[PATCH] Add unit tests for OwningPtr<T>.

[Ahmed Charles]

Hi chandlerc,

This is the first step in changing from using OwningPtr<T> to std::unique_ptr<T>.

http://llvm-reviews.chandlerc.com/D2907

Files:
  unittests/ADT/CMakeLists.txt
  unittests/ADT/OwningPtrTest.cpp

Index: unittests/ADT/CMakeLists.txt
===================================================================
--- unittests/ADT/CMakeLists.txt
+++ unittests/ADT/CMakeLists.txt
@@ -21,6 +21,7 @@
   IntrusiveRefCntPtrTest.cpp
   MapVectorTest.cpp
   OptionalTest.cpp
+  OwningPtrTest.cpp
   PackedVectorTest.cpp
   PointerUnionTest.cpp
   SCCIteratorTest.cpp
Index: unittests/ADT/OwningPtrTest.cpp
===================================================================
--- /dev/null
+++ unittests/ADT/OwningPtrTest.cpp
@@ -0,0 +1,182 @@
+//===- llvm/unittest/ADT/OwningPtrTest.cpp - OwningPtr unit tests -----------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#include "gtest/gtest.h"
+#include "llvm/ADT/OwningPtr.h"
+using namespace llvm;
+
+namespace {
+
+struct TrackDestructor {
+  static unsigned Destructions;
+  int val;
+  explicit TrackDestructor(int val) : val(val) {
+  }
+  ~TrackDestructor() {
+    ++Destructions;
+  }
+  static void ResetCounts() {
+    Destructions = 0;
+  }
+private:
+  TrackDestructor(const TrackDestructor& other) LLVM_DELETED_FUNCTION;
+  TrackDestructor &operator=(const TrackDestructor& other) LLVM_DELETED_FUNCTION;
+  TrackDestructor(TrackDestructor&& other) LLVM_DELETED_FUNCTION;
+  TrackDestructor &operator=(TrackDestructor&& other) LLVM_DELETED_FUNCTION;
+};
+
+unsigned TrackDestructor::Destructions = 0;
+
+// Test fixture
+class OwningPtrTest : public testing::Test {
+};
+
+TEST_F(OwningPtrTest, DefaultConstruction) {
+  TrackDestructor::ResetCounts();
+  {
+    OwningPtr<TrackDestructor> O;
+    EXPECT_FALSE(O);
+    EXPECT_TRUE(!O);
+    EXPECT_FALSE(O.get());
+    EXPECT_FALSE(O.isValid());
+  }
+  EXPECT_EQ(0u, TrackDestructor::Destructions);
+}
+
+TEST_F(OwningPtrTest, PtrConstruction) {
+  TrackDestructor::ResetCounts();
+  {
+    OwningPtr<TrackDestructor> O(new TrackDestructor(3));
+    EXPECT_TRUE(O);
+    EXPECT_FALSE(!O);
+    EXPECT_TRUE(O.get());
+    EXPECT_TRUE(O.isValid());
+    EXPECT_EQ(3, (*O).val);
+    EXPECT_EQ(3, O->val);
+    EXPECT_EQ(0u, TrackDestructor::Destructions);
+  }
+  EXPECT_EQ(1u, TrackDestructor::Destructions);
+}
+
+TEST_F(OwningPtrTest, Reset) {
+  TrackDestructor::ResetCounts();
+  OwningPtr<TrackDestructor> O(new TrackDestructor(3));
+  EXPECT_EQ(0u, TrackDestructor::Destructions);
+  O.reset();
+  EXPECT_FALSE(O);
+  EXPECT_TRUE(!O);
+  EXPECT_FALSE(O.get());
+  EXPECT_FALSE(O.isValid());
+  EXPECT_EQ(1u, TrackDestructor::Destructions);
+}
+
+TEST_F(OwningPtrTest, Take) {
+  TrackDestructor::ResetCounts();
+  TrackDestructor *T = 0;
+  {
