text: // Protocol Buffers - Google's data interchange format
  // Copyright 2008 Google Inc.  All rights reserved.
  // https://developers.google.com/protocol-buffers/
  //
  // Redistribution and use in source and binary forms, with or without
  // modification, are permitted provided that the following conditions are
  // met:
  //
  //     * Redistributions of source code must retain the above copyright
  // notice, this list of conditions and the following disclaimer.
  //     * Redistributions in binary form must reproduce the above
  // copyright notice, this list of conditions and the following disclaimer
  // in the documentation and/or other materials provided with the
  // distribution.
  //     * Neither the name of Google Inc. nor the names of its
  // contributors may be used to endorse or promote products derived from
  // this software without specific prior written permission.
  //
  // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  
  #include <google/protobuf/stubs/statusor.h>
  
  #include <errno.h>
  #include <memory>
  
  #include <google/protobuf/testing/googletest.h>
  #include <gtest/gtest.h>
  
  namespace google {
  namespace protobuf {
  namespace util {
  namespace {
  
  class Base1 {
   public:
    virtual ~Base1() {}
    int pad;
  };
  
  class Base2 {
   public:
    virtual ~Base2() {}
    int yetotherpad;
  };
  
  class Derived : public Base1, public Base2 {
   public:
    virtual ~Derived() {}
    int evenmorepad;
  };
  
  class CopyNoAssign {
   public:
    explicit CopyNoAssign(int value) : foo(value) {}
    CopyNoAssign(const CopyNoAssign& other) : foo(other.foo) {}
    int foo;
   private:
    const CopyNoAssign& operator=(const CopyNoAssign&);
  };
  
  TEST(StatusOr, TestDefaultCtor) {
    StatusOr<int> thing;
    EXPECT_FALSE(thing.ok());
    EXPECT_EQ(Status::UNKNOWN, thing.status());
  }
  
  TEST(StatusOr, TestStatusCtor) {
    StatusOr<int> thing(Status::CANCELLED);
    EXPECT_FALSE(thing.ok());
    EXPECT_EQ(Status::CANCELLED, thing.status());
  }
  
  TEST(StatusOr, TestValueCtor) {
    const int kI = 4;
    StatusOr<int> thing(kI);
    EXPECT_TRUE(thing.ok());
    EXPECT_EQ(kI, thing.ValueOrDie());
  }
  
  TEST(StatusOr, TestCopyCtorStatusOk) {
    const int kI = 4;
    StatusOr<int> original(kI);
    StatusOr<int> copy(original);
    EXPECT_EQ(original.status(), copy.status());
    EXPECT_EQ(original.ValueOrDie(), copy.ValueOrDie());
  }
  
  TEST(StatusOr, TestCopyCtorStatusNotOk) {
    StatusOr<int> original(Status::CANCELLED);
    StatusOr<int> copy(original);
    EXPECT_EQ(original.status(), copy.status());
  }
  
  TEST(StatusOr, TestCopyCtorStatusOKConverting) {
    const int kI = 4;
    StatusOr<int>    original(kI);
    StatusOr<double> copy(original);
    EXPECT_EQ(original.status(), copy.status());
    EXPECT_EQ(original.ValueOrDie(), copy.ValueOrDie());
  }
  
  TEST(StatusOr, TestCopyCtorStatusNotOkConverting) {
    StatusOr<int>    original(Status::CANCELLED);
    StatusOr<double> copy(original);
    EXPECT_EQ(original.status(), copy.status());
  }
  
  TEST(StatusOr, TestAssignmentStatusOk) {
    const int kI = 4;
    StatusOr<int> source(kI);
    StatusOr<int> target;
    target = source;
    EXPECT_EQ(source.status(), target.status());
    EXPECT_EQ(source.ValueOrDie(), target.ValueOrDie());
  }
  
  TEST(StatusOr, TestAssignmentStatusNotOk) {
    StatusOr<int> source(Status::CANCELLED);
    StatusOr<int> target;
    target = source;
    EXPECT_EQ(source.status(), target.status());
  }
  
  TEST(StatusOr, TestAssignmentStatusOKConverting) {
    const int kI = 4;
    StatusOr<int>    source(kI);
    StatusOr<double> target;
    target = source;
    EXPECT_EQ(source.status(), target.status());
    EXPECT_DOUBLE_EQ(source.ValueOrDie(), target.ValueOrDie());
  }
  
  TEST(StatusOr, TestAssignmentStatusNotOkConverting) {
    StatusOr<int>    source(Status::CANCELLED);
    StatusOr<double> target;
    target = source;
    EXPECT_EQ(source.status(), target.status());
  }
  
