Initial Timeline Events

runtime/vm/timeline_test.cc

Index: runtime/vm/timeline_test.cc
diff --git a/runtime/vm/timeline_test.cc b/runtime/vm/timeline_test.cc
new file mode 100644
index 0000000000000000000000000000000000000000..344b2070690f705b3d7017622037f288169f1d98
--- /dev/null
+++ b/runtime/vm/timeline_test.cc
@@ -0,0 +1,136 @@
+// Copyright (c) 2015, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
+#include "platform/assert.h"
+
+#include "vm/dart_api_impl.h"
+#include "vm/dart_api_state.h"
+#include "vm/globals.h"
+#include "vm/timeline.h"
+#include "vm/unit_test.h"
+
+namespace dart {
+
+TEST_CASE(TimelineEventIsValid) {
+  // Create a test stream.
+  TimelineStream stream;
+  stream.Init("testStream", true);
+
+  TimelineEvent event;
+
+  // Starts invalid.
+  EXPECT(!event.IsValid());
+
+  // Becomes valid.
+  event.Instant(&stream, "hello");
+  EXPECT(event.IsValid());
+
+  // Becomes invalid.
+  event.Reset();
+  EXPECT(!event.IsValid());
+}
+
+
+TEST_CASE(TimelineEventDuration) {
+  // Create a test stream.
+  TimelineStream stream;
+  stream.Init("testStream", true);
+
+  // Create a test event.
+  TimelineEvent event;
+  event.DurationBegin(&stream, "apple");
+  // Measure the duration.
+  int64_t current_duration = event.TimeDuration();
+  event.DurationEnd();
+  // Verify that duration is larger.
+  EXPECT_GE(event.TimeDuration(), current_duration);
+}
+
+
+TEST_CASE(TimelineEventDurationPrintJSON) {
+  // Create a test stream.
+  TimelineStream stream;
+  stream.Init("testStream", true);
+
+  // Create a test event.
+  TimelineEvent event;
+  event.DurationBegin(&stream, "apple");
+  {
+    // Test printing to JSON.
+    JSONStream js;
+    event.PrintJSON(&js);
+    // Check category
+    EXPECT_SUBSTRING("\"cat\":\"testStream\"", js.ToCString());
+    // Check name.
+    EXPECT_SUBSTRING("\"name\":\"apple\"", js.ToCString());
+    // Check phase.
+    EXPECT_SUBSTRING("\"ph\":\"X\"", js.ToCString());
+    // Check that ts key is present.
+    EXPECT_SUBSTRING("\"ts\":", js.ToCString());
+    // Check that dur key is present.
+    EXPECT_SUBSTRING("\"dur\":", js.ToCString());
+  }
+  event.DurationEnd();
+}
+
+
+TEST_CASE(TimelineEventArguments) {
+  // Create a test stream.
+  TimelineStream stream;
+  stream.Init("testStream", true);
+
+  // Create a test event.
+  TimelineEvent event;
+
+  // Allocate room for four arguments.
+  event.SetNumArguments(4);
+  // Reset.
+  event.Reset();
+
+  event.DurationBegin(&stream, "apple");
+  event.SetNumArguments(2);
+  event.CopyArgument(0, "arg1", "value1");
+  event.CopyArgument(1, "arg2", "value2");
+  event.DurationEnd();
+}
+
+
+TEST_CASE(TimelineEventArgumentsPrintJSON) {
+  // Create a test stream.
+  TimelineStream stream;
+  stream.Init("testStream", true);
+
+  // Create a test event.
+  TimelineEvent event;
+
+  event.DurationBegin(&stream, "apple");
+  event.SetNumArguments(2);
+  event.CopyArgument(0, "arg1", "value1");
+  event.CopyArgument(1, "arg2", "value2");
+  event.DurationEnd();
+
+  {
+    // Test printing to JSON.
+    JSONStream js;
+    event.PrintJSON(&js);
+
+    // Check both arguments.
+    EXPECT_SUBSTRING("\"arg1\":\"value1\"", js.ToCString());
+    EXPECT_SUBSTRING("\"arg2\":\"value2\"", js.ToCString());
+  }
+}
+
+
+TEST_CASE(TimelineEventBufferPrintJSON) {
+  Isolate* isolate = Isolate::Current();
+  TimelineEventBuffer* buffer = isolate->timeline_event_buffer();
+  JSONStream js;
+  buffer->PrintJSON(&js);
+  // Check the type. This test will fail if we ever make Timeline public.
+  EXPECT_SUBSTRING("\"type\":\"_Timeline\"", js.ToCString());
+  // Check that there is a traceEvents array.
+  EXPECT_SUBSTRING("\"traceEvents\":[", js.ToCString());
+}
+
+}  // namespace dart