Define Text Sample Matchers and Test Functions

This change create some matchers and text functions that
will be used by the upcoming webvtt work.

Change-Id: I2d7931d1bdabd761f74e8aee7524d5ecfb7cfdc4

packager/media/base/media_handler_test_base.cc

@@ -7,6 +7,7 @@
 #include "packager/media/base/media_handler_test_base.h"
 
 #include "packager/media/base/audio_stream_info.h"
+#include "packager/media/base/text_stream_info.h"
 #include "packager/media/base/video_stream_info.h"
 #include "packager/status_test_util.h"
 
@@ -186,11 +187,31 @@ std::unique_ptr<SegmentInfo> MediaHandlerTestBase::GetSegmentInfo(
   return info;
 }
 
+std::unique_ptr<StreamInfo> MediaHandlerTestBase::GetTextStreamInfo() const {
+  // None of this information is actually used by the text out handler.
+  // The stream info is just needed to signal the start of the stream.
+  return std::unique_ptr<StreamInfo>(
+      new TextStreamInfo(0, 0, 0, kUnknownCodec, "", "", 0, 0, ""));
+}
+
+std::unique_ptr<TextSample> MediaHandlerTestBase::GetTextSample(
+    const std::string& id,
+    uint64_t start,
+    uint64_t end,
+    const std::string& payload) const {
+  std::unique_ptr<TextSample> sample(new TextSample);
+  sample->set_id(id);
+  sample->SetTime(start, end);
+  sample->AppendPayload(payload);
+
+  return sample;
+}
 MediaHandlerGraphTestBase::MediaHandlerGraphTestBase()
     : next_handler_(new FakeMediaHandler),
       some_handler_(new FakeMediaHandler) {}
 
-void MediaHandlerGraphTestBase::SetUpGraph(size_t num_inputs,
+void MediaHandlerGraphTestBase::SetUpGraph(
+    size_t num_inputs,
     size_t num_outputs,
     std::shared_ptr<MediaHandler> handler) {
   // Input handler is not really used anywhere but just to satisfy one input

packager/media/base/media_handler_test_base.h

@@ -74,6 +74,15 @@ MATCHER_P4(IsMediaSample, stream_index, timestamp, duration, encrypted, "") {
          arg->media_sample->is_encrypted() == encrypted;
 }
 
+MATCHER_P5(IsTextSample, id, start_time, end_time, settings, payload, "") {
+  return arg->stream_data_type == StreamDataType::kTextSample &&
+         arg->text_sample->id() == id &&
+         arg->text_sample->start_time() == start_time &&
+         arg->text_sample->EndTime() == end_time &&
+         arg->text_sample->settings() == settings &&
+         arg->text_sample->payload() == payload;
+}
+
 class FakeInputMediaHandler : public MediaHandler {
  public:
   using MediaHandler::Dispatch;
@@ -155,6 +164,13 @@ class MediaHandlerTestBase : public ::testing::Test {
                                               int64_t duration,
                                               bool is_subsegment) const;
 
+  std::unique_ptr<StreamInfo> GetTextStreamInfo() const;
+
+  std::unique_ptr<TextSample> GetTextSample(const std::string& id,
+                                            uint64_t start,
+                                            uint64_t end,
+                                            const std::string& payload) const;
+
  private:
   MediaHandlerTestBase(const MediaHandlerTestBase&) = delete;
   MediaHandlerTestBase& operator=(const MediaHandlerTestBase&) = delete;