Cast channel: Add cast.channel.getLogs extension API.

extensions/browser/api/cast_channel/logger_unittest.cc

Index: extensions/browser/api/cast_channel/logger_unittest.cc
diff --git a/extensions/browser/api/cast_channel/logger_unittest.cc b/extensions/browser/api/cast_channel/logger_unittest.cc
index d1ec5fcdbbf2d676c92814e2eb21fdd5e3a7b7bc..6ce8801218d039e732c6af16d42e2dd5eabc9438 100644
--- a/extensions/browser/api/cast_channel/logger_unittest.cc
+++ b/extensions/browser/api/cast_channel/logger_unittest.cc
@@ -6,6 +6,7 @@
 #include "extensions/browser/api/cast_channel/cast_auth_util.h"
 #include "extensions/browser/api/cast_channel/logger.h"
 #include "testing/gtest/include/gtest/gtest.h"
+#include "third_party/zlib/zlib.h"
 
 namespace extensions {
 namespace core_api {
@@ -25,6 +26,52 @@ class CastChannelLoggerTest : public testing::Test {
                            base::TimeTicks())) {}
   virtual ~CastChannelLoggerTest() {}
 
+  bool Uncompress(const char* input, int length, std::string* output) {
+    z_stream stream = {0};
+
+    stream.next_in = reinterpret_cast<uint8*>(const_cast<char*>(input));
+    stream.avail_in = length;
+    stream.next_out = reinterpret_cast<uint8*>(&(*output)[0]);
+    stream.avail_out = output->size();
+
+    bool success = false;
+    while (stream.avail_in > 0 && stream.avail_out > 0) {
+      // 16 is added to read in gzip format.
+      int result = inflateInit2(&stream, MAX_WBITS + 16);
+      DCHECK_EQ(Z_OK, result);
+
+      result = inflate(&stream, Z_FINISH);
+      success = (result == Z_STREAM_END);
+      if (!success) {
+        DVLOG(2) << "inflate() failed. Result: " << result;
+        break;
+      }
+
+      result = inflateEnd(&stream);
+      DCHECK(result == Z_OK);
+    }
+
+    if (stream.avail_in == 0) {
+      success = true;
+      output->resize(output->size() - stream.avail_out);
+    }
+    return success;
+  }
+
+  bool GetLog(Log* log) {
+    int length = 0;
+    scoped_ptr<char[]> output = logger_->GetLogs(&length);
+    if (!output.get())
+      return false;
+
+    // 100kb should be enough for test purposes.
+    std::string uncompressed(100000, 0);
+    if (!Uncompress(output.get(), length, &uncompressed))
+      return false;
+
+    return log->ParseFromString(uncompressed);
+  }
+
  protected:
   base::SimpleTestTickClock* clock_;
   scoped_refptr<Logger> logger_;
@@ -54,13 +101,8 @@ TEST_F(CastChannelLoggerTest, BasicLogging) {
       "Parsing failed", AuthResult::ERROR_NSS_CERT_PARSING_FAILED, 4);
   logger_->LogSocketChallengeReplyEvent(2, auth_result);
 
-  std::string output;
-  bool success = logger_->LogToString(&output);
-  ASSERT_TRUE(success);
-
   Log log;
-  success = log.ParseFromString(output);
-  ASSERT_TRUE(success);
+  ASSERT_TRUE(GetLog(&log));
 
   ASSERT_EQ(2, log.aggregated_socket_event_size());
   {
@@ -127,13 +169,8 @@ TEST_F(CastChannelLoggerTest, TooManySockets) {
     logger_->LogSocketEvent(i, EventType::CAST_SOCKET_CREATED);
   }
 
-  std::string output;
-  bool success = logger_->LogToString(&output);
-  ASSERT_TRUE(success);
-
   Log log;
-  success = log.ParseFromString(output);
-  ASSERT_TRUE(success);
+  ASSERT_TRUE(GetLog(&log));
 
   ASSERT_EQ(kMaxSocketsToLog, log.aggregated_socket_event_size());
   EXPECT_EQ(5, log.num_evicted_aggregated_socket_events());
@@ -150,13 +187,8 @@ TEST_F(CastChannelLoggerTest, TooManyEvents) {
     clock_->Advance(base::TimeDelta::FromMicroseconds(1));
   }
 
-  std::string output;
-  bool success = logger_->LogToString(&output);
-  ASSERT_TRUE(success);
-
   Log log;
-  success = log.ParseFromString(output);
-  ASSERT_TRUE(success);
+  ASSERT_TRUE(GetLog(&log));
 
   ASSERT_EQ(1, log.aggregated_socket_event_size());
   EXPECT_EQ(0, log.num_evicted_aggregated_socket_events());
@@ -171,22 +203,14 @@ TEST_F(CastChannelLoggerTest, TooManyEvents) {
 TEST_F(CastChannelLoggerTest, Reset) {
   logger_->LogSocketEvent(1, EventType::CAST_SOCKET_CREATED);
 
-  std::string output;
-  bool success = logger_->LogToString(&output);
-  ASSERT_TRUE(success);
-
   Log log;
-  success = log.ParseFromString(output);
-  ASSERT_TRUE(success);
+  ASSERT_TRUE(GetLog(&log));
 
   EXPECT_EQ(1, log.aggregated_socket_event_size());
 
   logger_->Reset();
 
-  success = logger_->LogToString(&output);
-  ASSERT_TRUE(success);
-  success = log.ParseFromString(output);
-  ASSERT_TRUE(success);
+  ASSERT_TRUE(GetLog(&log));
 
   EXPECT_EQ(0, log.aggregated_socket_event_size());
 }