Add example usages and tests to scoped_ptr.h and tuple.h.

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@1305 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 109 insertions, 0 deletions

diff --git a/base/tuple_unittest.cc b/base/tuple_unittest.cc
new file mode 100644
index 0000000..36ea560
--- /dev/null
+++ b/base/tuple_unittest.cc
@@ -0,0 +1,109 @@
+// Copyright (c) 2006-2008 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/tuple.h"
+#include "testing/gtest/include/gtest/gtest.h"
+
+namespace {
+
+void DoAdd(int a, int b, int c, int* res) {
+  *res = a + b + c;
+}
+
+struct Addy {
+  Addy() { }
+  void DoAdd(int a, int b, int c, int d, int* res) {
+    *res = a + b + c + d;
+  }
+};
+
+}  // namespace
+
+TEST(TupleTest, Basic) {
+  Tuple0 t0 = MakeTuple();
+  Tuple1<int> t1(1);
+  Tuple2<int, const char*> t2 = MakeTuple(1, static_cast<const char*>("wee"));
+  Tuple3<int, int, int> t3(1, 2, 3);
+  Tuple4<int, int, int, int*> t4(1, 2, 3, &t1.a);
+  Tuple5<int, int, int, int, int*> t5(1, 2, 3, 4, &t4.a);
+
+  EXPECT_EQ(1, t1.a);
+  EXPECT_EQ(1, t2.a);
+  EXPECT_EQ(1, t3.a);
+  EXPECT_EQ(2, t3.b);
+  EXPECT_EQ(3, t3.c);
+  EXPECT_EQ(1, t4.a);
+  EXPECT_EQ(2, t4.b);
+  EXPECT_EQ(3, t4.c);
+  EXPECT_EQ(1, t5.a);
+  EXPECT_EQ(2, t5.b);
+  EXPECT_EQ(3, t5.c);
+  EXPECT_EQ(4, t5.d);
+
+
+  EXPECT_EQ(1, t1.a);
+  DispatchToFunction(&DoAdd, t4);
+  EXPECT_EQ(6, t1.a);
+
+  int res = 0;
+  DispatchToFunction(&DoAdd, MakeTuple(9, 8, 7, &res));
+  EXPECT_EQ(24, res);
+
+  Addy addy;
+  EXPECT_EQ(1, t4.a);
+  DispatchToMethod(&addy, &Addy::DoAdd, t5);
+  EXPECT_EQ(10, t4.a);
+}
+
+namespace {
+
+struct CopyLogger {
+  CopyLogger() { ++TimesConstructed; }
+  CopyLogger(const CopyLogger& tocopy) { ++TimesConstructed; ++TimesCopied; }
+  ~CopyLogger() { }
+
+  static int TimesCopied;
+  static int TimesConstructed;
+};
+
+void SomeLoggerMethRef(const CopyLogger& logy, const CopyLogger* ptr, bool* b) {
+  *b = &logy == ptr;
+}
+
+void SomeLoggerMethCopy(CopyLogger logy, const CopyLogger* ptr, bool* b) {
+  *b = &logy == ptr;
+}
+
+int CopyLogger::TimesCopied = 0;
+int CopyLogger::TimesConstructed = 0;
+
+}  // namespace
+
+TEST(TupleTest, Copying) {
+  CopyLogger logger;
+  EXPECT_EQ(0, CopyLogger::TimesCopied);
+  EXPECT_EQ(1, CopyLogger::TimesConstructed);
+
+  bool res = false;
+
+  // Creating the tuple should copy the class to store internally in the tuple.
+  Tuple3<CopyLogger, CopyLogger*, bool*> tuple(logger, &logger, &res);
+  tuple.b = &tuple.a;
+  EXPECT_EQ(2, CopyLogger::TimesConstructed);
+  EXPECT_EQ(1, CopyLogger::TimesCopied);
+
+  // Our internal Logger and the one passed to the function should be the same.
+  res = false;
+  DispatchToFunction(&SomeLoggerMethRef, tuple);
+  EXPECT_TRUE(res);
+  EXPECT_EQ(2, CopyLogger::TimesConstructed);
+  EXPECT_EQ(1, CopyLogger::TimesCopied);
+
+  // Now they should be different, since the function call will make a copy.
+  res = false;
+  DispatchToFunction(&SomeLoggerMethCopy, tuple);
+  EXPECT_FALSE(res);
+  EXPECT_EQ(3, CopyLogger::TimesConstructed);
+  EXPECT_EQ(2, CopyLogger::TimesCopied);
+}