/WebKit/LayoutTests/http/tests/streams/resources/recording-streams.js
new file mode 100644
index 0000000000000000000000000000000000000000..9837318dbcc025c39327243d51ff74fed884de9e
--- /dev/null
+++ b/third_party/WebKit/LayoutTests/http/tests/streams/resources/recording-streams.js
@@ -0,0 +1,90 @@
+'use strict';
+
+self.recordingReadableStream = (extras = {}, strategy) => {
+  let controllerToCopyOver;
+  const stream = new ReadableStream({
+    start(controller) {
+      controllerToCopyOver = controller;
+
+      if (extras.start) {
+        return extras.start(controller);
+      }
+
+      return undefined;
+    },
+    pull(controller) {
+      stream.events.push('pull');
+
+      if (extras.pull) {
+        return extras.pull(controller);
+      }
+
+      return undefined;
+    },
+    cancel(reason) {
+      stream.events.push('cancel', reason);
+      stream.eventsWithoutPulls.push('cancel', reason);
+
+      if (extras.cancel) {
+        return extras.cancel(reason);
+      }
+
+      return undefined;
+    }
+  }, strategy);
+
+  stream.controller = controllerToCopyOver;
+  stream.events = [];
+  stream.eventsWithoutPulls = [];
+
+  return stream;
+};
+
+self.recordingWritableStream = (extras = {}, strategy) => {
+  let controllerToCopyOver;
+  const stream = new WritableStream({
+    start(controller) {
+      controllerToCopyOver = controller;
+
+      if (extras.start) {
+        return extras.start(controller);
+      }
+
+      return undefined;
+    },
+    write(chunk) {
+      stream.events.push('write', chunk);
+
+      if (extras.write) {
+        return extras.write(chunk);
+      }
+
+      return undefined;
+    },
+    close(...args) {
+      assert_array_equals(args, [controllerToCopyOver], 'close must always be called with the controller');
+
+      stream.events.push('close');
+
+      if (extras.close) {
+        return extras.close();
+      }
+
+      return undefined;
+    },
+    abort(e) {
+      stream.events.push('abort', e);
+
+      if (extras.abort) {
+        return extras.abort(e);
+      }
+
+      return undefined;
+    }
+  }, strategy);
+
+  stream.controller = controllerToCopyOver;
+  stream.events = [];
+
+  return stream;
+};