[tracing] Add test to graphics_memory_dump_provider_android.cc

Follow-up cl to crrev.com/1383733002, adds a unittest for the
graphics_memory_dump_provider_android.cc dump provider plus the
tedious gyp reshuffling required to make it happen.

BUG=529451
TEST=build/android/test_runner.py gtest -s components_unittests --gtest_filter='GraphicsMemoryDumpProviderTest.ParseResponse'

Review URL: https://codereview.chromium.org/1396313002

Cr-Commit-Position: refs/heads/master@{#354252}

3 files changed, 66 insertions, 13 deletions

diff --git a/components/tracing/BUILD.gn b/components/tracing/BUILD.gn
index b8ab5a9..40e90f9 100644
--- a/components/tracing/BUILD.gn
+++ b/components/tracing/BUILD.gn
@@ -39,18 +39,21 @@ component("startup_tracing") {
   ]
 }
 
-if (!is_android) {
-  source_set("unit_tests") {
-    testonly = true
-
-    sources = [
-      "trace_config_file_unittest.cc",
-    ]
-
-    deps = [
-      ":startup_tracing",
-      "//base/test:test_support",
-      "//testing/gtest",
-    ]
+source_set("unit_tests") {
+  testonly = true
+
+  sources = [
+    "graphics_memory_dump_provider_android_unittest.cc",
+  ]
+
+  deps = [
+    ":tracing",
+    "//base/test:test_support",
+    "//testing/gtest",
+  ]
+
+  if (!is_android) {
+    sources += [ "trace_config_file_unittest.cc" ]
+    deps += [ ":startup_tracing" ]
   }
 }
diff --git a/components/tracing/graphics_memory_dump_provider_android.h b/components/tracing/graphics_memory_dump_provider_android.h
index 3a9aa65..c9dfd21 100644
--- a/components/tracing/graphics_memory_dump_provider_android.h
+++ b/components/tracing/graphics_memory_dump_provider_android.h
@@ -8,6 +8,7 @@
 #include <string>
 
 #include "base/containers/hash_tables.h"
+#include "base/gtest_prod_util.h"
 #include "base/memory/singleton.h"
 #include "base/trace_event/memory_dump_provider.h"
 #include "components/tracing/tracing_export.h"
@@ -29,6 +30,7 @@ class TRACING_EXPORT GraphicsMemoryDumpProvider
                     base::trace_event::ProcessMemoryDump* pmd) override;
 
  private:
+  FRIEND_TEST_ALL_PREFIXES(GraphicsMemoryDumpProviderTest, ParseResponse);
   friend struct base::DefaultSingletonTraits<GraphicsMemoryDumpProvider>;
 
   void ParseResponseAndAddToDump(const char* buf,
diff --git a/components/tracing/graphics_memory_dump_provider_android_unittest.cc b/components/tracing/graphics_memory_dump_provider_android_unittest.cc
new file mode 100644
index 0000000..7b9d154
--- /dev/null
+++ b/components/tracing/graphics_memory_dump_provider_android_unittest.cc
@@ -0,0 +1,48 @@
+// Copyright 2015 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 "base/trace_event/memory_allocator_dump.h"
+#include "base/trace_event/process_memory_dump.h"
+#include "base/trace_event/trace_event_argument.h"
+#include "components/tracing/graphics_memory_dump_provider_android.h"
+#include "testing/gtest/include/gtest/gtest.h"
+
+namespace tracing {
+
+TEST(GraphicsMemoryDumpProviderTest, ParseResponse) {
+  const char* kDumpBaseName = GraphicsMemoryDumpProvider::kDumpBaseName;
+
+  base::trace_event::ProcessMemoryDump pmd(nullptr);
+  auto instance = GraphicsMemoryDumpProvider::GetInstance();
+  char buf[] = "graphics_total 12\ngraphics_pss 34\ngl_total 56\ngl_pss 78";
+  instance->ParseResponseAndAddToDump(buf, strlen(buf), &pmd);
+
+  // Check the "graphics" row.
+  auto mad = pmd.GetAllocatorDump(kDumpBaseName + std::string("graphics"));
+  ASSERT_TRUE(mad);
+  std::string json;
+  mad->attributes_for_testing()->AppendAsTraceFormat(&json);
+  ASSERT_EQ(
+      "{\"pss\":{\"type\":\"scalar\",\"units\":\"bytes\",\"value\":\"22\"},"
+      "\"total\":{\"type\":\"scalar\",\"units\":\"bytes\",\"value\":\"c\"}}",
+      json);
+
+  // Check the "gl" row.
+  mad = pmd.GetAllocatorDump(kDumpBaseName + std::string("gl"));
+  ASSERT_TRUE(mad);
+  json = "";
+  mad->attributes_for_testing()->AppendAsTraceFormat(&json);
+  ASSERT_EQ(
+      "{\"pss\":{\"type\":\"scalar\",\"units\":\"bytes\",\"value\":\"4e\"},"
+      "\"total\":{\"type\":\"scalar\",\"units\":\"bytes\",\"value\":\"38\"}}",
+      json);
+
+  // Test for truncated input.
+  pmd.Clear();
+  instance->ParseResponseAndAddToDump(buf, strlen(buf) - 14, &pmd);
+  ASSERT_TRUE(pmd.GetAllocatorDump(kDumpBaseName + std::string("graphics")));
+  ASSERT_FALSE(pmd.GetAllocatorDump(kDumpBaseName + std::string("gl")));
+}
+
+}  // namespace tracing