Frame frame = new TextFrame().setPayload("hello");
ext.outgoingFrame(frame, null, BatchMode.OFF);
capture.assertFrameCount(1);
capture.assertHasFrame(OpCode.TEXT, 1);
WebSocketFrame actual = capture.getFrames().getFirst();
Assert.assertThat("Frame.opcode", actual.getOpCode(), is(OpCode.TEXT));
Assert.assertThat("Frame.fin", actual.isFin(), is(true));