wehub-resource-sync
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80 lines
3.7 KiB
Swift
80 lines
3.7 KiB
Swift
//===----------------------------------------------------------------------===//
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// Copyright © 2026 Apple Inc. and the Containerization project authors.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// https://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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//===----------------------------------------------------------------------===//
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import Foundation
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import SystemPackage
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import Testing
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@testable import ContainerizationEXT4
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struct Ext4FormatLinkTests {
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@Test func hardlinkLinksCount() throws {
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func makeFile(unlink: Bool) throws -> FilePath {
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let path = FilePath(
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FileManager.default.temporaryDirectory
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.appendingPathComponent(UUID().uuidString, isDirectory: false))
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let fmt = try EXT4.Formatter(path, minDiskSize: 32.kib())
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try fmt.create(path: "/original", mode: EXT4.Inode.Mode(.S_IFREG, 0o755), buf: nil)
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try fmt.link(link: "/hardlink", target: "/original")
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if unlink {
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try fmt.unlink(path: "/hardlink")
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}
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try fmt.close()
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return path
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}
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let afterLink = try makeFile(unlink: false)
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#expect(try EXT4.EXT4Reader(blockDevice: afterLink).stat("/original").inode.linksCount == 2)
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let afterUnlink = try makeFile(unlink: true)
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#expect(try EXT4.EXT4Reader(blockDevice: afterUnlink).stat("/original").inode.linksCount == 1)
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}
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@Test func hardlinkCreatesMissingParents() throws {
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let path = FilePath(
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FileManager.default.temporaryDirectory
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.appendingPathComponent(UUID().uuidString, isDirectory: false))
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defer { try? FileManager.default.removeItem(at: path.url) }
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let fmt = try EXT4.Formatter(path, minDiskSize: 32.kib())
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try fmt.create(path: "/original", mode: EXT4.Inode.Mode(.S_IFREG, 0o755), buf: nil)
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// Parent dirs /a and /a/b do not exist yet; link must create them implicitly.
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try fmt.link(link: "/a/b/hardlink", target: "/original")
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try fmt.close()
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let reader = try EXT4.EXT4Reader(blockDevice: path)
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#expect(try reader.stat("/a").inode.mode.isDir())
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#expect(try reader.stat("/a/b").inode.mode.isDir())
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let target = try reader.stat("/original")
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#expect(try reader.stat("/a/b/hardlink").inodeNumber == target.inodeNumber)
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#expect(target.inode.linksCount == 2)
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}
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@Test func unlinkFirstInodeFreesInode() throws {
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let emptyPath = FilePath(FileManager.default.temporaryDirectory.appendingPathComponent(UUID().uuidString, isDirectory: false))
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defer { try? FileManager.default.removeItem(at: emptyPath.url) }
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try EXT4.Formatter(emptyPath, minDiskSize: 32.kib()).close()
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let path = FilePath(FileManager.default.temporaryDirectory.appendingPathComponent(UUID().uuidString, isDirectory: false))
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defer { try? FileManager.default.removeItem(at: path.url) }
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let fmt = try EXT4.Formatter(path, minDiskSize: 32.kib())
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try fmt.create(path: FilePath("/file"), mode: EXT4.Inode.Mode(.S_IFREG, 0o755), buf: nil)
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try fmt.unlink(path: FilePath("/file"))
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try fmt.close()
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#expect(try EXT4.EXT4Reader(blockDevice: path).superBlock.freeInodesCount == EXT4.EXT4Reader(blockDevice: emptyPath).superBlock.freeInodesCount)
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}
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}
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