[turbofan] Initial attempt to cleanup Node and related classes.

test/unittests/compiler/node-properties-unittest.cc

+// Copyright 2015 the V8 project 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 "src/compiler/common-operator.h"
+#include "src/compiler/node-properties-inl.h"
+#include "test/unittests/test-utils.h"
+#include "testing/gmock/include/gmock/gmock.h"
+
+using testing::IsNull;
+
+namespace v8 {
+namespace internal {
+namespace compiler {
+
+typedef TestWithZone NodePropertiesTest;
+
+
+TEST_F(NodePropertiesTest, FindProjection) {
+  CommonOperatorBuilder common(zone());
+  Node* start = Node::New(zone(), 0, common.Start(1), 0, nullptr, false);
+  Node* proj0 = Node::New(zone(), 1, common.Projection(0), 1, &start, false);
+  Node* proj1 = Node::New(zone(), 2, common.Projection(1), 1, &start, false);
+  EXPECT_EQ(proj0, NodeProperties::FindProjection(start, 0));
+  EXPECT_EQ(proj1, NodeProperties::FindProjection(start, 1));
+  EXPECT_THAT(NodeProperties::FindProjection(start, 2), IsNull());
+  EXPECT_THAT(NodeProperties::FindProjection(start, 1234567890), IsNull());
+}
+
+}  // namespace compiler
+}  // namespace internal
+}  // namespace v8