Add m-esr52 at 52.6.0

1 files changed, 260 insertions, 0 deletions

diff --git a/testing/xpcshell/node-http2/test/flow.js b/testing/xpcshell/node-http2/test/flow.js
new file mode 100644
index 000000000..a077c6845
--- /dev/null
+++ b/testing/xpcshell/node-http2/test/flow.js
@@ -0,0 +1,260 @@
+var expect = require('chai').expect;
+var util = require('./util');
+
+var Flow = require('../lib/protocol/flow').Flow;
+
+var MAX_PAYLOAD_SIZE = 16384;
+
+function createFlow(log) {
+  var flowControlId = util.random(10, 100);
+  var flow = new Flow(flowControlId);
+  flow._log = util.log.child(log || {});
+  return flow;
+}
+
+describe('flow.js', function() {
+  describe('Flow class', function() {
+    var flow;
+    beforeEach(function() {
+      flow = createFlow();
+    });
+
+    describe('._receive(frame, callback) method', function() {
+      it('is called when there\'s a frame in the input buffer to be consumed', function(done) {
+        var frame = { type: 'PRIORITY', flags: {}, priority: 1 };
+        flow._receive = function _receive(receivedFrame, callback) {
+          expect(receivedFrame).to.equal(frame);
+          callback();
+        };
+        flow.write(frame, done);
+      });
+      it('has to be overridden by the child class, otherwise it throws', function() {
+        expect(flow._receive.bind(flow)).to.throw(Error);
+      });
+    });
+    describe('._send() method', function() {
+      it('is called when the output buffer should be filled with more frames and the flow' +
+         'control queue is empty', function() {
+        var notFlowControlledFrame = { type: 'PRIORITY', flags: {}, priority: 1 };
+        flow._send = function _send() {
+          this.push(notFlowControlledFrame);
+        };
+        expect(flow.read()).to.equal(notFlowControlledFrame);
+
+        flow._window = 0;
+        flow._queue.push({ type: 'DATA', flags: {}, data: { length: 1 } });
+        var frame = flow.read();
+        while (frame.type === notFlowControlledFrame.type) frame = flow.read();
+        expect(frame.type).to.equal('BLOCKED');
+        expect(flow.read()).to.equal(null);
+      });
+      it('has to be overridden by the child class, otherwise it throws', function() {
+        expect(flow._send.bind(flow)).to.throw(Error);
+      });
+    });
+    describe('._increaseWindow(size) method', function() {
+      it('should increase `this._window` by `size`', function() {
+        flow._send = util.noop;
+        flow._window = 0;
+
+        var increase1 = util.random(0,100);
+        var increase2 = util.random(0,100);
+        flow._increaseWindow(increase1);
+        flow._increaseWindow(increase2);
+        expect(flow._window).to.equal(increase1 + increase2);
+
+        flow._increaseWindow(Infinity);
+        expect(flow._window).to.equal(Infinity);
+      });
+      it('should emit error when increasing with a finite `size` when `_window` is infinite', function() {
+        flow._send = util.noop;
+        flow._increaseWindow(Infinity);
+        var increase = util.random(1,100);
+
+        expect(flow._increaseWindow.bind(flow, increase)).to.throw('Uncaught, unspecified "error" event.');
+      });
+      it('should emit error when `_window` grows over the window limit', function() {
+        var WINDOW_SIZE_LIMIT = Math.pow(2, 31) - 1;
+        flow._send = util.noop;
+        flow._window = 0;
+
+        flow._increaseWindow(WINDOW_SIZE_LIMIT);
+        expect(flow._increaseWindow.bind(flow, 1)).to.throw('Uncaught, unspecified "error" event.');
+
+      });
+    });
+    describe('.read() method', function() {
+      describe('when the flow control queue is not empty', function() {
+        it('should return the first item in the queue if the window is enough', function() {
+          var priorityFrame = { type: 'PRIORITY', flags: {}, priority: 1 };
+          var dataFrame = { type: 'DATA', flags: {}, data: { length: 10 } };
+          flow._send = util.noop;
+          flow._window = 10;
+          flow._queue = [priorityFrame, dataFrame];
+
+          expect(flow.read()).to.equal(priorityFrame);
+          expect(flow.read()).to.equal(dataFrame);
+        });
+        it('should also split DATA frames when needed', function() {
+          var buffer = new Buffer(10);
+          var dataFrame = { type: 'DATA', flags: {}, stream: util.random(0, 100), data: buffer };
+          flow._send = util.noop;
+          flow._window = 5;
+          flow._queue = [dataFrame];
+
+          var expectedFragment = { flags: {}, type: 'DATA', stream: dataFrame.stream, data: buffer.slice(0,5) };
+          expect(flow.read()).to.deep.equal(expectedFragment);
+          expect(dataFrame.data).to.deep.equal(buffer.slice(5));
+        });
+      });
+    });
+    describe('.push(frame) method', function() {
+      it('should push `frame` into the output queue or the flow control queue', function() {