  TEST(StatusOr, TestStatus) {
    StatusOr<int> good(4);
    EXPECT_TRUE(good.ok());
    StatusOr<int> bad(Status::CANCELLED);
    EXPECT_FALSE(bad.ok());
    EXPECT_EQ(Status::CANCELLED, bad.status());
  }
  
  TEST(StatusOr, TestValue) {
    const int kI = 4;
    StatusOr<int> thing(kI);
    EXPECT_EQ(kI, thing.ValueOrDie());
  }
  
  TEST(StatusOr, TestValueConst) {
    const int kI = 4;
    const StatusOr<int> thing(kI);
    EXPECT_EQ(kI, thing.ValueOrDie());
  }
  
  TEST(StatusOr, TestPointerDefaultCtor) {
    StatusOr<int*> thing;
    EXPECT_FALSE(thing.ok());
    EXPECT_EQ(Status::UNKNOWN, thing.status());
  }
  
  TEST(StatusOr, TestPointerStatusCtor) {
    StatusOr<int*> thing(Status::CANCELLED);
    EXPECT_FALSE(thing.ok());
    EXPECT_EQ(Status::CANCELLED, thing.status());
  }
  
  TEST(StatusOr, TestPointerValueCtor) {
    const int kI = 4;
    StatusOr<const int*> thing(&kI);
    EXPECT_TRUE(thing.ok());
    EXPECT_EQ(&kI, thing.ValueOrDie());
  }
  
  TEST(StatusOr, TestPointerCopyCtorStatusOk) {
    const int kI = 0;
    StatusOr<const int*> original(&kI);
    StatusOr<const int*> copy(original);
    EXPECT_EQ(original.status(), copy.status());
    EXPECT_EQ(original.ValueOrDie(), copy.ValueOrDie());
  }
  
  TEST(StatusOr, TestPointerCopyCtorStatusNotOk) {
    StatusOr<int*> original(Status::CANCELLED);
    StatusOr<int*> copy(original);
    EXPECT_EQ(original.status(), copy.status());
  }
  
  TEST(StatusOr, TestPointerCopyCtorStatusOKConverting) {
    Derived derived;
    StatusOr<Derived*> original(&derived);
    StatusOr<Base2*>   copy(original);
    EXPECT_EQ(original.status(), copy.status());
    EXPECT_EQ(static_cast<const Base2*>(original.ValueOrDie()),
              copy.ValueOrDie());
  }
  
  TEST(StatusOr, TestPointerCopyCtorStatusNotOkConverting) {
    StatusOr<Derived*> original(Status::CANCELLED);
    StatusOr<Base2*>   copy(original);
    EXPECT_EQ(original.status(), copy.status());
  }
  
  TEST(StatusOr, TestPointerAssignmentStatusOk) {
    const int kI = 0;
    StatusOr<const int*> source(&kI);
    StatusOr<const int*> target;
    target = source;
    EXPECT_EQ(source.status(), target.status());
    EXPECT_EQ(source.ValueOrDie(), target.ValueOrDie());
  }
  
  TEST(StatusOr, TestPointerAssignmentStatusNotOk) {
    StatusOr<int*> source(Status::CANCELLED);
    StatusOr<int*> target;
    target = source;
    EXPECT_EQ(source.status(), target.status());
  }
  
  TEST(StatusOr, TestPointerAssignmentStatusOKConverting) {
    Derived derived;
    StatusOr<Derived*> source(&derived);
    StatusOr<Base2*>   target;
    target = source;
    EXPECT_EQ(source.status(), target.status());
    EXPECT_EQ(static_cast<const Base2*>(source.ValueOrDie()),
              target.ValueOrDie());
  }
  
  TEST(StatusOr, TestPointerAssignmentStatusNotOkConverting) {
    StatusOr<Derived*> source(Status::CANCELLED);
    StatusOr<Base2*>   target;
    target = source;
    EXPECT_EQ(source.status(), target.status());
  }
  
  TEST(StatusOr, TestPointerStatus) {
    const int kI = 0;
    StatusOr<const int*> good(&kI);
    EXPECT_TRUE(good.ok());
    StatusOr<const int*> bad(Status::CANCELLED);
    EXPECT_EQ(Status::CANCELLED, bad.status());
  }
  
  TEST(StatusOr, TestPointerValue) {
    const int kI = 0;
    StatusOr<const int*> thing(&kI);
    EXPECT_EQ(&kI, thing.ValueOrDie());
  }
  
  TEST(StatusOr, TestPointerValueConst) {
    const int kI = 0;
    const StatusOr<const int*> thing(&kI);
    EXPECT_EQ(&kI, thing.ValueOrDie());
  }
  
  }  // namespace
  }  // namespace util
  }  // namespace protobuf
  }  // namespace google
  