Add JoinFilename to testsupport code, replacing use of rtc::Pathname.

This is a partial revert of https://codereview.webrtc.org/2533213005,
deleting rtc::File methods accepting an rtc::Pathname argument.

Bug: webrtc:6424
Change-Id: Ib16bdc7294dbddfa12ba9ae206c024ff97e529a4
Reviewed-on: https://webrtc-review.googlesource.com/80180
Commit-Queue: Niels Moller <nisse@webrtc.org>
Reviewed-by: Patrik Höglund <phoglund@webrtc.org>
Reviewed-by: Karl Wiberg <kwiberg@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#23489}

rtc_base/file.cc

@@ -14,15 +14,6 @@
 
 namespace rtc {
 
-namespace {
-
-std::string NormalizePathname(Pathname&& path) {
-  path.Normalize();
-  return path.pathname();
-}
-
-}  // namespace
-
 File::File(PlatformFile file) : file_(file) {}
 
 File::File() : file_(kInvalidPlatformFileValue) {}
@@ -36,46 +27,16 @@ File File::Open(const std::string& path) {
   return File(OpenPlatformFile(path));
 }
 
-// static
-File File::Open(Pathname&& path) {
-  return Open(NormalizePathname(std::move(path)));
-}
-
-// static
-File File::Open(const Pathname& path) {
-  return Open(Pathname(path));
-}
-
 // static
 File File::Create(const std::string& path) {
   return File(CreatePlatformFile(path));
 }
 
-// static
-File File::Create(Pathname&& path) {
-  return Create(NormalizePathname(std::move(path)));
-}
-
-// static
-File File::Create(const Pathname& path) {
-  return Create(Pathname(path));
-}
-
 // static
 bool File::Remove(const std::string& path) {
   return RemoveFile(path);
 }
 
-// static
-bool File::Remove(Pathname&& path) {
-  return Remove(NormalizePathname(std::move(path)));
-}
-
-// static
-bool File::Remove(const Pathname& path) {
-  return Remove(Pathname(path));
-}
-
 File::File(File&& other) : file_(other.file_) {
   other.file_ = kInvalidPlatformFileValue;
 }

rtc_base/file.h

@@ -16,7 +16,6 @@
 #include <string>
 
 #include "rtc_base/constructormagic.h"
-#include "rtc_base/pathutils.h"
 #include "rtc_base/platform_file.h"
 
 namespace rtc {
@@ -40,17 +39,11 @@ class File {
 
   // Open and Create give files with both reading and writing enabled.
   static File Open(const std::string& path);
-  static File Open(Pathname&& path);
-  static File Open(const Pathname& path);
   // If the file already exists it will be overwritten.
   static File Create(const std::string& path);
-  static File Create(Pathname&& path);
-  static File Create(const Pathname& path);
 
   // Remove a file in the file system.
   static bool Remove(const std::string& path);
-  static bool Remove(Pathname&& path);
-  static bool Remove(const Pathname& path);
 
   size_t Write(const uint8_t* data, size_t length);
   size_t Read(uint8_t* buffer, size_t length);

rtc_base/file_unittest.cc

@@ -163,39 +163,13 @@ TEST_F(FileTest, RandomAccessReadWrite) {
   EXPECT_TRUE(VerifyBuffer(out, 2, 0));
 }
 
-TEST_F(FileTest, OpenFromPathname) {
-  {
-    File file = File::Open(Pathname(path_));
-    ASSERT_TRUE(file.IsOpen()) << "Error: " << LastError();
-  }
-
-  {
-    Pathname path(path_);
-    File file = File::Open(path);
-    ASSERT_TRUE(file.IsOpen()) << "Error: " << LastError();
-  }
-}
-
-TEST_F(FileTest, CreateFromPathname) {
-  {
-    File file = File::Create(Pathname(path_));
-    ASSERT_TRUE(file.IsOpen()) << "Error: " << LastError();
-  }
-
-  {
-    Pathname path(path_);
-    File file = File::Create(path);
-    ASSERT_TRUE(file.IsOpen()) << "Error: " << LastError();
-  }
-}
-
 TEST_F(FileTest, ShouldBeAbleToRemoveFile) {
   {
-    File file = File::Open(Pathname(path_));
+    File file = File::Open(path_);
     ASSERT_TRUE(file.IsOpen()) << "Error: " << LastError();
   }
 
-  ASSERT_TRUE(File::Remove(Pathname(path_))) << "Error: " << LastError();
+  ASSERT_TRUE(File::Remove(path_)) << "Error: " << LastError();
 }
 
 }  // namespace rtc

test/testsupport/fileutils.cc

@@ -355,6 +355,11 @@ std::string ResourcePath(const std::string& name,
 #endif  // defined (WEBRTC_IOS)
 }
 
+std::string JoinFilename(const std::string& dir, const std::string& name) {
+  RTC_CHECK(!dir.empty()) << "Special cases not implemented.";
+  return dir + kPathDelimiter + name;
+}
+
 size_t GetFileSize(const std::string& filename) {
   FILE* f = fopen(filename.c_str(), "rb");
   size_t size = 0;

test/testsupport/fileutils.h

@@ -67,8 +67,10 @@ std::string GenerateTempFilename(const std::string& dir,
 //           If a directory path is prepended to the filename, a subdirectory
 //           hierarchy reflecting that path is assumed to be present.
 //    extension - File extension, without the dot, i.e. "bmp" or "yuv".
-std::string ResourcePath(const std::string& name,
-                         const std::string& extension);
+std::string ResourcePath(const std::string& name, const std::string& extension);
+
+// Joins directory name and file name, separated by the path delimiter.
+std::string JoinFilename(const std::string& dir, const std::string& name);
 
 // Gets the current working directory for the executing program.
 // Returns "./" if for some reason it is not possible to find the working

test/testsupport/test_artifacts.cc

@@ -15,7 +15,6 @@
 #include "rtc_base/file.h"
 #include "rtc_base/flags.h"
 #include "rtc_base/logging.h"
-#include "rtc_base/pathutils.h"
 #include "test/testsupport/fileutils.h"
 
 namespace {
@@ -55,7 +54,7 @@ bool WriteToTestArtifactsDir(const char* filename,
   }
 
   rtc::File output =
-      rtc::File::Create(rtc::Pathname(FLAG_test_artifacts_dir, filename));
+      rtc::File::Create(JoinFilename(FLAG_test_artifacts_dir, filename));
 
   return output.IsOpen() && output.Write(buffer, length) == length;
 }

test/testsupport/test_artifacts_unittest.cc

@@ -19,6 +19,7 @@
 #include "rtc_base/pathutils.h"
 #include "rtc_base/platform_file.h"
 #include "test/gtest.h"
+#include "test/testsupport/fileutils.h"
 
 DECLARE_string(test_artifacts_dir);
 
@@ -42,7 +43,7 @@ TEST(IsolatedOutputTest, ShouldBeAbleToWriteContent) {
   const char* filename = "a-file";
   const char* content = "some-contents";
   if (WriteToTestArtifactsDir(filename, content)) {
-    rtc::Pathname out_file(FLAG_test_artifacts_dir, filename);
+    std::string out_file = JoinFilename(FLAG_test_artifacts_dir, filename);
     rtc::File input = rtc::File::Open(out_file);
     EXPECT_TRUE(input.IsOpen());
     EXPECT_TRUE(input.Seek(0));