sapling/eden/fs/inodes/test/SymlinkTest.cpp

/*
 *  Copyright (c) 2017-present, Facebook, Inc.
 *  All rights reserved.
 *
 *  This source code is licensed under the BSD-style license found in the
 *  LICENSE file in the root directory of this source tree. An additional grant
 *  of patent rights can be found in the PATENTS file in the same directory.
 *
 */
#include <folly/Format.h>
#include <folly/String.h>
#include <folly/test/TestUtils.h>
#include <gtest/gtest.h>

#include "eden/fs/inodes/EdenMount.h"
#include "eden/fs/inodes/FileInode.h"
#include "eden/fs/inodes/InodeMap.h"
#include "eden/fs/inodes/TreeInode.h"
#include "eden/fs/testharness/FakeBackingStore.h"
#include "eden/fs/testharness/FakeTreeBuilder.h"
#include "eden/fs/testharness/TestMount.h"
#include "eden/fs/testharness/TestUtil.h"
#include "eden/fs/utils/Bug.h"

using namespace facebook::eden;
using folly::StringPiece;

class SymlinkTest : public ::testing::Test {
 protected:
  void SetUp() override {
    // Set up a directory structure that we will use for most
    // of the tests below
    FakeTreeBuilder builder;
    builder.setFiles({
        {"doc.txt", "hello\n"},
    });
    mount_.initialize(builder);
    mount_.mkdir("a");
  }

  TestMount mount_;
};

TEST_F(SymlinkTest, makeSymlink) {
  StringPiece name{"s1"}; // node to create in the filesystem
  StringPiece target{"foo!"}; // the value we want readlink to return

  auto root = mount_.getTreeInode(RelativePathPiece());
  auto inode = root->symlink(PathComponentPiece{name}, target);
  EXPECT_EQ(dtype_t::Symlink, inode->getType());
  EXPECT_EQ(inode->readlink().get(), target);
  // Let's make sure that we can load it up and see the right results
  auto loadedInode = mount_.getFileInode(RelativePathPiece{name});
  EXPECT_EQ(loadedInode->readlink().get(), target);
}

TEST_F(SymlinkTest, makeSymlinkCollisionFile) {
  StringPiece name{"doc.txt"}; // node to create in the filesystem
  StringPiece target{"foo!"}; // the value we want readlink to return

  auto root = mount_.getTreeInode(RelativePathPiece());
  // Name already exists, so we expect this to fail
  EXPECT_THROW_ERRNO(root->symlink(PathComponentPiece{name}, target), EEXIST);
}

TEST_F(SymlinkTest, makeSymlinkCollisionDir) {
  StringPiece name{"a"}; // node to create in the filesystem
  StringPiece target{"foo!"}; // the value we want readlink to return

  auto root = mount_.getTreeInode(RelativePathPiece());
  // Name already exists, so we expect this to fail
  EXPECT_THROW_ERRNO(root->symlink(PathComponentPiece{name}, target), EEXIST);
}