+    OwningPtr<TrackDestructor> O(new TrackDestructor(3));
+    T = O.take();
+    EXPECT_FALSE(O);
+    EXPECT_TRUE(!O);
+    EXPECT_FALSE(O.get());
+    EXPECT_FALSE(O.isValid());
+    EXPECT_TRUE(T);
+    EXPECT_EQ(3, T->val);
+    EXPECT_EQ(0u, TrackDestructor::Destructions);
+  }
+  delete T;
+  EXPECT_EQ(1u, TrackDestructor::Destructions);
+}
+
+TEST_F(OwningPtrTest, MoveConstruction) {
+  TrackDestructor::ResetCounts();
+  {
+    OwningPtr<TrackDestructor> A(new TrackDestructor(3));
+    OwningPtr<TrackDestructor> B(std::move(A));
+    EXPECT_FALSE(A);
+    EXPECT_TRUE(!A);
+    EXPECT_FALSE(A.get());
+    EXPECT_FALSE(A.isValid());
+    EXPECT_TRUE(B);
+    EXPECT_FALSE(!B);
+    EXPECT_TRUE(B.get());
+    EXPECT_TRUE(B.isValid());
+    EXPECT_EQ(3, (*B).val);
+    EXPECT_EQ(3, B->val);
+    EXPECT_EQ(0u, TrackDestructor::Destructions);
+  }
+  EXPECT_EQ(1u, TrackDestructor::Destructions);
+}
+
+TEST_F(OwningPtrTest, MoveAssignment) {
+  TrackDestructor::ResetCounts();
+  {
+    OwningPtr<TrackDestructor> A(new TrackDestructor(3));
+    OwningPtr<TrackDestructor> B(new TrackDestructor(4));
+    B = std::move(A);
+    EXPECT_FALSE(A);
+    EXPECT_TRUE(!A);
+    EXPECT_FALSE(A.get());
+    EXPECT_FALSE(A.isValid());
+    EXPECT_TRUE(B);
+    EXPECT_FALSE(!B);
+    EXPECT_TRUE(B.get());
+    EXPECT_TRUE(B.isValid());
+    EXPECT_EQ(3, (*B).val);
+    EXPECT_EQ(3, B->val);
+    EXPECT_EQ(1u, TrackDestructor::Destructions);
+  }
+  EXPECT_EQ(2u, TrackDestructor::Destructions);
+}
+
+TEST_F(OwningPtrTest, Swap) {
+  TrackDestructor::ResetCounts();
+  {
+    OwningPtr<TrackDestructor> A(new TrackDestructor(3));
+    OwningPtr<TrackDestructor> B(new TrackDestructor(4));
+    B.swap(A);
+    EXPECT_TRUE(A);
+    EXPECT_FALSE(!A);
+    EXPECT_TRUE(A.get());
+    EXPECT_TRUE(A.isValid());
+    EXPECT_EQ(4, (*A).val);
+    EXPECT_EQ(4, A->val);
+    EXPECT_TRUE(B);
+    EXPECT_FALSE(!B);
+    EXPECT_TRUE(B.get());
+    EXPECT_TRUE(B.isValid());
+    EXPECT_EQ(3, (*B).val);
+    EXPECT_EQ(3, B->val);
+    EXPECT_EQ(0u, TrackDestructor::Destructions);
+  }
+  EXPECT_EQ(2u, TrackDestructor::Destructions);
+  TrackDestructor::ResetCounts();
+  {
+    OwningPtr<TrackDestructor> A(new TrackDestructor(3));
+    OwningPtr<TrackDestructor> B(new TrackDestructor(4));
+    swap(A, B);
+    EXPECT_TRUE(A);
+    EXPECT_FALSE(!A);
+    EXPECT_TRUE(A.get());
+    EXPECT_TRUE(A.isValid());
+    EXPECT_EQ(4, (*A).val);
+    EXPECT_EQ(4, A->val);
+    EXPECT_TRUE(B);
+    EXPECT_FALSE(!B);
+    EXPECT_TRUE(B.get());
+    EXPECT_TRUE(B.isValid());
+    EXPECT_EQ(3, (*B).val);
+    EXPECT_EQ(3, B->val);
+    EXPECT_EQ(0u, TrackDestructor::Destructions);
+  }
+  EXPECT_EQ(2u, TrackDestructor::Destructions);
+}
+
+} // end anonymous namespace
+
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