1 files changed, 128 insertions, 0 deletions
diff --git a/chrome/browser/chromeos/external_metrics_unittest.cc b/chrome/browser/chromeos/external_metrics_unittest.cc
new file mode 100644
index 0000000..1558734
--- /dev/null
+++ b/chrome/browser/chromeos/external_metrics_unittest.cc
@@ -0,0 +1,128 @@
+// Copyright (c) 2009 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include <errno.h>
+#include <sys/file.h>
+
+#include "base/basictypes.h"
+#include "base/hash_tables.h"
+#include "base/scoped_ptr.h"
+#include "chrome/browser/chromeos/external_metrics.h"
+#include "testing/gtest/include/gtest/gtest.h"
+
+namespace chromeos {  // Need this because of the FRIEND_TEST
+
+class ExternalMetricsTest : public testing::Test {
+};
+
+// Because the metrics service is not essential, errors will not cause the
+// program to terminate.  However, the errors produce logs.
+
+#define MAXLENGTH ExternalMetrics::kMetricsMessageMaxLength
+
+static void SendMessage(const char* path, const char* name, const char* value) {
+  int fd = open(path, O_CREAT | O_APPEND | O_WRONLY, 0666);
+  int32 l = strlen(name) + strlen(value) + 2 + sizeof(l);
+  int num_bytes;
+  num_bytes = write(fd, &l, sizeof(l));
+  num_bytes = write(fd, name, strlen(name) + 1);
+  num_bytes = write(fd, value, strlen(value) + 1);
+  close(fd);
+}
+
+static scoped_ptr<std::string> received_name;
+static scoped_ptr<std::string> received_value;
+int received_count = 0;
+
+static void ReceiveMessage(const char* name, const char* value) {
+  received_name.reset(new std::string(name));
+  received_value.reset(new std::string(value));
+  received_count++;
+}
+
+static void CheckMessage(const char* name, const char* value, int count) {
+  EXPECT_EQ(*received_name.get(), name);
+  EXPECT_EQ(*received_value.get(), value);
+  EXPECT_EQ(received_count, count);
+}
+
+TEST(ExternalMetricsTest, ParseExternalMetricsFile) {
+  const char *histogram_data[] = {
+    "BootTime 9500 0 20000 50",
+    "BootTime 10000 0 20000 50",
+    "BootTime 9200 0 20000 50",
+    "ConnmanIdle 1000 0 2000 20",
+    "ConnmanIdle 1200 0 2000 20",
+    "ConnmanDisconnect 1000 0 2000 20",
+    "ConnmanFailure 1000 0 2000 20",
+    "ConnmanFailure 13000 2000 20",
+    "ConnmanAssociation 1000 0 2000 20",
+    "ConnmanConfiguration 1000 0 2000 20",
+    "ConnmanOffline 1000 0 2000 20",
+    "ConnmanOnline 1000 0 2000 20",
+    "ConnmanOffline 2000 0 2000 20",
+    "ConnmanReady 33000 0 100000 50",
+    "ConnmanReady 44000 0 100000 50",
+    "ConnmanReady 22000 0 100000 50",
+  };
+  int nhist = ARRAYSIZE_UNSAFE(histogram_data);
+  int32 i;
+  const char* path = "/tmp/.chromeos-metrics";
+  scoped_refptr<chromeos::ExternalMetrics>
+      external_metrics(new chromeos::ExternalMetrics());
+  external_metrics->test_recorder_ = &ReceiveMessage;
+  external_metrics->test_path_ = FilePath(path);
+  EXPECT_TRUE(unlink(path) == 0 || errno == ENOENT);
+
+  // Sends a few valid messages.  Once in a while, collects them and checks the
+  // last message.  We don't want to check every single message because we also
+  // want to test the ability to deal with a file containing more than one
+  // message.
+  for (i = 0; i < nhist; i++) {
+    SendMessage(path, "histogram", histogram_data[i]);
+    if (i % 3 == 2) {
+      external_metrics->CollectEvents();
+      CheckMessage("histogram", histogram_data[i], i + 1);
+    }
+  }
+
+  // Sends a message that's too large.
+  char b[MAXLENGTH + 100];
+  for (i = 0; i < MAXLENGTH + 99; i++) {
+    b[i] = 'x';
+  }
+  b[i] = '\0';
+  SendMessage(path, b, "yyy");
+  external_metrics->CollectEvents();
+  EXPECT_EQ(received_count, nhist);
+
+  // Sends a malformed message (first string is not null-terminated).
+  i = 100 + sizeof(i);
+  int fd = open(path, O_CREAT | O_WRONLY, 0666);
+  EXPECT_GT(fd, 0);
+  EXPECT_EQ(write(fd, &i, sizeof(i)), static_cast<int>(sizeof(i)));
+  EXPECT_EQ(write(fd, b, i), i);
+  EXPECT_EQ(close(fd), 0);
+
+  external_metrics->CollectEvents();
+  EXPECT_EQ(received_count, nhist);
+
+  // Sends a malformed message (second string is not null-terminated).
+  b[50] = '\0';
+  fd = open(path, O_CREAT | O_WRONLY, 0666);
+  EXPECT_GT(fd, 0);
+  EXPECT_EQ(write(fd, &i, sizeof(i)), static_cast<int>(sizeof(i)));
+  EXPECT_EQ(write(fd, b, i), i);
+  EXPECT_EQ(close(fd), 0);
+
+  external_metrics->CollectEvents();
+  EXPECT_EQ(received_count, nhist);
+
+  // Checks that we survive when file doesn't exist.
+  EXPECT_EQ(unlink(path), 0);
+  external_metrics->CollectEvents();
+  EXPECT_EQ(received_count, nhist);
+}
+
+}  // namespace chromeos