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// Copyright 2017 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 "third_party/blink/renderer/platform/scheduler/common/tracing_helper.h"
#include <unordered_set>
#include "testing/gtest/include/gtest/gtest.h"
namespace blink {
namespace scheduler {
namespace {
const char* g_last_state = nullptr;
void ExpectTraced(const char* state) {
EXPECT_TRUE(state);
EXPECT_TRUE(g_last_state);
EXPECT_STREQ(state, g_last_state);
g_last_state = nullptr;
}
void ExpectNotTraced() {
EXPECT_FALSE(g_last_state);
}
const char* SignOfInt(int value) {
if (value > 0)
return "positive";
if (value < 0)
return "negative";
return "zero";
}
class TraceableStateForTest
: public TraceableState<int, TracingCategoryName::kDefault> {
public:
TraceableStateForTest(TraceableVariableController* controller)
: TraceableState(0, "State", controller, controller, SignOfInt) {
// We shouldn't expect trace in constructor here because mock isn't set yet.
mock_trace_for_test_ = &MockTrace;
}
TraceableStateForTest& operator=(const int& value) {
Assign(value);
return *this;
}
static void MockTrace(const char* state) {
EXPECT_TRUE(state);
EXPECT_FALSE(g_last_state); // No unexpected traces.
g_last_state = state;
}
};
} // namespace
// TODO(kraynov): TraceableCounter tests.
TEST(TracingHelperTest, TraceableState) {
TraceableVariableController controller;
TraceableStateForTest state(&controller);
controller.OnTraceLogEnabled();
ExpectTraced("zero");
state = 0;
ExpectNotTraced();
state = 1;
ExpectTraced("positive");
state = -1;
ExpectTraced("negative");
}
TEST(TracingHelperTest, TraceableStateOperators) {
TraceableVariableController controller;
TraceableState<int, TracingCategoryName::kDebug> x(-1, "X", &controller,
&controller, SignOfInt);
TraceableState<int, TracingCategoryName::kDebug> y(1, "Y", &controller,
&controller, SignOfInt);
EXPECT_EQ(0, x + y);
EXPECT_FALSE(x == y);
EXPECT_TRUE(x != y);
x = 1;
EXPECT_EQ(0, y - x);
EXPECT_EQ(2, x + y);
EXPECT_EQ(x, y);
EXPECT_FALSE(x != y);
EXPECT_NE(x + y, 3);
EXPECT_EQ(2 - y + 1 + x, 3);
x = 3;
y = 2;
int z = x = y;
EXPECT_EQ(2, z);
}
} // namespace scheduler
} // namespace blink
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