Add first version

[ric-plt/sdl.git] / tst / filedescriptor_test.cpp

diff --git a/tst/filedescriptor_test.cpp b/tst/filedescriptor_test.cpp
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+/*
+   Copyright (c) 2018-2019 Nokia.
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.
+*/
+
+#include <type_traits>
+#include <memory>
+#include <gtest/gtest.h>
+#include <gmock/gmock.h>
+#include "private/filedescriptor.hpp"
+#include "private/tst/systemmock.hpp"
+
+using namespace shareddatalayer;
+using namespace shareddatalayer::tst;
+using namespace testing;
+
+namespace
+{
+    class FileDescriptorTest: public Test
+    {
+    public:
+        SystemMock systemMock;
+        std::function<void(int)> atCloseCb = [&](int fd) { delFD(fd); };
+
+        MOCK_METHOD1(delFD, void(int));
+    };
+}
+
+TEST_F(FileDescriptorTest, IsNotCopyable)
+{
+    EXPECT_FALSE(std::is_copy_assignable<FileDescriptor>::value);
+    EXPECT_FALSE(std::is_copy_constructible<FileDescriptor>::value);
+}
+
+TEST_F(FileDescriptorTest, IsNotDefaultConstructible)
+{
+    EXPECT_FALSE(std::is_default_constructible<FileDescriptor>::value);
+}
+
+TEST_F(FileDescriptorTest, IsConvertibleToInt)
+{
+    EXPECT_CALL(systemMock, close(1)).Times(1);
+    EXPECT_EQ(-1, FileDescriptor(-1));
+    EXPECT_EQ(1, FileDescriptor(systemMock, 1));
+}
+
+TEST_F(FileDescriptorTest, WhenDestructedFileDescriptorIsClosed)
+{
+    EXPECT_CALL(systemMock, close(1)).Times(1);
+    FileDescriptor(systemMock, 1);
+}
+
+TEST_F(FileDescriptorTest, InvalidFileDescriptorIsNotClosed)
+{
+    EXPECT_CALL(systemMock, close(_)).Times(0);
+    FileDescriptor(systemMock, -1);
+}
+
+TEST_F(FileDescriptorTest, DetachWhenDestructed)
+{
+    EXPECT_CALL(*this, delFD(1)).Times(1);
+    EXPECT_CALL(systemMock, close(1)).Times(1);
+    FileDescriptor(systemMock, 1).atClose(atCloseCb);
+}
+
+TEST_F(FileDescriptorTest, InvalidFileDescriptorIsNotDetached)
+{
+    EXPECT_CALL(*this, delFD(_)).Times(0);
+    FileDescriptor(-1).atClose(atCloseCb);
+}
+
+TEST_F(FileDescriptorTest, OwnershipIsTransferredInMoveConstructor)
+{
+    const int rawfd(100);
+    InSequence dummy;
+    std::unique_ptr<FileDescriptor> fd1(new FileDescriptor(systemMock, rawfd));
+    fd1->atClose(atCloseCb);
+    std::unique_ptr<FileDescriptor> fd2(new FileDescriptor(std::move(*fd1)));
+    EXPECT_CALL(systemMock, close(_)).Times(0);
+    EXPECT_CALL(*this, delFD(_)).Times(0);
+    fd1.reset();
+    EXPECT_CALL(*this, delFD(rawfd)).Times(1);
+    EXPECT_CALL(systemMock, close(rawfd)).Times(1);
+    fd2.reset();
+}
+
+TEST_F(FileDescriptorTest, OldFdIsClosedAndOwnershipIsTransferredInMoveAssignment)
+{
+    const int rawfd1(100);
+    const int rawfd2(200);
+    InSequence dummy;
+    std::unique_ptr<FileDescriptor> fd1(new FileDescriptor(systemMock, rawfd1));
+    fd1->atClose(atCloseCb);
+    std::unique_ptr<FileDescriptor> fd2(new FileDescriptor(systemMock, rawfd2));
+    fd2->atClose(atCloseCb);
+    EXPECT_CALL(*this, delFD(rawfd2)).Times(1);
+    EXPECT_CALL(systemMock, close(rawfd2)).Times(1);
+    *fd2 = std::move(*fd1);
+    fd1.reset();
+    EXPECT_CALL(*this, delFD(rawfd1)).Times(1);
+    EXPECT_CALL(systemMock, close(rawfd1)).Times(1);
+    fd2.reset();
+}