+        var priorityFrame = { type: 'PRIORITY', flags: {}, priority: 1 };
+        var dataFrame = { type: 'DATA', flags: {}, data: { length: 10 } };
+        flow._window = 10;
+
+        flow.push(dataFrame);     // output queue
+        flow.push(dataFrame);     // flow control queue, because of depleted window
+        flow.push(priorityFrame); // flow control queue, because it's not empty
+
+        expect(flow.read()).to.be.equal(dataFrame);
+        expect(flow._queue[0]).to.be.equal(dataFrame);
+        expect(flow._queue[1]).to.be.equal(priorityFrame);
+      });
+    });
+    describe('.write() method', function() {
+      it('call with a DATA frame should trigger sending WINDOW_UPDATE if remote flow control is not' +
+         'disabled', function(done) {
+        flow._window = 100;
+        flow._send = util.noop;
+        flow._receive = function(frame, callback) {
+          callback();
+        };
+
+        var buffer = new Buffer(util.random(10, 100));
+        flow.write({ type: 'DATA', flags: {}, data: buffer });
+        flow.once('readable', function() {
+          expect(flow.read()).to.be.deep.equal({
+            type: 'WINDOW_UPDATE',
+            flags: {},
+            stream: flow._flowControlId,
+            window_size: buffer.length
+          });
+          done();
+        });
+      });
+    });
+  });
+  describe('test scenario', function() {
+    var flow1, flow2;
+    beforeEach(function() {
+      flow1 = createFlow({ flow: 1 });
+      flow2 = createFlow({ flow: 2 });
+      flow1._flowControlId = flow2._flowControlId;
+      flow1._send = flow2._send = util.noop;
+      flow1._receive = flow2._receive = function(frame, callback) { callback(); };
+    });
+
+    describe('sending a large data stream', function() {
+      it('should work as expected', function(done) {
+        // Sender side
+        var frameNumber = util.random(5, 8);
+        var input = [];
+        flow1._send = function _send() {
+          if (input.length >= frameNumber) {
+            this.push({ type: 'DATA', flags: { END_STREAM: true }, data: new Buffer(0) });
+            this.push(null);
+          } else {
+            var buffer = new Buffer(util.random(1000, 100000));
+            input.push(buffer);
+            this.push({ type: 'DATA', flags: {}, data: buffer });
+          }
+        };
+
+        // Receiver side
+        var output = [];
+        flow2._receive = function _receive(frame, callback) {
+          if (frame.type === 'DATA') {
+            expect(frame.data.length).to.be.lte(MAX_PAYLOAD_SIZE);
+            output.push(frame.data);
+          }
+          if (frame.flags.END_STREAM) {
+            this.emit('end_stream');
+          }
+          callback();
+        };
+
+        // Checking results
+        flow2.on('end_stream', function() {
+          input = util.concat(input);
+          output = util.concat(output);
+
+          expect(input).to.deep.equal(output);
+
+          done();
+        });
+
+        // Start piping
+        flow1.pipe(flow2).pipe(flow1);
+      });
+    });
+
+    describe('when running out of window', function() {
+      it('should send a BLOCKED frame', function(done) {
+        // Sender side
+        var frameNumber = util.random(5, 8);
+        var input = [];
+        flow1._send = function _send() {
+          if (input.length >= frameNumber) {
+            this.push({ type: 'DATA', flags: { END_STREAM: true }, data: new Buffer(0) });
+            this.push(null);
+          } else {
+            var buffer = new Buffer(util.random(1000, 100000));
+            input.push(buffer);
+            this.push({ type: 'DATA', flags: {}, data: buffer });
+          }
+        };
+
+        // Receiver side
+        // Do not send WINDOW_UPDATESs except when the other side sends BLOCKED
+        var output = [];
+        flow2._restoreWindow = util.noop;
+        flow2._receive = function _receive(frame, callback) {
+          if (frame.type === 'DATA') {
+            expect(frame.data.length).to.be.lte(MAX_PAYLOAD_SIZE);
+            output.push(frame.data);
+          }
+          if (frame.flags.END_STREAM) {
+            this.emit('end_stream');
+          }
+          if (frame.type === 'BLOCKED') {
+            setTimeout(function() {
+              this._push({
+                type: 'WINDOW_UPDATE',
+                flags: {},
+                stream: this._flowControlId,
+                window_size: this._received
+              });
+              this._received = 0;
+            }.bind(this), 20);
+          }
+          callback();
+        };
+
+        // Checking results
+        flow2.on('end_stream', function() {
+          input = util.concat(input);
+          output = util.concat(output);
+
+          expect(input).to.deep.equal(output);
+
+          done();
+        });
+
+        // Start piping
+        flow1.pipe(flow2).pipe(flow1);
+      });
+    });
+  });
+});