Merge pull request #9307 from Dentomologist/add-deleted-file-missing-warning-flag

Add File::Delete and File::DeleteDir warning flags

Source/Core/Common/FileUtil.cpp

@@ -135,7 +135,7 @@ bool IsFile(const std::string& path)
 
 // Deletes a given filename, return true on success
 // Doesn't supports deleting a directory
-bool Delete(const std::string& filename)
+bool Delete(const std::string& filename, IfAbsentBehavior behavior)
 {
   INFO_LOG_FMT(COMMON, "Delete: file {}", filename);
 
@@ -154,7 +154,10 @@ bool Delete(const std::string& filename)
   // Return true because we care about the file not being there, not the actual delete.
   if (!file_info.Exists())
   {
-    WARN_LOG_FMT(COMMON, "Delete: {} does not exist", filename);
+    if (behavior == IfAbsentBehavior::ConsoleWarning)
+    {
+      WARN_LOG_FMT(COMMON, "Delete: {} does not exist", filename);
+    }
     return true;
   }
 
@@ -253,10 +256,20 @@ bool CreateFullPath(const std::string& fullPath)
 }
 
 // Deletes a directory filename, returns true on success
-bool DeleteDir(const std::string& filename)
+bool DeleteDir(const std::string& filename, IfAbsentBehavior behavior)
 {
   INFO_LOG_FMT(COMMON, "DeleteDir: directory {}", filename);
 
+  // Return true because we care about the directory not being there, not the actual delete.
+  if (!File::Exists(filename))
+  {
+    if (behavior == IfAbsentBehavior::ConsoleWarning)
+    {
+      WARN_LOG_FMT(COMMON, "DeleteDir: {} does not exist", filename);
+    }
+    return true;
+  }
+
   // check if a directory
   if (!IsDirectory(filename))
   {

Source/Core/Common/FileUtil.h

@@ -136,12 +136,20 @@ bool CreateDir(const std::string& filename);
 // Creates the full path of fullPath returns true on success
 bool CreateFullPath(const std::string& fullPath);
 
+enum class IfAbsentBehavior
+{
+  ConsoleWarning,
+  NoConsoleWarning
+};
+
 // Deletes a given filename, return true on success
 // Doesn't supports deleting a directory
-bool Delete(const std::string& filename);
+bool Delete(const std::string& filename,
+            IfAbsentBehavior behavior = IfAbsentBehavior::ConsoleWarning);
 
 // Deletes a directory filename, returns true on success
-bool DeleteDir(const std::string& filename);
+bool DeleteDir(const std::string& filename,
+               IfAbsentBehavior behavior = IfAbsentBehavior::ConsoleWarning);
 
 // renames file srcFilename to destFilename, returns true on success
 bool Rename(const std::string& srcFilename, const std::string& destFilename);

Source/UnitTests/FileUtil.cpp

@@ -0,0 +1,103 @@
+// Copyright 2020 Dolphin Emulator Project
+// Licensed under GPLv2+
+// Refer to the license.txt file included.
+
+#include <array>
+#include <gtest/gtest.h>
+
+#include "Common/FileUtil.h"
+
+class FileUtilTest : public testing::Test
+{
+protected:
+  FileUtilTest()
+      : m_parent_directory(File::CreateTempDir()), m_file_path(m_parent_directory + "/file.txt"),
+        m_directory_path(m_parent_directory + "/dir"),
+        m_invalid_path(m_parent_directory + "/invalid.txt")
+  {
+  }
+
+  ~FileUtilTest() override
+  {
+    if (!m_parent_directory.empty())
+    {
+      File::DeleteDirRecursively(m_parent_directory);
+    }
+  }
+
+  void SetUp()
+  {
+    if (m_parent_directory.empty())
+    {
+      FAIL();
+    }
+  }
+
+  constexpr static std::array<File::IfAbsentBehavior, 2> s_warning_behaviors = {
+      File::IfAbsentBehavior::ConsoleWarning,
+      File::IfAbsentBehavior::NoConsoleWarning,
+  };
+
+  const std::string m_parent_directory;
+  const std::string m_file_path;
+  const std::string m_directory_path;
+  const std::string m_invalid_path;
+};
+
+static void DeleteShouldNotRemoveDirectory(const std::string& path, File::IfAbsentBehavior behavior)
+{
+  File::CreateDir(path);
+  EXPECT_FALSE(File::Delete(path, behavior));
+  File::DeleteDir(path, behavior);
+}
+
+static void DeleteShouldRemoveFile(const std::string& path, File::IfAbsentBehavior behavior)
+{
+  File::CreateEmptyFile(path);
+  EXPECT_TRUE(File::Delete(path, behavior));
+}
+
+static void DeleteShouldReturnTrueForInvalidPath(const std::string& path,
+                                                 File::IfAbsentBehavior behavior)
+{
+  EXPECT_TRUE(File::Delete(path, behavior));
+}
+
+static void DeleteDirShouldRemoveDirectory(const std::string& path, File::IfAbsentBehavior behavior)
+{
+  File::CreateDir(path);
+  EXPECT_TRUE(File::DeleteDir(path, behavior));
+}
+
+static void DeleteDirShouldNotRemoveFile(const std::string& path, File::IfAbsentBehavior behavior)
+{
+  File::CreateEmptyFile(path);
+  EXPECT_FALSE(File::DeleteDir(path, behavior));
+  File::Delete(path, behavior);
+}
+
+static void DeleteDirShouldReturnTrueForInvalidPath(const std::string& path,
+                                                    File::IfAbsentBehavior behavior)
+{
+  EXPECT_TRUE(File::DeleteDir(path, behavior));
+}
+
+TEST_F(FileUtilTest, Delete)
+{
+  for (const auto behavior : s_warning_behaviors)
+  {
+    DeleteShouldNotRemoveDirectory(m_directory_path, behavior);
+    DeleteShouldRemoveFile(m_file_path, behavior);
+    DeleteShouldReturnTrueForInvalidPath(m_invalid_path, behavior);
+  }
+}
+
+TEST_F(FileUtilTest, DeleteDir)
+{
+  for (const auto behavior : s_warning_behaviors)
+  {
+    DeleteDirShouldRemoveDirectory(m_directory_path, behavior);
+    DeleteDirShouldNotRemoveFile(m_file_path, behavior);
+    DeleteDirShouldReturnTrueForInvalidPath(m_invalid_path, behavior);
+  }
+}

Source/UnitTests/UnitTests.vcxproj

@@ -68,6 +68,7 @@
     <ClCompile Include="Core\IOS\FS\FileSystemTest.cpp" />
     <ClCompile Include="Core\MMIOTest.cpp" />
     <ClCompile Include="Core\PageFaultTest.cpp" />
+    <ClCompile Include="FileUtil.cpp" />
     <ClCompile Include="VideoCommon\VertexLoaderTest.cpp" />
     <ClCompile Include="StubHost.cpp" />
   </ItemGroup>